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					University of Manitoba                  AIR DISTRIBUTION                                       Section 15800

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         .1   All drawings and all sections of the specifications shall apply to and form an integral part
              of this section.

         .1    Execute work of this Section only by skilled tradespeople regularly employed in the
               manufacture and installation of sheetmetal ductwork and air handling equipment.

         .1   Refer to Section 01810 Quality Commissioning for the details of the commissioning process.

         .1    Submit shop drawings for all system components.
         .2    Provide fan curves for all fans 100 l/s (200 CFM) and greater capacity.
         .3    Refer to Section 01810 for additional documentation details and requirements.

         .1   Provide a complete installation of ventilation systems as shown of the Drawings and
              Detail Drawings.
         .2   Install all automatic dampers supplied by Section 15900.


         .1   Fibreglass materials are not to be used in any internal portion of the ventilation systems.
         .2   Provide acoustic lining in all ductwork where indicated on drawings, 25mm (1") thick, 24
              kg/m; (1.5 lbs/ft ;) density, closed-cell foam sheet insulation. Where located outdoors,
              use 50mm (2") thick insulation.
         .3   Duct sizes to increase accordingly to maintain equivalent free area.
         .4   All acoustic cross talk silencers and ducting shall also be constructed with closed-cell,
              sheet insulation materials.
         .5   Product must be cleanable and have zero water absorption.
         .6   Installation shall not include any tapes, fabrics, cements, or other materials, which hold
              moisture, offer the opportunity for mold growth, or are not cleanable.
         .7   Installation shall withstand air velocities of up to 13 m/s (2500 fpm).

         .1     Provide air to air heat exchanger with 0.85 mm (22 gauge) galvanized steel enclosure,
                0.021" (0.5 mm) corrugated aluminum plates bonded with non-combustible polyester resin
                with 200°F (90°C) maximum temperature, one 50 mm (2") drain connection on exhaust side
                at high temperature end, plate support 6" 150 mm top and bottom, and S-lock duct
                connection, 3/8" (10 mm) plate spacing.
         .2     Provide hinged and latched double thickness, insulated access doors at all duct
         .3     Provide prefilter bank on both air inlets to heat exchanger.
         .4     Notwithstanding that stated above, in no case shall the exchanger casing be constructed of
                metal thinner than that of the heaviest duct section in equivalent galvanized iron, connecting
                to the unit.
         .5     Kitchen exhaust applications shall be equipped with wash down header, solenoid valve
                wash cycle timer, detergent bottle, etc., for a complete system ready for operation.
         .6     Kitchen exhaust applications shall have U.L.C. fire dampers on the fresh air inlet and outlet

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University of Manitoba                 AIR DISTRIBUTION                                       Section 15800

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                 and any ductwork between such closures and unit shall be of a thickness equal to that of the
         .7      Units shall have an efficiency of (  ) when handling ( ) cfm ( ) l/s on supply and on
                 exhaust, with a pressure drop of ) s.p.

         .1   Natural draft appliances:
              .1      Gas vents for atmospheric gas–fired equipment: Type B complete with all
                      supports, flashings, fire stops, base support, rain caps, base tee with cleanout,
                      etc., in sizes as shown complete to meet requirements of Authorities. Provide
                      insulated type vent, in accordance code, where located outdoors (above the
                      roofline or beyond exterior walls).
         .2   For forced draft appliances [and stand-by generator exhaust]:
              .1      Boiler stack and breeching components, supports and terminations shall be
                      factory prefabricated and tested. All components shall be listed by Underwriters
                      Laboratories (ULC), as described in NFPA 211. The breeching and stack system
                      shall comply with all safety and building codes where applicable.
              .2      Breeching assemblies and stacks shall have inner walls of 20 gauge, type 304
                      stainless steel. Indoor assemblies and stacks shall have outer walls of aluminum
                      coated 20gauge steel. Portions of the stack system on the outside of the building
                      shall be furnished with an outer wall of 20 gauge, 304 stainless steel.
              .3      Breeching and stack system sections joints shall be sealed by use of
                      containment bands with captive fasteners and high temperature joint sealant.
                      Assemblies utilizing metal screws through inner and/or outer walls will not be
              .4      The breeching and stack system joints shall maintain airtight integrity at
                      pressures up to 72” (180 cm). Breeching and stack systems shall be designed to
                      adjust to thermal expansion caused by the heating and cooling of normal
                      equipment operation.
              .5      The breeching and stack system Manufacturer must furnish complete system
                      CAD submittal drawings of the assembly.
              .6      Material required for breechings and stacks within the building is based on
                      Cleaver-Brooks Model CBS-11 having double wall and 1” air insulation. Material
                      required for stack systems on the building exterior is based on Cleaver-Brooks
                      Model ICBS-11 having double wall and 1” fibre insulation.
              .7      All system components must be warranted for a minimum of 15 years when
                      installed in accordance with the Manufacturer‟s instructions and operated within
                      the design parameters.
              .8      .8       Where shown and sized on the drawings for forced draft equipment,
                      provide breechings of 10 gauge [galvanized iron] [stainless steel] [mild steel]
                      with welded or flanged joints. Flanged joints: 25mm x 25mm x 3mm (1” x 1” x
                      1/8”) stainless steel angle continuously welded to the breeching, sealed with
                      approved high temperature gasketting and secured with 6mm (1/4”) bolts,
                      100mm (4”) on centre. Cleanouts: 6mm (1/4”) [stainless steel] [mild steel] plate
                      gasketted and bolted to steel angle as used in flanged joint.
              .9      .9       Provide 12-gauge black iron breaching all welded for oil fired equipment
                      with connections and supports to code requirements.
              .10     .10      Chimney and breechings shall be installed complete with all supports,
                      flashings, rain caps, thimbles, etc., in size as shown complete to meet
                      requirements of Authorities having jurisdiction.

         .1    Provide cabinet mounted fans with single or double forward curve double inlet fans with
               insulated heavy gauge enamelled steel cabinet with enclosed motor, pulleys and belts.
         .2    Drive pulley to be variable pitch.
         .3    Support on spring isolators from building structure.

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University of Manitoba                  AIR DISTRIBUTION                                          Section 15800

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         .4      Provide all required support members.
         .5      See fan chart for operating characteristics and any deviations from the above.

         .1     Twin or single blower, acoustic lined cabinet, complete with inlet grille where shown and
                disconnect switch or receptacle, and back draft dampers.
         .2     See fan chart for operating characteristics and any deviations from the above.

         .1    Provide as indicated on the drawings and in the equipment schedules, statically and
               dynamically balanced, constructed in conformance with AMCA 2408-69 and carrying the
               AMCA seal.
         .2    Bearings: Roof and sidewall domed type small utility fans etc.: Sealed permanently
               lubricated ball bearing. Belted ventilating sets and Class I and Class II. Fans: Heavy-
               duty ball bearings, 200,000-hour bearings with grease extensions where applicable, grease
               lubricated self-aligning pillow block. On arrangement III single inlet fans with ducted
               inlets, provide extended lubrication fittings.
         .3    Provide electric motors, vibration isolators, variable pitch drives, inlet screen, belts, belt
               guards, weatherhoods where mounted outdoors and back draft dampers on exhaust
               fans. Provide integral bases on floor mounted Class I and Class II fans.
         .4    Provide fixed pitch drive sheaves on fans greater than 5.6 kW (7.5 HP). Provide two sets
               of sheaves; one set to provide specified RPM and another set as specified by the air
               balance firm should field testing make this necessary.
         .5    Belt Guards: Provide expanded metal type with 25mm (1") dia. tachometer openings at
               both fan and motor shaft locations. Provide one opening with adjustable plate to
               compensate for motor position adjustment.
         .6    On fans for variable air volume duty, provide variable inlet vanes with factory installed
               linkages and with [pneumatic industrial type actuators suitable for 100 kPa (15 psi)
               control air pressure and 20 to 100 kPa (3 to 15 psi) pilot signal to actuator mounted pilot
               positioner.] [Electric/electronic actuators compatible with DDC system provided by
               Section 15900 Subcontractor.]
         .7    See fan chart for operating characteristics and any deviations from the above.

