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                          OFPC Standard Specification


                                    SECTION 23 37 00.UT
                                  (previously Section 15936)

                                AIR OUTLETS AND INLETS

This Standard Specification Section is controlled by the Office of Facilities Planning and
Construction, The University of Texas System. It is to be used as guideline on all UT System
projects, unless deviations are approved in writing by the Project Manager. It is not to be used
for bidding, permitting, construction or any other purpose. This document is the property of UT
System, and use of this document, in part or in whole, for any purpose other than for a UT
System project may not be done without written permission of UT System.

To receive current updates of standard specification sections, please go to the OFPC Intranet web
site at: www.utsystem.edu/fpc or contact the Office of Facilities Planning and Construction.

The issuance and revision history of this section is tabulated below. Please destroy any previous
copy in your possession.

       Rev No.             Date                              Remarks
          0           December 1992                           Original
          1              May 2004                      Revised Cover Page
          2            January 2006          Revised Specification Numbers (CSI 2004)




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                                      SECTION 23 37 00
                                  (previously Section 15936)

                                 AIR OUTLETS AND INLETS


PART 1      GENERAL

1.01   WORK INCLUDED

       A.   Diffusers.

       B.   Diffuser boots.

       C.   Registers/grilles.

       D.   Door grilles.

       E.   Louvers.

       F.   Louvered penthouses.

       G.   Roof hoods.

       H.   Goosenecks.

1.02   RELATED WORK

       A.   Section [_____-__________]: Door louvers.

       B.   Section [_____-__________]: Metal wall louvers.

       C.   Section 09 91 00 - Painting: Painting of ductwork visible behind outlets and inlets.

       A.   Section 23 00 00.UT - Basic Mechanical Requirements.

       A.   Section 23 31 00.UT - Ductwork.

       A.   Section 23 33 00.UT - Ductwork Accessories.

1.03   REFERENCES

       A.   ADC 1062 - Certification, Rating and Test Manual.

       B.   AMCA 500 - Test Method for Louvers, Dampers and Shutters.


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       C.     ANSI/NFPA 90A - Installation of Air Conditioning and Ventilating Systems.

       D.     ARI 650 - Air Outlets and Inlets.

       E.      ASHRAE 70 - Method of Testing for Rating the Air Flow Performance of Outlets
            and Inlets.

       F.     SMACNA - Low Pressure Duct Construction Standard.

1.04   QUALITY ASSURANCE

       A.     Test and rate performance of air outlets and inlets in accordance with ADC
              Equipment Test Code 1062 and ASHRAE 70.

       B.     Test and rate performance of louvers in accordance with AMCA 500.

1.05   REGULATORY REQUIREMENTS

       A.     Conform to ANSI/NFPA 90A.

1.07   SUBMITTALS

       A.     Submit product data under provisions of Section 23 00 00.UT.

       B.     Provide product data for items required for this project.

       C.     Submit schedule of outlets and inlets indicating type, size, location, application, and
              noise level.

       D.     Review requirements of outlets and inlets as to size, finish, and type of mounting
              prior to submitting product data and schedules of outlets and inlets.

       F.      Submit manufacturer's installation instructions under provisions of Section 23 00
            00.UT.

PART 2        PRODUCTS

2.01   AIR SUPPLIES AND RETURNS:

       A.     Grilles, registers and ceiling outlets shall be as scheduled on the Drawings and shall
              be provided with sponge rubber or soft felt gaskets. If a manufacturer other than the
              one scheduled is used, the sizes shown on the Drawings shall be checked for
              performance, noise level, face velocity, throw, pressure drop, etc., before the
              submittal is made. Selections shall meet the manufacturer's own published data for


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               the above performance criteria. The throw shall be such that the velocity at the end
               of the throw in the five foot occupancy zone will be not more than 50 FPM nor less
               than 25 FPM. Noise levels shall not exceed those published in the ASHRAE Guide
               for the type of space being served (NC level). Grilles, registers and ceiling outlets
               shall be Titus, or Metal*Aire.

       B.      Locations of outlets on Drawings are approximate and shall be coordinated with
               other trades to make symmetrical patterns and shall be governed by the established
               pattern of the lighting fixtures or architectural reflected ceiling plan. Where called
               for on the schedules, the grilles, registers and ceiling outlets shall be provided with
               deflecting devices and manual damper. These shall be the standard product of the
               manufacturer, subject to review by the Architect, and equal to brand scheduled.

