# Commercial Load Calculation Form - DOC by epa20951

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COURSE OUTLINE FORM

COURSE TITLE:                       ADVANCED COMMERCIAL AIR CONDITIONING

COURSE PREFIX AND NO. HVAC 2421                         LEC     2     LAB   3      CREDIT HOURS            3

COURSE DESCRIPTION:

Calculations on heat loss and gain are calculated for small commercial buildings. Duct layout is covered with
special emphasis on equipment selection and registers and grilles.

COURSE PREREQUISITE (S):

HVAC 2400

RATIONALE:

The purpose of this class is to give the student the ability to calculate a load for small commercial buildings, and
select the equipment and accessories, size and design the ductwork.

REQUIRED TEXTBOOK (S) and/or MATERIALS:

Title:        Air Duct Calculator
Edition:      Current
Publisher: Air Conditioning Contractors of America
Materials: Calculator, Manual N Forms, Air Duct Calculator, and Architect Ruler

Attached course outline written by:                        James Revoy             Date:   October 1999
Reviewed/Revised by:                                       James Revoy             Date:   October 2009
Effective quarter of course outline:                          10/FA                Date:

Course Objectives, Topical Unit Outlines, and Unit Objectives must be attached to this form.

Please check Public Folders/Ed Services/Forms                                                    ESO Revised 11-13-01
For the MOST CURRENT VERSION of this form                                                               (Page 1 of 4)
Metropolitan Community College
COURSE OUTLINE FORM

TITLE:          Advanced Commercial Air Conditioning Systems                  PREFIX/NO:       HVAC 2421

COURSE OBJECTIVES:

Upon completion of this course, the student will be able to:

1.    Calculate the heat loss and gain for a small commercial building.
2.    Demonstrate the use of an air-duct calculator.
3.    Select appliances for a building.
4.    Design a duct system and select registers and grilles.

TOPICAL UNIT OUTLINE/UNIT OBJECTIVES:

UNIT I. HEAT LOSS/HEAT GAIN
A.    Review a drawing and read construction specifications for a commercial building.
B.    Identify the tables in the Manual N used for heating and cooling.
C.    Compare the construction specifications of the building to the tables in Manual N to find the “U” valve for
different construction materials of the building.
D.    Calculate the design conditions for heating and cooling.
E.    Measure the area of the different materials of the building and calculate the transmission losses to find the
BTUH for heating and cooling.
F.    Calculate solar radiation through glass, internal heat gain and lights for cooling.
G.    Calculate infiltration and/or ventilation for heating and cooling.
H.    Calculate the total BTUH load for heating and cooling on the N-1 Form.

UNIT II. AIR-DUCT CALCULATOR
A.    Name the three variables that are used in sizing ducts.
B.    Define cfm, fpm, and friction loss.
C.    Explain what is meant by sizing ducts by the equal friction method.
D.    Identify and read the cfm, fpm, friction-loss and round and rectangular duct scales on the air-duct
calculator.
E.    Practice sizing ducts by using the air-duct calculator and the fpm chart.

UNIT III. APPLIANCES (SELECTION)
A.    Review the drawing to determine where the unit is to be installed.
B.    Apply the total heating (BTUH) load from the N-1 Form to size for a gas or electric furnace.
C.    Use equations to calculate from the total sensible and latest load on the N-1 Form to size for an air
conditioner.
D.    Compare the cfm of the gas or electric furnace to the air-flow of the air conditioner.
E.    Examine various brochures for the application.
F.    Select a heating and cooling unit within the limits of the calculated total BTUH load from the Form N-1.
Please check Public Folders/Ed Services/Forms                                                   ESO Revised 11-13-01
For the MOST CURRENT VERSION of this form                                                              (Page 2 of 4)
Metropolitan Community College
COURSE OUTLINE FORM

UNIT IV.          DUCT DESIGN AND ACCESSORIES

A.    Analyze the drawing, and position the unit.
B.    Sketch a one-line duct layout of the trunks and branches.
C.    Select the largest cfm from the furnace or air conditioner to size the duct system.
D.    Design a duct system within the limits of the fpm chart.
E.    Inspect duct layout to determine placement of registers and grilles.
F.    Examine various brochures and select registers and grilles within their cfm requirements.

Please check Public Folders/Ed Services/Forms                                                    ESO Revised 11-13-01
For the MOST CURRENT VERSION of this form                                                               (Page 3 of 4)
Metropolitan Community College
COURSE OUTLINE FORM

COURSE REQUIREMENTS/EVALUATION:

Upon completion of the objectives for this course, the student will have moved from basic cognitive practice
levels, through the level of evaluation in relation to load calculation, duct design, and equipment selection. In
addition, the student will have demonstrated the psychomotor ability to analyze in the cited areas.

COURSE OBJECTIVES/ASSESSMENT MEASURES

COURSE OBJECTIVES                                          ASSESSMENT MEASURES
1.   Calculate the heat loss and gain of a small                1.   Tests and lab work consist of heat loss and gain
commercial building.                                            on light commercial buildings.

2.   Demonstrate the use of an air-duct calculator.             2.   Lab work and test on the air-duct calculator.

3.   Select appliance for a building.                           3.   Various brochures are reviewed.

4.   Design a duct system and select registers and              4.   Lab work consists of a total layout of a duct
grilles.                                                        system with registers and grilles.

Please check Public Folders/Ed Services/Forms                                                         ESO Revised 11-13-01
For the MOST CURRENT VERSION of this form                                                                    (Page 4 of 4)

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