         .1    Provide infinite speed solid-state controlled down blow propeller fans with 1400-mm (56")
               diameter fan, discharging 8000 l/s (16,000 cfm) at high speed at 670 rpm. Refer to drawing
               for number of fans and control points.
         .2    Provide angle iron and finished expanded metal enclosure with hinged and latched access
         .3    See fan chart for operating characteristics and any deviations from the above.

 2.8     DRIP PANS
         .1     Drip pans shall be constructed of galvanized iron one gauge heavier than indicated in duct
                gauge schedule, with all joints soldered. Line inside with two coats of mastic and insulate
         .2     Pans shall have 50 mm (2") high sides and shall be 150 mm (6") larger in both directions
                than the size of the device or opening requiring the pan.
         .3     Where shown on the plans provide soldered drain fitting and local drain fitting and local drain
                line in size indicated.

 2.9     DUCTWORK
         .1   Provide rectangular and round ductwork constructed of galvanized steel sheets as
              follows as a minimum but not less than required by SMACNA HVAC Duct Construction

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University of Manitoba                     AIR DISTRIBUTION                                             Section 15800

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              TYPE               MAXIMUM              GAUGE         JOINTS

              Round spiral       450 mm               26            Slip joint with 3#8 screws evenly
              4 ply seam         (18")                              spaced.
                                 457 to 750 mm        24            Slip joint held with 3#8 screws evenly
                                 (19" to 30")                       spaced.
              Rectangular        Up to 300 mm         26            S & drive
              with Pittsburgh    (12")

              Longitudinal       325 to 750 mm        24            S & drive
              seam               (13" to 30")
                                 775 to 1275 mm       22            25 mm (1") bar slip or standing T @
                                 (31" to 50")                       1500 mm (60") o/c. maximum.
                                 1300 to 1500         20            As above with 40 mm (1½") bar slip
                                 mm                                 or standing T.
                                 (51" to 60")
                                 1525 to 2250         18            As above except provide 40 mm x 40
                                 mm                                 mm x 5 mm (1½" x 1½" x 3/16")
                                 (61" to 88")                       angle reinforcement at 750 mm (30")

         .2          Cross-break all ductwork greater than 300mm (12").
         .3          Duct sizes shown shall be the inside clear dimension.
         .4          Drier exhaust ducts: Provide aluminum ductwork with all joints and connections sealed.
         .5          Button lock longitudinal seam may be used provided seam is sealed or caulked with high
                     velocity duct sealer.
         .6          Shower room exhaust ductwork: Where indicated on drawings one gauge lighter than
                     listed above constructed of 316 stainless steel. Use stainless steel screws on any
                     fastenings and stainless steel hangers.
         .7          Fume hood exhaust ductwork: One gauge heavier than standard ductwork and
                     constructed of 316 stainless steel. Ducting to be all welded construction. Use only
                     stainless steel screws on any fastenings and stainless steel hangers.
         .8          Flammable storage cabinet exhaust ductwork: One gauge heavier than standard
                     ductwork and constructed of 316 stainless steel. Ducting to be all welded construction.
                     Use only stainless steel screws on any fastenings and stainless steel hangers.
         .9          Spin-on type connections from main trunk to VAV terminals may be used. Provide
                     balancing dampers for all connections to ceiling diffusers.
         .10         In place of previously specified duct joints, "Nexus" or "Ductmate" gasketed flanges may
                     be used provided gasketing meets approval of ULC and installation is to SMACNA
         .11         Kitchen Exhaust:
                     .1       Exposed ductwork to be 16 gauge stainless steel all welded construction with
                              gasketted and bolted access doors at each change in direction or 3 M (10'-0") o/c.
                              to current N.F.P.A. standard.
                     .2       Concealed ductwork to be 16 gauge black iron all welded construction with
                              gasketted and bolted access doors at each change in direction or 3 M (10'-0") o/c.
                              to current N.F.P.A. standard.
                     .3       Clean-out openings: 200mm x 300mm (10" x 12") framed on the side of the duct
                              using 25mm x 25mm (1" x 1") steel angle externally continuously welded with
                              cover all same gauge material as duct and with drillings at corners and at 100mm
                              (4") on centre on sides.

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University of Manitoba                   AIR DISTRIBUTION                                       Section 15800

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                 .4       Use only stainless steel ductwork, hangers, and supports where installation is
                          exposed in the interior of the building.
                 .5       Duct Hangers: 16 ga. mild steel straps 25mm (1") wide. 25mm x 25mm (1" x 1")
                          16 ga. angles for support of risers.
         .12     Internal Insulation of air handling casings is specified in Section 15180.
                 .1       Refer to detail drawings regarding air handling unit plenum access doors, drip trays,
                          and coil mounting.
         .13     Internal Insulation of air handling casings is specified in Section 15180.
                 .1       Refer to detail drawings regarding air handling unit plenum access doors, drip trays,
                          and coil mounting.
         .14     Flexible Ductwork
                 .1       Flexible connections shall be provided at connections to ALL moving equipment.
                 .2       Flexible ductwork: provide where indicated on the drawings Thermoflex M-KC
                          vinyl covered spring.
                 .3       Flexible air ducts shall conform to UL-181 Standard and NFPA 90A. Flexible air
                          ducts shall have a fire rating of at least one-half hour as measured by UL-181
                          Standard, paragraph No. 7, Flame Penetration Test.
                 .4       Do not restrict duct free area. Attach with galvanized wire hose clamps and Duro-
                          Dyne S-2 duct sealer. Connections to operate at 10” W.C. without leakage or
                 .5       Maximum length of flexible duct to be 1500 mm (5‟–0”).

 2.10    DUST SYSTEM
         .1    Supply and install a complete dust collection system as indicated and specified herein.
         .2    Dust System: This system shall be constructed of galvanized iron and shall be free from any
               obstructions including burrs and the like. Generally, the system installation shall comply with
               the following:
               .1       Up to 200 mm in the largest dimension - 0.85-mm.
               .2       225 mm to 450 mm in the largest dimension - 1.0 mm.
               .3       475 mm to 750 mm in the largest dimension - 1.3 mm.
               .4       All joints shall be compression fit type with 25-mm lap up to and including 450-mm
                        diameter ducts and 32 mm laps for ducts of 475 mm in diameter and over.
               .5       All elbows shall have radii equal to two duct diameters and shall be one gauge
                        heavier than the connecting straight sections. Elbows 150 mm in diameter and
                        smaller shall be five section elbows and ducts over 150 mm in diameter shall be 7
                        sections. Prefabricated elbows of smooth construction may be used in lieu of the
               .6       High-pressure flexible connections at fan inlet and outlet.
               .7       Transitions not to be less than 125 mm of run for each 25 mm change in diameter.
               .8       No two branch ducts may connect to the main at the same point.
               .9       A minimum of 300 mm of straight duct shall be installed between any two increases
                        or connectors.
               .10      Connections shall be made at a 30-degree angle.
               .11      Provide dead end caps within 150 mm of the end of each main.
               .12      Each branch line shall have a blast gate type of balance damper with locking pins.
                        Blast gates shall be installed within one meter of the main duct connection and shall
                        be on the horizontal section of the duct with the gate opening in the vertical position.
                         Blast gates shall be locked in a permanent manner after balancing.
               .13      Install cleanouts at low points where accumulation may cause blockage. Cleanout
                        doors shall be slide types with lock. Where the duct may be readily removed from
                        the equipment served, the cleanout may be omitted. Cleanout doors shall be
                        installed at each change in direction in the main ducts and generally at 3 meters on
               .14      All plenums, hoods and the like shall be constructed of galvanized iron two gauge
                        heavier than the connecting duct unless specifically noted otherwise.
               .15      Collector - The dust collector shall be high efficiency bag type with the following