       NOTE TO REVIEWER: The balance of Part 2 of this specification is the specification
            suggested by CSI. It is included to give guidance to improve this specification in
            the future. It is the feeling of the writer that this section of the specifications is in
            need of improvement, but with time constraints, improvement prior to this release
            was not possible.

2.02   ACCEPTABLE MANUFACTURERS - CEILING DIFFUSERS

   A. Titus.

   B. Krueger.

   C. Metal * Aire.

   D. [________________________________________.]

   E. [________________________________________.]

   F. Substitutions: Under provisions of Section [01 25 00.] [01 62 00.]

2.03   ROUND CEILING DIFFUSERS

       A.      Round, [adjustable pattern,] stamped or spun, multicore type diffuser to discharge
               air in 360 degree pattern, with sectorizing baffles where indicated; [Model [_____]
               manufactured by [______________.]]

       B.      Project diffuser collar [not more than one inch (25mm)] above ceiling face and
               connect to duct with duct ring. [In plaster ceilings, provide plaster ring and ceiling
               plaque.]

       C.      Fabricate of steel with baked enamel [off-white] [_____] finish.




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       D.      Provide [radial opposed blade] [butterfly] [combination splitter] damper and
               multi-louvered equalizing grid with damper adjustable from diffuser face.

2.04   RECTANGULAR CEILING DIFFUSERS

       A.      Rectangular, [adjustable pattern,] stamped, multicore type diffuser to discharge air
               in 360 degree pattern with sectorizing baffles where indicated; [Model [_____]
               manufactured by [_______________.]]

       B.      Provide [surface mount] [snap-in] [inverted T-bar] [spline] type frame. [In plaster
               ceilings, provide plaster frame and ceiling frame.]

       C.      Fabricate of steel with baked enamel [off-white] [_____] finish.

       D.      Provide [radial opposed blade] [butterfly] [combination splitter] damper and
               multi-louvered equalizing grid with damper adjustable from diffuser face.

2.05   PERFORATED FACE CEILING DIFFUSERS

       A.      Perforated face with fully adjustable pattern and removable face; [Model [_____]
               manufactured by [_______________.]]

       B.      Provide [surface mount] [snap-in] [inverted T-bar] [spline] type frame. [In plaster
               ceilings, provide plaster frame and ceiling frame.]

       C.      Fabricate of steel with steel or aluminum frame and baked enamel [off-white]
               [_____] finish.

       D.      Provide [radial opposed blade] [butterfly] [combination splitter] damper and
               multi-louvered equalizing grid with damper adjustable from diffuser face.

2.06   ACCEPTABLE MANUFACTURERS - MODIFIED LIGHT TROFFER DIFFUSERS

   A. Titus.

   B. Krueger.

   C. Metal * Aire.

   D. [________________________________________.]

   E. [________________________________________.]

   F. Substitutions: Under provisions of Section [01 25 00.] [01 62 00.]




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2.07   MODIFIED LIGHT TROFFER DIFFUSERS

       A.      [Single] [Double] plenum type constructed independent of light troffers with
            volume and pattern controllers, [4] [5] [6] inch ([100] [125] [150] mm) round or oval
            [top] [side] air inlet; [Model [_______________] manufactured by
            [_______________.]]

       B.      Match diffusers to light troffers and connect in airtight connection without tools.

       C.      Fabricate of galvanized steel with welded or soldered joints and finish matte black
               inside.

2.08   ACCEPTABLE MANUFACTURERS - CEILING REGISTERS/GRILLES

   A. Titus.

   B. Krueger.

   C. Metal * Aire.

   D. [________________________________________.]

   E. [________________________________________.]

   F. Substitutions: Under provisions of Section [01 25 00.] [01 62 00.]

2.09   CEILING SUPPLY REGISTERS/GRILLES

       A.      Streamlined and individually adjustable curved blades to discharge air along face of
               grille, [one-way] [two-way] deflection; [Model [_____] manufactured by
               [_______________.]]

       B.      Fabricate [1-1/4] [one] [_____] inch ([32] [25] [_____] mm) margin frame with
               [countersunk screw] [concealed] mounting and gasket.

       C.      Fabricate of aluminum extrusions with factory [clear lacquer] [prime coat] [_____]
               finish.

       D.      Provide integral, gang-operated opposed blade dampers with removable key
               operator, operable from face.


