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14 Cards in this Set
- Front
- Back
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Total pressure |
Static pressure + velocity pressure |
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Velocity pressure |
The force at which the air is moving |
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Static pressure |
The force of air pushing out in all directions of the duct system. |
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TESP |
Total External Static Pressure |
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MERV |
Minimum efficiency reporting value |
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CFM |
Cubic Feet per minute |
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Airflow is measured in |
CFM |
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CFM heat pump temperature rise method formula |
(Volts×Amps×3.413)/ 🔼T × 1.08 |
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CFM Temperature Rise Method for a Gas furnace |
BTU/ (🔼 × 1.08) |
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What is the name of insulation inside metal duct work? |
Inner liner |
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All duct work needs to be insulated |
in a non-conditioned space |
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How do you know if a gas furnace had good airflow? |
When temperature rise is within range given on nameplate |
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Symptoms of bad airflow |
Loud return Dirty blower wheel Dirty evap coil Frozen evap coil Low SH Overworked blower motor Turbulant air back into drain line |
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Lower velocity |
Higher delta T |