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University of Manitoba                  AIR DISTRIBUTION                                      Section 15800

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                         features and capacities.
                         .1      l/s (cfm) at 00 mm (inches) w.c. total static pressure (includes filter
                         .2      Blower assembly, ( ) kW (hp) totally enclosed motor, and drives.
                         .3      Automatic shaker and control centre.
                         .4      Complete filter assembly, filters and one spare filter cartridge.
                         .5      Barrel adapters and barrels (one barrel for each connection).
                         .6      Stand extension for barrels.
                         .7      Explosion vent.
                         .8      Plenum silencer.
                         .9      Totally enclosed motor.
                         .10     External belt drives as required.
                         .11     This unit shall be an AAF ( ) Arrestall unit or approved equal.

 2.11    FABRIC DUCT
         .1    Fabric duct shall be half-round fabric ducting with a sewn-in bottom in one end and open
               the other end for connection to steel ductwork with stainless steel snapband.
         .2    Manufacturer shall supply a fabric transition to go from 200mm (8”) diameter sheet metal
               to the D-200 (8”) half-round fabric.
         .3    Maximum outlet speed of each individual duct is 0.12 m/s.
         .4    Fabric duct shall comply with UL25/50 Flame spread/smoke requirements of NFPA 90-A
               and shall be UL rated.
         .5    Fabric duct shall be made of 100% flame retardant non-coated permeable polyester.
         .6    Fabric weight shall be minimum 300 g/m .
         .7    Operating design temperature shall be at least 0°F to 180°F.
         .8    Operating design pressure shall be minimum 66 Pa ESP and maximum 100 Pa ESP.
         .9    Fabric duct shall come with an aluminium Wing-rail suspension system.
         .10   Ducts shall connect together using concealed zippers designed for easy disassembly and
         .11   Colour shall be manufacturer‟s standard colour 9002 White.

         .1    Provide, as shown on drawings and specified in Equipment Schedules, normally open direct
               acting pressure independent constant volume, parallel fan powered terminals with variable
               primary air volume. Terminals as manufactured by E.H. Price (Series FDV 5000).
               Equivalent fan powered terminals as manufactured by Enviro-Tec, Tuttle & Bailey, Titus or
               Nailor Industries will be accepted.
               Provide all required modifications to primary air inlet duct geometry to suit particular unit
         .2    Factory mounted terminal unit controllers and damper actuators are specified in Section
         .3    Mounting responsibility: terminal unit Manufacturer to take delivery of and install components
               supplied by Section 15900 Subtrade.
         .4    All required mounting and wiring of terminal unit components supplied by Section 15900
               Subtrade to be provided by terminal unit Manufacturer. Terminal unit Manufacturer to
               provide fan relay and power transformer.
         .5    Provide sound data (NC levels) for both transmitted and radiated noise for pressures ranging
               up to 4” w.g. All terminal units to be selected and attenuated for NC30 or less.
         .6    The assembly casing to be constructed as follows:
               .1       22 ga. casing (zinc coated steel construction) with integral turned-in flanges to
                        capture exposed edges of insulation on return air plenum inlet;
               .2       Removable bottom access panel to access the interior of the unit for motor servicing
                        and removal, cleaning and inspection.
               .3       Casing: fully lined with 20mm (3/4”) dual density insulation (which complies with
                        UL181 and NFPA90A) and faced with aluminum foil/reinforced Kraft vapour and air

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University of Manitoba                  AIR DISTRIBUTION                                         Section 15800

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                 .4        Metal filter frame: on plenum opening to fan compartment. Filters to be 25mm (1”)
                           thick disposable media in permanent reusable metal frames.
         .7      Airflow sensor: provided by terminal unit Manufacturer, of a multi-point, multi-axis flow ring
                 or cross sensor having a minimum of twelve pickup points designed to average the airflow
                 across the inlet of the assembly. Single point or flow bar sensors are not acceptable.
                 Sensor, mounted at 1.5 duct diameters straight duct upstream of unit, to maintain airflow to
                 within  5% of rated unit airflow setpoint
         .8      Controller to operate the electric damper actuator through full-catalogued air volume range
                 without changing orifices or other parts.
         .9      Air distribution assembly to be designed, installed and field adjusted, if necessary, to
                 maintain controlled pressure independent airflow. For optimum performance, installed units
                 to be provided with a minimum of four duct diameters of straight inlet duct, same size as the
                 inlet, between the inlet and any takeoff, transition or fitting. Also to be provided:
                 .1        External taps for air balancing instruments.
                 .2        Adjustable flow settings at the controller.
         .10     Terminal units to be factory set to 50% minimum air flow position unless noted otherwise on
                 drawings. This percentage to be field adjustable.
         .11     All primary control components to be mounted inside a protective metal shroud.
         .12     Damper to be 18 gauge metal minimum, with peripheral gasket, pivoted in self-lubricating
                 bearings. In fully closed position, air leakage past the closed damper not to exceed 2% of
                 the nominal catalogue rating at 3” inlet static pressure, as rated by Air Diffusion Council test
         .13     Fans to be forward curved centrifugal type, with direct drive 110V split capacitor type motors.
                 Unit to be provided with a manual solid state speed controller for adjustment of fan speed.
                 Fan and motor assembly to be internally suspended and isolated from the casing on rubber-
                 in-shear isolators. All motors to be permanently lubricated. Access to be provided through a
                 removable access panel in the bottom panel of the fan terminal assembly.
         .14     All fan controls to be enclosed in a single control box with an access panel mounted on the
                 side of assembly. All controls to be sealed from primary airflow.
         .15     Unit to be CSA certified.
         .16     Unit Manufacturer to provide unit mounted electrical disconnect switch.
         .17     Fan powered terminal controllers to have features and capabilities as specified in Section

         .1     All air systems shall be provided with filter sections to clean the air and protect system
         .2     Filter installations shall include prefilters to keep system components clean and final
                filters for supply air systems to ensure ventilation air cleanliness.
         .3     Filters rows shall have separate holding frames with side access properly sized in
                accordance with the filter Manufacturer's guidelines. Installation shall permit easy
                removal of all filters for filter replacement.
         .4     Each prefilter and final filter bank shall be provided with an individual Dwyer 2000
                magnehelic filter differential pressure gauge (this will require 2 gauges) each with „clean‟
                and „loaded‟ setpoints clearly marked.
         .5     Multiple filter sections shall be provided with manufactured I-channels between horizontal
                filters for airtight installation.
         .6     Prefilter: 150mm (6") to 300mm (12”) thick disposable-type filter acceptable to the
                University of Manitoba. At minimum, prefilters shall meet MERV 11 (Minimum Efficiency
                Reporting Value) performance level of 60%-65% dust spot and 90% arrestance rated to
                ASHRAE L-11.
         .7     Final filters: 300mm (12”) thick disposable-type acceptable to the University of Manitoba.
                At minimum, final filters shall meet MERV 13 performance level of 80%-90% dust spot
                and 98% arrestance rated to ASHRAE H-13.
         .8     HEPA filters are to be high capacity gasket seal and 99.97% efficient. Provide 16-gauge
                galvanized steel holding frame complete with clamps.