2.10   CEILING EXHAUST AND RETURN REGISTERS/GRILLES




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       A.   Streamlined blades, depth of which exceeds 3/4 inch (19 mm) spacing, with spring
            or other device to set blades, [vertical] [horizontal] face; [Model [_____]
            manufactured by [_______________.]

       B.   Fabricate [1-1/4] [one] [_____] inch ([32] [25] [_____] mm margin frame with
            [countersunk screw] [concealed] mounting.

       C.   Fabricate of steel with 20 gage (0.90 mm) minimum frames and 22 gage (0.80 mm)
            minimum blades, steel and aluminum with 20 gage (0.90 mm) minimum frame, or
            aluminum extrusions, with factory [baked enamel] [prime coated] [clear lacquer]
            [_____] finish.

       D.   Where not individually connected to exhaust fans, provide integral, gang-operated
            opposed blade dampers with removable key operator, operable from face.

       E.   In gymnasiums, blades shall be front pivoted, welded in place or securely fastened
            to be immobile.

2.11   CEILING GRID CORE EXHAUST AND RETURN REGISTERS/GRILLES

       A.   Fixed grilles of 1/2 x 1/2 x 1/2 inch (13 x 13 x 13 mm) louvers; [Model [_____]
            manufactured by [_______________.]]

       B.   Fabricate [1-1/4] [one] [_____] inch ([32] [25] [_____] mm) margin frame with
            [countersunk screw mounting.] [concealed mounting.] [lay-in frame for suspended
            grid ceilings.]

       C.   Fabricate of aluminum with factory [clear lacquer] [baked enamel] finish.

       D.   Where not individually connected to exhaust fans, provide integral, gang-operated
            opposed blade dampers with removable key operator, operable from face.

2.12   CEILING LINEAR EXHAUST AND RETURN GRILLES

       A.   Streamlined blades with 90 degree [one-way] [two-way] deflection, 1/8 x 3/4 inch
            (3.2 x 19 mm) on [1/4] [1/2] inch ([6] [13] mm) centers; [Model [_____]
            manufactured by [_______________.]]

       B.   Fabricate [1-1/4] [one] [_____] inch ([32] [25] [_____] mm) margin frame [extra
            heavy for floor mounting,] with [countersunk screw] [concealed] mounting.

       C.   Fabricate of steel with 20 gage (0.90 mm) minimum frames and 22 gage (0.80 mm)
            minimum blades, steel and aluminum with 20 gage (0.90 mm) minimum frame, or
            aluminum extrusions, with factory [baked enamel] [prime coated] [clear lacquer]
            [_______________] finish.


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       D.      Where not individually connected to exhaust fans, provide integral, gang-operated
               opposed blade dampers with removable key operator, operable from face.

2.13   ACCEPTABLE MANUFACTURERS - CEILING SLOT DIFFUSERS

   A. Titus.

   B. Krueger.

   C. Metal * Aire.

   D. [________________________________________.]

   E. [________________________________________.]

   F. Substitutions: Under provisions of Section [01 25 00.] [01 62 00.]

2.14   CEILING SLOT DIFFUSERS

       A.      Continuous [1/2] [3/4] [one] inch ([13] [19] [25] mm) wide slot, [one] [two] [three]
               [four] slots wide, with adjustable vanes for left, right, or vertical discharge.

       B.      Fabricate of aluminum extrusions with factory [clear lacquer] [baked enamel]
               [_____] finish.

       C.      Fabricate [1-1/4] [one] [_____] inch ([32] [25] [_____] mm) margin frame with
               [countersunk screw] [concealed] [support clips for suspension system] [support
               clips for T bar] mounting and gasket, [mitered end border.] [open end construction.]
               [end cap.]

2.15   ACCEPTABLE MANUFACTURERS - WALL REGISTERS/GRILLES

   A. Titus.

   B. Krueger.

   C. Metal * Aire.

   D. [________________________________________.]

   E. [________________________________________.]

   F. Substitutions: Under provisions of Section [01 25 00.] [01 62 00.]




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2.16   WALL SUPPLY REGISTERS/GRILLES

       A.   Streamlined and individually adjustable blades, depth of which exceeds 3/4 inch (19
            mm) maximum spacing with spring or other device to set blades, [vertical]
            [horizontal] face, [single] [double] deflection; Model [_____] manufactured by
            [_______________.]

       B.   Fabricate [1-1/4] [one] [_____] inch ([32] [25] [_____] mm) margin frame with
            [countersunk screw] [concealed] mounting and gasket.

