Maricopa Community Colleges  HVA233   19986-19992 
Official Course Description:   MCCCD Approval:  03/24/98  
HVA233      19986-19992 LEC 3 Credit(s) 3 Period(s)
Duct Design and Air Balance
Design residential and light commercial ducting systems. Calculation of duct size for constant and variable air flow. System operating characteristics and air measuring devices. Test, adjust and balance an air distribution system according to design specifications. Prerequisites: HVA133 or permission of instructor.
 
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MCCCD Official Course Competencies:
 
HVA233   19986-19992 Duct Design and Air Balance
1. Describe the specific types of duct distribution systems. (I)
2. Describe specific air side devices and equipment. (II)
3. Calculate duct sizing for constant and variable flow. (III)
4. Explain specific system operating characteristics. (IV)
5. Explain the function of specific air measuring devices. (V)
6. Measure air flow to design specifications. (VI)
7. Adjust air flow to design specifications. (VII)
8. Identify operational problems and describe the appropriate correction. (VIII)
9. Calculate specific duct system efficiencies. (IX)
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MCCCD Official Course Outline:
 
HVA233   19986-19992 Duct Design and Air Balance
    I. Distribution Systems
        A. Trunk and branch
        B. Radial
        C. Perimeter loop
      II. Air Side Devices and Equipment
          A. Devices
            1. supply outlets
            2. grills
            3. dampers
            4. junction boxes
          B. Equipment
            1. heating
            2. cooling
            3. air moving
            4. air cleaning
            5. humidifier
        III. Calculate Ducting
            A. Constant volume rigid duct
            B. Flexible duct
            C. Variable volume
          IV. Operating Characteristics
              A. System operating points
              B. Blowers
            V. Air Measuring Devices
                A. Incline mamometer
                B. Velometer
                C. Flow hood
                D. Other
              VI. Measuring Air Flow
                  A. Incline mamometer
                  B. Velometer
                  C. Flow hood D Other
                VII. Testing, Adjusting and Balancing
                    A. Blower door
                    B. Pressure measurement
                    C. Air-side balancing
                  VIII. Operational Problems
                      A. Noise
                      B. System add-on
                      C. Too much air
                      D. Too little air
                    IX. System Efficiencies
                        A. Aerodynamic
                        B. Conduction loses
                        C. Leakage loses
                        D. Leakage loads
                        E. Operating cost
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