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         .9      Maximum face velocity for any filter bank to be 2.5 m/s (500 fpm).
         .10     For face access filters, provide holding frame: Factory fabricated 16 ga. galvanized steel
                 with gaskets and four spring type positive sealing fasteners per unit. Fasteners to be
                 attachable and removable without use of tools.
         .11     For slide-out filter removal and replacement, provide a hinged (continuous piano hinge)
                 and cam latched access door of sufficient size to allow easy withdrawal and replacement
                 of filters. Provide access door where there is adequate space to service filters.
         .12     Provide filter banks for duct-mounted coils outside of air units (heat reclaim, etc.)
                 consisting of framed units field assembled. Note: reheat coils do not require filters.
                 .1        Filters: 50mm (2") thick disposable MERV7 prefilters acceptable to the University
                           of Manitoba.
                 .2        Max. Face Velocity 2.54 m/s (500 ft. /min.).
                 .3        Holding Frame: 16 ga. galvanized steel channels for slide - out operation.
                 .4        Provide access doors upstream and downstream of coil/filter installation - refer to
                           detail drawings.
                 .5        For filter removal and replacement, provide a hinged (continuous piano hinge)
                           and cam latched access door of sufficient size to allow easy withdrawal and
                           replacement of filters.
         .13     Provide filter banks for ventilation air intakes for electrical rooms and similar installations
                 such as elevator, generator, transformer rooms, etc. to ensure a clean air supply to the
                 room. Installation shall consist of framed units field assembled.
                 .1        Filters: 50mm (2") thick disposable prefilters acceptable to the University of
                 .2        Maximum face velocity 2.54 m/s (500 ft. /min.).
                 .3        For face access filters, provide holding frame: Factory fabricated 16 gauge
                           galvanized steel with gaskets and four spring type positive sealing fasteners per
                           filter - fasteners to be attachable and removable without use of tools.

         .1     Provide individual magnehelic differential pressure gauges across each prefilter, each filter
                and each final filter bank installation on this project (one gauge per bank).
         .2     Gauges to be equal to Dwyer Series 2000 115mm (4½“) face diameter with suitable range –
                typically 0 to 2" (0 to 50 mm)
         .3     Magnehelic gauge to be provided with air filter gauge accessory fittings.
         .4     Filter “clean” and “loaded” pressure points to be indicated on the magnehelic to indicate
                clean condition as well as when filters should be changed.
         .5     Differential pressure gauges using liquids are not permitted on this project.

         .1     Provide ULC labelled and listed type "B" or "C" gravity or spring type dampers. Use type
                "A" only where mounted directly behind supply or return grilles.
         .2     Provide fire dampers in sizes and in arrangements to suit openings shown on the
                drawings to ULC requirements as they relate to maximum sizes permissible in the
                applicable fire separation construction. Where installed in metal studs walls, comply with
                ULC requirements and advise other affected Trades i.e. stud and drywall installers.
         .3     Do not use asbestos in any fire damper.
         .4     CK2000 thermal blanket along with required transitions shall be used for all ceiling
                diffuser protection.

         .1     Provide where shown on the drawings and where required to maintain separations,
                combination fire/smoke dampers meeting ULC/UL, NBC and NFA requirements. All
                damper units to be equipped with linkages for mounting of actuators for smoke control
                operation, fusible links for fire damper mode and micro switches for status signal (open
                and closed). Provide all required electric actuators.
         .2     Coordinate electrical requirements with Division 16.

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University of Manitoba                AIR DISTRIBUTION                                   Section 15800

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         .1    General HVAC System: provide at connections to fans and at air handling units,
               neoprene coated glass fabric, factory fabricated, flexible connections, as approved by
               Authorities and the University of Manitoba.
         .2    Except where noted, otherwise connections up to 750 mm (30") in the largest dimension
               shall be 100 mm (4"). Connections larger than 750 mm (30") to be 150 mm (6").

         .1    Partial stainless steel extractor arm with two 125mm (5”) diameter stainless steel tubes,
               three 125mm (5”) flexible polyethylene hoses, 4m (14”) working radius, 300mm (12”)
               diameter stainless steel hood with handle and external support. Provide epoxy coated 2.2m
               (7.2”) floor stanchion and 1.2m (4‟) extension arm.
         .2    Design based on PlymoVent MultiSmart Arm MSAS-125-4, SAES-125-4 extension and PA-
               220 floor stanchion.

         .1    Specific requirements for laboratory and industrial exhaust systems shall be reviewed
               with the Consultant and the University Environmental Health and Safety Office.
         .2    Fume hood exhaust systems shall be designed in accordance with the latest editions of
               American Conference of Governmental Industrial Hygienists (ACGIH) and ANSI
               Laboratory Exhaust Standards Z9.5 and Z316.5, and the University of Manitoba
               Controlled Products Standard (CPS).
         .3    All systems shall have an adequate supply of make-up air tempered to room
               temperature. Maintain laboratory negative pressure relative to adjacent corridor using
               volume tracking technique complete with static pressure reset. Measure supply and
               exhaust volumes. Maintain supply volume suitably less than exhaust volume to maintain
               laboratory static pressure of - 0.05” W.C. relative to adjacent corridor. Temperature
               control of the space shall not depend on exhaust air bypass through the hood.
         .4    A specialized hood, exhaust duct wash-down and duct system shall be provided where
               Perchloric acid of concentration higher than 72% is used or heating, evaporation or
               digestion of Perchloric acid is performed. Hoods should be located as close to the
               outside of the building as possible and have stainless steel fans. The dedicated duct
               system shall have few, if any, horizontal runs and no dead areas that can capture and
               condense Perchloric acid. Refer to University of Manitoba document “Safety
               Requirements For Perchloric Acid Fume Hoods" - April 4, 2003. Perchloric acid hoods
               shall be constructed of stainless steel (Type 316) and have welded seams throughout.
               No taped seams or joints and no putties or sealers can be used in the fabrication of the
               entire hood and duct systems.
         .5    Fume hood exhaust fans shall have acid-resistant coating; two coats air-dried "Heresite"
               or equal. Design static shall not be less than 1-in. static pressure. Spark resistance is
               required for explosive atmospheres. Where design conditions do not permit the use of
               coatings, requirements shall be discussed with the Consultant.
         .6    Exhaust fans serving fume hoods shall be located at the discharge end of the system to
               minimize the amount of positively pressurized ductwork.
         .7    Exhaust fans shall discharge at a sufficient height above the roof level to provide safe
               discharge and dilution of hazardous chemicals, as outlined in "Airflow Around Buildings,"
               in the latest edition of the ASHRAE Fundamentals Handbook. Exit velocity shall be 3,000
               fpm (minimum).
         .8    Duct systems and fans serving hoods used with combustible materials shall be of spark-
               proof construction and shall not be PVC coated. The exhaust ducting shall be grounded
               to dissipate any static electricity. Fume hood exhaust ductwork shall be Type 316
               stainless steel with welded joints.
         .9    Hoods, fans, and discharges shall be tagged for type of service and fume hoods shall be
               tagged with a fan service tag.
         .10   Exhaust fans and ductwork handling toxic fumes and/or radioisotopes shall have an

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Req #                                                                                            Page 10

                 appropriate self-adhering CAUTION sticker attached. For hoods where radioisotopes are
                 used, extra labeling requirements as stated in the CPS shall be complied with.
         .11     All laboratory hoods and safety cabinets shall be equipped with visual and audible alarms
                 to warn laboratory workers of unsafe airflows.
         .12     Controls and dampers shall be of a type that, in the event of failure, will fail open to
                 assure continuous draft.
         .13     In accordance with NFPA Standard 45, automatic fire dampers shall not be used in
                 laboratory hood exhaust systems. Fire detection and alarm systems shall not be
                 interlocked to automatically shut down laboratory hood exhaust fans.
         .14     Auxiliary air supply and ductless laboratory fume hoods shall not be used.
         .15     All fume hood and local exhaust system ducts shall be constructed of round ductwork
                 with interior of all ducts smooth and free of obstructions.
         .16     All fume hoods, except for radioactive and Perchloric acid fume hoods, shall be
                 connected to a central exhaust manifold. The exhaust manifold, exhaust fans, and
                 bypass damper shall be located above the roof. The system shall be exhausted via
                 multiple exhaust fans and provide for redundancy. The fans shall be staged to maintain
                 suitable negative pressures in the manifold. The bypass damper shall automatically
                 modulate to maintain duct static pressure setpoint.
         .17     Alarm lights and horns shall provide local alarm annunciation upon loss of negative
                 system pressure. Independent Dwyer Photohelic pressure switches shall monitor duct
                 pressure at multiple locations and provide remote alarm annunciation to Campus Security
                 Central Station.