       C.   Fabricate of steel with 20 gage (0.90 mm) minimum frames and 22 gage (0.80 mm)
            minimum blades, steel and aluminum with 20 gage (0.90 mm) minimum frame, or
            aluminum extrusions, with factory [baked enamel] [prime coat] [clear lacquer]
            [_____] finish.

       D.   Provide integral, gang-operated opposed blade dampers with removable key
            operator, operable from face.

       E.   In gymnasiums, blades shall be front pivoted, welded in place or securely fastened
            to be immobile.

2.17   WALL SUPPLY REGISTERS/GRILLES

       A.   Streamlined and individually adjustable curved blades to discharge air along face of
            grille, [one-way] [two-way] deflection; [Model [_____] manufactured by
            [_______________.]]

       B.   Fabricate [1-1/4] [one] [_____] inch ([32] [25] [_____] mm) margin frame with
            [countersunk screw] [concealed] mounting and gasket.

       C.   Fabricate of aluminum extrusions with factory [clear lacquer] [prime coat] [_____]
            finish.

       D.   Provide integral, gang-operated opposed blade dampers with removable key
            operator, operable from face.

2.18   WALL EXHAUST AND RETURN REGISTERS/GRILLES

       A.   Streamlined blades, depth of which exceeds 3/4 inch (19 mm) spacing, with spring
            or other device to set blades, [vertical] [horizontal] face; Model [_____]
            manufactured by [_______________.]

       B.   Fabricate [1-1/4] [one] [_____] inch ([32] [25] [_____] mm) margin frame with
            [countersunk screw] [concealed] mounting.




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       C.      Fabricate of steel with 20 gage (0.90 mm) minimum frames and 22 gage (0.80 mm)
               minimum blades, steel and aluminum with 20 gage (0.90 mm) minimum frame, or
               aluminum extrusions, with factory [baked enamel] [prime coated] [clear lacquer]
               [_____] finish.

       D.      Where not individually connected to exhaust fans, provide integral, gang-operated
               opposed blade dampers with removable key operator, operable from face.

       E.      In gymnasiums, blades shall be front pivoted, welded in place, or securely fastened
               to be immobile.

2.19   WALL GRID CORE EXHAUST AND RETURN REGISTERS/GRILLES

       A. Fixed grilles of 1/2 x 1/2 x 1/2 inch (13 x 13 x 13 mm) louvers; [Model [_____]
              manufactured by [___________.]]

       B.      Fabricate [1-1/4] [one] [_____] inch ([32] [25] [_____] mm) margin frame with
               [countersunk screw mounting.] [concealed mounting.] [lay-in frame for suspended
               grid ceilings.]

       C.      Fabricate of aluminum with factory [clear lacquer] [baked enamel] finish.

       D.      Where not individually connected to exhaust fans, provide integral, gang-operated
               opposed blade dampers with removable key operator, operable from face.

2.20   LINEAR WALL REGISTERS/GRILLES

       A.      Streamlined blades with [0] [15] degree deflection, 1/8 x 3/4 inch (3.2 x 19 mm) on
               [1/4] [1/2] inch ([6] [13] mm) centers; [Model [_____] manufactured by
               [_____________.]]

       B.      Fabricate of aluminum extrusions, with factory [clear lacquer] [prime coat] [_____]
               finish.

       C.      Fabricate [1-1/4] [one] [_____] inch ([32] [25] [_____] mm) margin frame with
               [countersunk screw] [concealed] mounting and gasket.

       D.      Provide integral [gang-operated opposed blade] [hinged single blade] damper with
               removable key operator, operable from face.

2.21   ACCEPTABLE MANUFACTURERS - FLOOR REGISTERS/GRILLES

   A. Titus.


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   B. Krueger.

   C. Metal * Aire.

   D. [________________________________________.]

   E. [________________________________________.]

   F. Substitutions: Under provisions of Section [01 25 00.] [01 62 00.]

2.22   LINEAR FLOOR SUPPLY REGISTERS/GRILLES

       A.      Streamlined blades with [0] [15] degree deflection, 1/8 x 3/4 inch (3 x 19 mm) on
               [1/4] [1/2] inch ([6] [13] mm) centers; [Model [_____] manufactured by
               [_______________.]]

       B.      Fabricate of aluminum extrusions with factory clear lacquer finish.

       C.      Fabricate [1-1/4] [one] [_____] inch ([32] [25] [_____] mm) margin heavy] margin
               frame with [countersunk screw mounting] [concealed mounting and gasket] [, and
               mounting frame.]