 2.20    FUME HOODS
         .1    New laboratory fume hoods shall be standard products from a Manufacturer acceptable
               to the laboratory / Physical Plant / EHSO. All laboratory fume hood designs must
               demonstrate containment of tracer gas less than 4.0 AM 0.05 according to ASHRAE Test
               Standard 110-1995.
         .2    Laboratory fume hoods shall be a constant volume design of the size and with the
               accessories as noted below and on the drawings.
         .3    Exhaust duct connection collar to be 316 stainless steel to allow unit to be connected to
               316 stainless steel exhaust system
         .4    Maximum hood pressure drop from inlet to discharge collar shall not exceed 0.10"wg.
         .5    Operating face velocities of fume hoods shall conform to the levels stated in the
               University of Manitoba CPS. Operating face velocity of a fume hood shall be a minimum
               of 80 feet per minute (fpm) and a maximum of 120 fpm at a sash height of 11 inches.
         .6    Laboratory hood performance controls and alarms shall be factory installed and field
               calibrated. Alarm points to be set at 65 linear feet per minute (LFPM) and 125 LFPM.
               Alarms must warn users of potential fume spillage before the event. Warning after the
               event is not acceptable.
         .7    Unless specifically requested otherwise by a user, the laboratory fume hoods shall have
               transparent, movable, vertical-rising sashes constructed of shatter resistant and flame
               resistant material, and be capable of closing the entire front face.
         .8    Proper operation of laboratory fume hoods shall be demonstrated by an independent
               qualified test contractor prior to project closeout. Test results shall be forwarded to
               EHSO. Proper operation includes acceptable face velocities at operational sash height in
               compliance with the University of Manitoba CPS.
         .9    Laboratory fume hood controls shall automatically modulate internal baffles to establish
               and maintain a bi-stable vortex within the hood. Controls to be variable face velocity
               (VFV) system complete with local hood alert module, vortex pressure sensor, stand-alone
               automatic baffle position controller, damper actuator, air flow sensor, and linear trim
               balancing/shut-off damper. For Flow Safe, Air Sentry type fume hoods, interior
               dimensions and vortex chamber to be sized to generate and support a bi-stable vortex.
         .10   Laboratory fume hoods connected to manifold exhaust systems shall be provided with
               volume control systems. Refer to Section 15900 for further control details.

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         .1    Round Ductwork
               .1     Sizes up to 900mm (36”) to be zinc-coated steel strip, spiral conduit or round.
               .2     Construct spiral sizes:
                      a.       Up to 200mm (8”) of 0.50mm (#26 ga.) with ribs spaced 65mm (2 ½”) to
                               100mm (4”) apart.
                      b.       Sizes from 225mm (9”) to 600mm (24”) to be of 0.60mm (#24 ga.) with
                               ribs spaces 150mm (6”) apart.
                      c.       Sizes 650mm (26”) to 900mm (36”) of 0.80mm (#22 ga.) with ribs spaced
                               150mm (6”) apart.
               .3     Round duct to have grooved longitudinal seams with continuous weld.
               .4     Sections to be joined by 200mm (8”) coupling sleeves.
               .5     Fittings to be manufactured by United. All tees shall be conical.
               .6     Balancing dampers, where noted and where required for balancing, to be
                      butterfly-type with Duro-Dyne heavy-duty hardware. Damper blades to be 1.2mm
                      (18ga.) perforated plate.
               .7     Construct spiral sizes:
                               Diameter               Gauge (USSG)
                               Up to 10”                   24
                               11” to 20”                  22
                               21” to 40”                  20
                               41” to 60”                  18
                               61” and over                16

         .1    E.H. Price SHVR, single duct, variable volume air distribution assemblies of sizes and
               capacities shown, with performance as per Catalogue F-1, latest issue.
         .2    Box housing constructed of galvanized steel.             Sealed and gasketed, leakproof
               construction. Damper shall operate in rustproof Delrin, self-lubricating bearings. Damper
               leakage shall not excess 3% at 1,495 Pa (6" S.P.), as rated by Air Diffusion Council
               standards. External mounted controller and operator shall be covered by galvanized
               shroud to protect from damage and vandalism. Inner valve casing shall have 25mm
               insulation, complying with U.L. 181 and NFPA 90A.
         .3    Each assembly shall be pressure independent; i.e., it shall provide air flow regulation
               within +/-.25m/s (50 fpm), regardless of duct pressure fluctuation, throughout its entire
               rated cfm range. Each assembly shall reset to any air flow between zero and maximum
               noted cfm. Assembly shall operate independent of duct pressure over a range of 75 Pa
               (0.3" W.G.) To 1,495 Pa (6" W.G.).
         .4    At an inlet velocity of 10.2m/s (2000 fpm) differential static pressure for any size shall not
               exceed 62 Pa (0.25") wg for basic assembly, or 137 Pa (0.55") with sound attenuator
         .5    Sound ratings shall not exceed ratings in catalogue.
         .6    All variable volume boxes shall have factory pre-set minimum position, but shall be
               capable of being field adjusted. Boxes shall be set for normally minimum operation and
               calibrated to deliver specified maximum cfm in response to proportioning thermostat.
         .7    Summer and winter min. positions shall be factory pre-set as noted on Variable Volume
               Box Schedule.
         .8    Air volume shall remain constant regardless of static pressure variations. Refer to C1.
               “Initial Balance of Operation of Air Systems”.
         .9    Section 15900 to supply controller, air flow sensor, reheat E/P transducer to factory for
         .10   Electric actuator furnished by Section 15900 and factory mounted by VAV Manufacturer.
         .11   Room thermostat and CO2 sensor provided by Section 15900.
         .12   Section 15900 to supply On/Off Reheat Interface, factory installed to terminal unit where
               indicated on schedule.
         .13   Manufacturer shall co-operate with Section 15900 to ensure all control sequences of

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Req #                                                                                             Page 12

                 operation, min. and maximum settings are compatible, and all necessary components are
                 provided to ensure proper operation of all assemblies.
         .14     Refer to Variable Volume Box Schedule and Section 15900 for further requirements.

         .1    Provide fans to meet NFPA and ULC requirements complete with NFPA and ULC approved
               roof curbs.
         .2    Supply and install non-overloading type centrifugal up blast exhaust fan with steel or
               aluminum enclosure, back draft damper, pulleys, belts and motor.
         .3    Fan discharge shall be 1000 mm (40") above roof.
         .4    Supply and install centrifugal backward curve SISW fan with weatherproof motor and drive
               enclosure, motor, drives, belts, and BDD cleanout door and drain to discharge 0000 cfm at
               000 s.p. when driven by a 0000 Hp motor.
         .5    Standard of Acceptance: Chicago Blower belted vent set model (       ) or (    ) approved

 2.24    LOUVRES
         .1   Supply and install aluminum louvres.
         .2   Louvres shall be 100 mm (4") deep with 30-degree blades at 75 mm (3") o/c. and
              constructed of 12 gauge material and 16 gauge frame.
         .3   Provide 12 mm (½") square 16 gauge aluminum removable bird screen with 50%
              minimum free area.
         .4   Provide sill or frame as required.
         .5   Louvres shall be equal to Aerolite Model K630X.

         .1   All apparatus sheet metal connections, plenum chambers and casings above 400mm
              (16") in height, or air handling unit casings: 18 gauge galvanized steel reinforced with
              40mm x 40mm x 5mm (12" x 12" x 3/16") galvanized angle. [Galvanized fluted 0.76mm
              (.03") thick roof decking with a 38mm (12") deep and 142mm (5.6") wide ribs
              spaced at a 203mm (8") oc may also be used.] [See detail drawings.]
         .2    [Internal Insulation of air handling casings is specified in Section 15180.]
         .3   Refer to detail drawings regarding air handling unit plenum access doors, drip trays and
              coil mounting, construction details.
         .4   Special prefabricated enclosures: Provide in the configurations and dimensions shown on
              the drawings, built-up system enclosures constructed of prefabricated acoustic panels
              complete with access doors:
              .1       Panels: 100mm (4") nominal thickness consisting of 72 kg/m; (4.5 lbs/ft;) density
                       insulation packed between 18 ga. galvanized steel outer shell and 22 ga.
                       galvanized perforated steel inner shell, reinforced by 10 ga. galvanized steel
                       channels spot welded or riveted in place. Panel joints: Interlocking tongue and
                       groove design. Trim angles: 16 ga. galvanized steel.
              .2       Doors: 600mm x 1500mm (24" x 60") located as shown on the drawings
                       constructed in the same manner as the panels except with solid sheets both
                       sides, and complete with two butt hinges, two camlocking latches operable from
                       inside and outside and single air seal. Door action: To swing open against
                       plenum pressure.

         .1    Ensure that the items supplied will be compatible with ceiling, floor, or wall construction.
         .2    Provide fire dampers where required to maintain fire separations and where indicated on the
               drawings. Fire dampers behind sidewall and floor grilles and registers to be VCS4/C, U.L.C.
               /W.H. rated for 1½ hours with screwdriver balance adjustment. Such dampers to replace
               standard balance dampers where specified.
         .3    Air extractors to be provided where indicated and where supply outlets are directly
               connected to ductwork serving multiple outlets: Extractors to be equal to:

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Req #                                                                                                  Page 13

                 .1      Rectangular - AE-1
                 .2      Round - VCR-6
         .4      Borders and/or frames to have countersunk screw holes. Slot or Phillips head countersunk
                 #8 sheet metal screws with finish to match border.
         .5      Supply, Return, Transfer, and Exhaust, grilles, registers and diffusers to be as follows:
                 .1      Lay-in supply air diffusers.
                         .1         PDS (PDHS for dropped lay-in tile ceiling) with 4-way adjustable pattern,
                                    24" x 24" ceiling module unless noted otherwise, and style 3 frame (4 for
                                    spline ceiling) with B-13 off-white finish.
                         .2         Flush supply diffusers.
                         .3         PDS/1, 4 way adjustable with diagonal grid placement unless noted
                                    otherwise; ceiling module to be twice each size shown; B-13 off-white
                 .2      Sidewall supply registers.
                         .1         C22S3AB15, ¾" double deflecting with short vanes in front, balance
                                    dampers, screw mounted and aluminum finish.
                 .3       Floor linear supply registers.
                         .1         LBPH 15A3-4370-B-CC-66; fine line linear with 0° deflection, ¼" spring,
                                    balance damper, 1¼" x 2" heavy-duty ledged floor frame, clip fastened, with
                                    aluminum finish.
                 .4       Ceiling return and transfer air grilles.
                         .1         C80 A B15; curved face border with ½" x ½" x ½" 0° deflection core screw
                                    fastened in aluminum finish for all non-ceiling module sizes.
                         .2         For ceiling module sizes (e.g. 24 x 24) provide CH 80 B15 for lay-in
                 .5      Sidewall and ceiling return air and transfer air grilles (standard duty).
                         .1         C70 LA B15 curved face border, 45° deflection, ½" spaced ¾" blades in
                                    short dimension, screw fastened, aluminum finish.
                 .6      Gymnasium Heavy Duty Sidewall Return Air Grilles where any portion of the grille is
                         within 8' - 0" of the floor.
                         .1         GG91 L/S A B15 curved face border, 45° deflection, _" spaced ½" blades in
                                    short dimension, screw fastened, aluminum finish. Blades to be horizontal.
                 .7      Sill return or transfer grilles.
                         .1         LBPH 15A-275-A-B-15; same as supply but less the damper.
                 .8      Floor return or transfer grilles.
                         .1         LBPH 15A-4370-B-B15; same as supply but less the damper.
                 .9      Exhaust registers.
                         .1         Exhaust registers to be the same as return air grilles but fitted with a
                 .10     Door grilles.
                         .1         STG 1BF B15; stamped steel with screwed frame both sides adjustable
                                    from 1_" to 2½" with ½" inverted V sight proof horizontal fixed blades in
                                    aluminum finish.
                 .11     Filter grilles.
                         .1         FF 70 L GQ B15; filter grille with flat face aluminum border, 45° deflection
                                    ½" spaced ¾" fixed bars in long dimension, 1" filter frame, quick release
                                    fasteners (hinged in sized under 36" x 24", and aluminum finish). Provide
                                    1" thick oil impregnated filter media. Back grille where indicated to be C70L
                                    transfer grille.

         .1    Centrifugal fan units, V belt or direct driven, with spun aluminium housings, complete with
               resilient mounted motor and fan, 12mm (½") mesh aluminium birdscreen, automatic
               gasketted backdraft dampers: disconnect switch within fan housing, continuous curb
               gaskets, stainless steel securing bolts and screws.

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Req #                                                                                               Page 14

         .1    Provide fans with heavy gauge enamelled steel enclosures, DIDW forward curve fan wheel
               with permanently lubricated bearings, hinged or bolt on (wing nuts) covers, for placement on
               fabricated roof curb.
         .2    Fans to have variable motor pulley, fan pulley, belts and motor on resilient adjustable mount.

         .1    As described on the drawings, provide rainproof roof mounted louvred aluminium alloy
               exhaust and intake assemblies complete with bird screens.

 2.30    SILENCERS
         .1    Only silencers with duct-to-reverberant room insertion ratings will be accepted.
         .2    Construction: 22 ga. galvanized steel outer shell, all welded, prefabricated, with 40 kg/m³
               (2½ lb. /ft³) density acoustic media packed under 10% compression and protected from air
               erosion by 22 ga. perforated galvanized steel liner, stream lined inlets and tapered diffuser
               outlets for maximum insertion loss and minimum pressure drop.

         .1    Dampers shall be installed in all branch ducts for balancing. All balancing shall be done
               with branch duct dampers and NOT with diffuser dampers.
         .2    Ducts whose smallest dimension is 200mm (8”) or greater shall have multi-leaf opposed
               blade volume dampers with manual quadrants calibrated to show the position of the
               damper. Damper blade widths shall not exceed 150mm (6”). Quadrants shall be oriented
               so that the handle is parallel to the direction of air flow, when the damper is wide open.
         .3    Construct quadrant dampers of not less than 22 gauge material. Where installed in ducts
               up to 300mm (12") deep, provide single blade, and in ducts greater than 300mm (12")
               provide multi-blade with linkages, each blade being not wider than 225mm (9").
         .4    Do not locate single blade volume dampers immediately behind diffusers and grilles.
               This application does not allow uniform airflow across the outlet face.
         .5    To minimize generated duct noise, locate volume dampers at least two duct diameters
               from a fitting and as far away as possible from the outlet or inlet.