       D.      Provide integral [gang-operated opposed blade] [hinged single blade] damper with
               removable key operator, operable from face.

2.23   FLOOR SUPPLY REGISTERS/GRILLES

       A.      Individually adjustable blades, wide stamped border, singled or double blade
               damper with set screw adjustment; [Model [_____] manufactured by
               [_______________.]]

       B.      Fabricate of steel, welded construction, with factory baked enamel finish.

2.24   ACCEPTABLE MANUFACTURERS - DOOR GRILLES

   A. Titus.

   B. Krueger.

   C. Metal * Aire.

   D. [________________________________________.]

   E. [________________________________________.]


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   F. Substitutions: Under provisions of Section [01 25 00.] [01 62 00.]

2.25   DOOR GRILLES

       A.      V-shaped louvers of 20 gage (0.90 mm) steel, one inch (25 mm) deep on 1/2 inch
               (13 mm) centers; [Model [_____] manufactured by [_______________.]]

       B.      Provide 20 gage (0.90 mm) steel frame with auxiliary frame to give finished
               appearance on both sides of door, with factory prime coat finish.

2.26   ACCEPTABLE MANUFACTURERS - LOUVERS

   A. Titus.

   B. Krueger.

   C. Metal * Aire.

   D. [________________________________________.]

   E. [________________________________________.]

   F. Substitutions: Under provisions of Section [01 25 00.] [01 62 00.]

2.27   LOUVERS

       A.      Provide [4] [6] inch ([100] [150] mm) deep louvers with blades on 45 degree slope
               [with center baffle and return bend], heavy channel frame, bird screen with 1/2 inch
               (13 mm) square mesh for exhaust and 3/4 inch (19 mm) for intake; [Model [_____]
               manufactured by [_______________.]]

       B.      Fabricate of [16 gage (1.50 mm) galvanized steel] [or] [12 gage (2.50 mm) extruded
               aluminum], welded assembly, with factory [prime coat] [baked enamel] [color
               anodized] finish.

       C.      Furnish with [interior] [exterior] [flat flange] [angle flange] [screw holes in jambs]
               [masonry strap anchors] for installation.

       D.      Fabricate louver penthouses with mitered corners and reinforce with structural
               angles.

2.28   ACCEPTABLE MANUFACTURERS - ROOF HOODS

       A.      [________________________________________.]


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       B.   [________________________________________.]

       C.   [________________________________________.]

       D.   Substitutions: Under provisions of Section [01 25 00.] [01 62 00.]

2.29   ROOF HOODS

       A.   Fabricate air inlet or exhaust hoods in accordance with SMACNA Low Pressure
            Duct     Construction     Standards;    [Model    [_____]  manufactured  by
            [_______________.]]

       B.   Fabricate of galvanized steel, minimum 16 gage (1.50 mm) base and 20 gage (0.90
            mm) hood, or aluminum, minimum 16 gage (1.50 mm) base and 18 gage (1.20 mm)
            hood; suitably reinforced; with removable hood; bird screen with 1/2 inch (13 mm)
            square mesh for exhaust and 3/4 inch (19 mm) for intake, and factory [prime coat]
            [baked enamel] finish.

       C.   Mount unit on minimum 12 inch (300 mm) high curb base with insulation between
            duct and curb.

       D.   Make hood outlet area minimum of twice throat area.

2.30   GOOSENECKS

       A.   Fabricate in accordance with SMACNA Low Pressure Duct Construction Standards
            of minimum 18 gauges (1.20 mm) galvanized steel.

       B.   Mount on minimum 12 inch (300 mm) high curb base where size exceeds [9 x 9
            inch (230 x 230 mm).] [_____.]

PART 3      EXECUTION

3.01   INSTALLATION

       A.   Install items in accordance with manufacturers' instructions.

       B.   Check location of outlets and inlets and make necessary adjustments in position to
            conform with architectural features, symmetry, and lighting arrangement. Refer to
            Section 09 91 00.

       C.   Install diffusers to ductwork with air tight connection.




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D.   Provide balancing dampers on duct take-off to diffusers, and grilles and registers,
     regardless of whether dampers are specified as part of the diffuser, or grille and
     register assembly. Where take-off dampers are accessible, dampers at the air device
     should be omitted.

E.   Paint ductwork visible behind air outlets and inlets matte black. Refer to Section 09
     91 00.



                             END OF SECTION

                                   -o0o-




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