         .1     Fans shall be SISW design with F.C. wheel, constructed of heavy gauge steel with
                enamelled finish, pulleys, belts, and motor on resilient adjustable mount. Motor pulley to be
                variable type.
         .2     Provide spring mounts and support fans at 4 points from structure.
         .3     Provide belt guards. Field fabricate if necessary.

         .1   Provide belt, direct driven or direct driven variable pitch in motion as indicated on the
              drawings and described in the equipment schedules, statically and dynamically balanced
              to maximum tolerance of 1 mil double amplitude at design operating speed and rated per
              AMCA Standard 210-74.
         .2   Housing: Hot rolled steel with integral flanges 4.76mm (3/16") thick for fans up to 965mm
              (38") ID; 6.4mm (3") for fans 1067mm (42") ID and larger; continuously welded,
              mechanically expanded concentric, sandblasted and painted all sides, minimum of eight
              4.76mm (3/16") thick stationary guide vanes and 12.7mm (2") thick steel motor support
              plate welded to housing.
         .3   Rotor hub and blades: Cast aluminium; 356-T6 alloy heat treated for hub and 356 alloy
              for airfoil blades with tip clearance of 1.27mm (0.050") for rotors up to 900mm (36") and
              not exceeding 4.57mm (0.180") for larger sizes.
         .4   Motors: With 200,000 hour ball bearings; Class B insulation for operation in 400C
              ambient; extended lubrication fittings, NEMA Standard TEFC suitable for vertical and
              angular position; conduit box with air tight conduit on direct drive units.
         .5   Supports: For horizontal or angular mounting; steel angles located on centre line of fan

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Req #                                                                                              Page 15

         .6      Capacity adjustments where specified as constant volume: Blades to be adjustable to
                 factory stamped graduations. Where specified variable volume; automatically controlled
                 infinitely variable through design pitch range with minimum hysteresis, individual holding
                 bearings for blades designed to not require periodic relubrication. Actuator; internal
                 factory mounted and connected pneumatic with positioner; to operate on 550 kPa (80
                 psig) air pressure and 20 to 103 kPa (3 to 15 psig) control pressure.
         .7      Provide as indicated in equipment schedules: inlet bells, outlet or inlet cones and
                 companion flanges. In plenum applications, fans to have inlet cone and screen.
         .8      Provide, to current AMCA Standards, performance curves and sound power level data
                 (PWL) re 10-12 watts for each of the 8 octave bands.
         .9      Provide factory mounted and calibrated annubar or acceptable alternative velocity
                 pressure sensors mounted in the fan inlet. Submit velocity pressure curves with shop
         .10     See fan chart and drawings for operating characteristics and any deviations from the above.

         .1    Provide as shown on the drawings and as detailed in the equipment schedules, [normally
               closed] [direct] [reverse] acting [by-pass type and] pressure independent variable [and
               constant] volume terminals.
         .2    Provide as shown on the drawings and as detailed in the equipment schedules, [normally
               closed] [direct] [reverse] acting [by-pass type and] pressure independent variable [and
               constant] volume terminals.
         .3    Provide control arrangement such that field adjustment of maximum and minimum air
               flow and field selection of normally closed or normally open mode is easily achieved.
         .4    Provide [pneumatic] [electric] actuators compatible with the characteristics of the central
               temperature control system. [Maximum control air requirement not to exceed .009 l/s at
               138 kPa (.02 cfm at 20 psi)].
         .5    Provide sound data (NC levels) for both transmitted and radiated noise for pressures
               ranging up to 1.0 kPa (4" wg). Discharge and radiated sound ratings not to exceed room
               noise rating as listed.
         .6    Provide sound attenuators on all VAV Terminals.
         .7    Interior lining is to be constructed of impermeable, cleanable, closed-cell liner materials
               such as Armacell or IMCOA EPFI ImcoSheet. Face-coated fiberglass insulation is not an
               acceptable product for any portion of ventilation systems including VAV boxes and
         .8    Provide reheat coils with access doors on both upstream and downstream side of coil.
         .9    Where terminals are designated "CAV", provide normally closed (100% shut-off) as
               above except set at constant volume as indicated.


         .1   Refer to Section 15050 for requirements for access doors.

         .1    Refer to Section 15990 – Testing and Balancing.
         .2    Provide personnel and materials to assist and work under direction of air balancing firm
               for removal and replacement of ceiling tiles, installation of pilot tube test opening
               enclosures, installation of dampers and baffles as required for specified air balance and
               elimination of stratification, provision of access openings and covers, provision of ladders
               and scaffolds, removal and replacement of guards, removal and replacement and
               provision of required sheave and belt sizes as directed and other items as necessary for
               complete and acceptable air balancing procedures.


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Req #                                                                                                  Page 16

         .1      The installation of the air-to-air heat exchangers must be executed with particular care.
         .2      The following are items of concern:
         .3      The exhaust air must enter the bottom part.
         .4      The drain must be at the warm end on the exhaust side.
                 .1       The unit must be graded 2% minimum and preferably 4% back to the drain end.
                 .2       All joints and connections must be made watertight.
                 .3       The ductwork on the exhaust air leaving side must be watertight.
                 .4       The insulation must be applied carefully ensuring continuity of the vapour seal.
                 .5       The condensate drain is to be insulated and vapour sealed.
                 .6       The trap in the condensate drain shall be 150 mm (6”) deep.
                 .7       Access doors must be double panel-insulated type carefully sealed.
                 .8       Where hangers or support members come in contract with the exchanger they shall
                          be insulated to a point 300mm (12”) from the contact point.
                 .9       Dented or damaged units will not be accepted.
                 .10      All duct connections shall slope up from the heat exchanger.
                 .11      Where the Manufacturer's installation instructions differ with that stated, such
                          instructions shall be brought to the attention of the Consultant.

 3.01    BAFFLES
         .1    .1     Provide baffles where required to reduce problems of air stratification, as directed by
               the Consultant.

         .1    Install ductwork in accordance with SMACNA Duct Construction Standards - Metal and
         .2    Do not suspend equipment, ductwork or devices from formed hollow metal decking.
         .3    Install balancing dampers at branch ducts.
         .4    Vibration isolation shall be provided for the following:
               .1        Vibration isolation shall be provided where there are flexible connections
                         between equipment and ductwork.
               .2        All high-pressure ducts (over 6 in. WC), for 20 ft from air handling equipment
                         mounted on vibration isolators.
         .5    Flexible ductwork: Maximum installed length: One continuous length at 1500 mm (5'-0").
               Use standard sheetmetal elbows at drop points to outlets.
         .6    Seal all transverse joints in supply, return and exhaust ductwork with Ductbond water-
               based high velocity duct sealer or equivalent meeting requirements of Authorities having
               jurisdiction and SMACNA Seal Class C - maximum leakage 5%. Above sealer not
               required in Nexus type joints except as may be specified in Manufacturers installation
         .7    Where interior of duct is visible through grilles, registers or diffusers, paint interior of duct
               with flat black Tremco paint formulated for galvanized surfaces.
         .8    Seal all exposed edges, perforations and joints in acoustic duct lining with Bakelite
               110-26 compound or high velocity duct sealer meeting Manufacturer‟s requirements.
         .9    Use Bakelite 230-38 adhesive, full coverage, for internal insulation.
         .10   Ductwork installed outdoors (not externally insulated): Seal all joints with paintable Silicon
               caulking compound.
         .11   Provide spin-on connections c/w dampers at each boot or plenum supplying integrated
               ceiling air supply outlets.
         .12   Hangers: Galvanized steel strap and steel angle with support rods, locking nuts and
               washers to the following table:

                                 Circular Duct Size (mm)*                           Angle Size (mm)
                   .1    Up to 600 (24") galvanized steel strap         25 x 20 ga. (1" x 20 ga.)
                   .2    625 to 1000 (25" to 40")                       40 x 40 x 3 (1½ " x 1½ " x 1/8")

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University of Manitoba                 AIR DISTRIBUTION                                       Section 15800

Req #                                                                                                Page 17

                   .3    1005 to 1500 (41" to 60")                    40 x 40 x 3 (1½" x 1 ½“ x 1/8")
                   .4    1505 to 2000 (61" to 80")                    50 x 50 x 3 (2" x 2" x 1/8")

                                      Rod Size (mm)                                  Spacing (mm)
                   .1    6 (1/4")                                     3000 (10')
                   .2    6 (1/4")                                     3000 (10')
                   .3    10 (3/8")                                    3000 (10')
                   .4    10 (3/8")                                    2300 (7' 6")

                 * Equivalent Rectangular Maximum Dimension

 1.6     FANS
         .1      Ensure vibration free installation.
         .2      Leave access for servicing.
         .3      Install belt guards and weatherproof covers as required.
         .4      On all vane axial fans, (mounted vertically or horizontally), provide steel support brackets
                 from floor or overhead with vibration isolators at centreline supports on fan - Do not place
                 isolators on floor or at overhead attachment point.
         .5      Secure snubbers to be parallel with the fan horizontal longitudinal axis.

         .1    Locate sensing points as directed by the Manufacturer.
         .2    Carefully clip tubing to avoid damage and interference with filter removal or servicing.
         .3    Mount gauges on the unit for convenient observation as directed by the Consultant.

         .1    Install to ULC requirements.
         .2    Locate in firewalls, ceilings, floors and partitions shown with fire ratings on Architectural
               drawings and details.
         .3    Seal around fire damper assembly.

 1.9     FLASHING
         .1    Provide flashings to suit installation.
         .2    Follow detail drawings for vents and pipes penetrating roofs.

         .1    Install flush and true with exterior wall surfaces.
         .2    Thoroughly caulk entire perimeter of louvre with acceptable material.
         .3    Where other Divisions specify louvres, this Contractor to make all required duct
         .4    Caulk all joints at louvre connection and make duct connection watertight.

         .1    Follow Manufacturer's recommendations for prefabricated components. Comply with
               requirements of Authorities. Provide a minimum of three 6mm (¼") stainless steel guy
               cables with turnbuckles on any vent (or stack) higher than 1500mm (5'-0") above roof.

 1.13    Where visible retaining fasteners are needed, install oval head plated screws in
         countersunk holes.
 1.14    Set squarely in place parallel to adjacent building lines.
 1.15    Ensure unit is compatible with ceiling or wall construction.
 1.16    Floor grilles to be set flush with floor coverings except carpet. Frame to lap over carpet.

                                             Revised April 1, 2011
University of Manitoba                  AIR DISTRIBUTION                                      Section 15800

Req #                                                                                               Page 18

 1.17    Ensure devices are set rigidly in place and properly secured.
 1.18    Make connections of rigid or flexible ductwork to diffusers, VAV terminals and air
         distribution boots using a minimum of 3 self tapping screws and seal with glass fab tape
         and high velocity duct sealer.

         .1    Drawings indicate general layout of ductwork. Additional offsets or changes in direction
               to be made at no extra cost to the University of Manitoba.
         .2    On round and spiral ductwork, outside sleeve surface and duct to be brushed with sealing
               compound before assembly. Place sheet metal screws on 200mm (8") centres, with
               three screws, each side of joint. After assembly, brush both joint and screws with sealing
               compound. Seal all duct seams, and joints between ducts, fillings, etc. with Duro-Dyne
               S-2 duct sealer and Duro-Dyne FT-2 fiberglass duct tape. Prior to installation ductwork to
               be clean, dry and free of grease. Apply duct sealer with a stiff brush or trowel. Wrap wet
               seam or joint with duct tape and apply further coat of duct sealer. Duct sealer and glass
               fiber to extend 25mm (1") on each side of joint or seam.
         .3    90º elbows to be 5-piece mitred construction. 200mm (8") diam. 90 deg. elbows or less
               can be solid 1-piece molded type. Use conical connections throughout installation.
         .4    Install flat oval ducts as per Manufacturer‟s published Bulletin F.O. #6. Brace with United
               truss couplings or angle flanges on four-foot centres. Use companion angle flanges
               when maximum width (major axis dimension) exceeds 650mm (26"). This bracing to limit
               wall deflection from static pressure to maximum of 10mm (.41") at 1.2 kPa (5") static
               pressure. Provide matched fittings. Install and seal as per requirements for round and
               spiral ductwork.

         .1   Install all automatic dampers free from distortion and binding of linkages.
         .2   Thoroughly caulk around frames.

         .1   Install hinged doors to swing outward on the suction side of the fan and inward where a
              positive pressure may exist in the plenum.
         .2   Provide gasketting around all doors and seal all seams and joints with high velocity duct
         .3   Construct coil mounting racks to ensure capability of future removal.
         .4   Provide two coats of mastic compound on inner surface of drip trays.
         .5   Seal all joints in filler pieces to prevent bypass and install filter banks for easy servicing.
         .6   Provide independently gasketted removable panels for access to coils and/or plenum
              exterior, provide split escutcheon plates with gasketting, securely screwed in place, at all
              points where panels are penetrated by piping and conduit.
         .7   Where fabricated panels are placed on masonry walls, provide 50mm (2") spacing to
              prevent vibration transmissions.

         .1    During installation protect open ends of ducts to prevent debris and dirt from entering.
         .2    Where ducts are shown along side of partitions, place tight to the surface.
         .3    Kitchen Exhaust Ductwork:
               .1      Do all work in accordance with NFPA 96.
               .2      Use gasket material at flanged connections rated at 1100C minimum.
               .3      Use 6mm (¼") bolts or studs at flanged connections and ensure a leaktight joint.
               .4      Provide hangers and vertical supports 1200mm (48") on centre.
               .5      Install horizontal sections level without dips or traps.
               .6      Provide access openings on the side of the duct at each change in direction with
                       the lower edge of the opening not less than 40mm (1½") above the bottom of the
               .7      Install all ductwork 450mm (18") clear of combustible construction and 150mm

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University of Manitoba                 AIR DISTRIBUTION                                     Section 15800

Req #                                                                                              Page 19

                         (6") clear of non-combustible construction.
                 .8      Ensure fan outlets are ducted to terminate 1000mm (40") minimum above the
                         roofline and be 3m (10') minimum from adjacent buildings, property lines, air
                         intakes and adjoining grade levels.

         .1    Outlets from test section to be sealed off.
         .2    Apply required test pressure. Use special testing fan.
         .3    Determine leakage with manometer and orifice plate in connection between fan and test
         .4    Test apparatus and method to be approved by Consultant.
         .5    Test ductwork at 1.5 kPa (6") W.G. Leakage not to exceed 1% of average operating air
               flow in section.
         .6    Notify Consultant one week in advance of when such tests are to take place.

         .1    Support independently of ductwork.
         .2    Do not install inlet ductwork in lengths less than that required by the Manufacturer.
         .3    Do not provide inlet ductwork less than 1500 mm (5 ft.) long.

         .1    Install ductwork free from pulsation, chatter, vibration or objectionable noises.
         .2    Should any of these defects appear after the system is in operation, correct problems by
               removing, replacing, or reinforcing the work as directed by the Consultant.

                                         END OF SECTION 15800

                                             Revised April 1, 2011