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To calculate the System Pressure Drop to be looked up on the following fan curves, which are drawn at standard conditions, enter the information required in the boxes below. Use US Standard units.

Operational Conditions (US Standard Units)

* indicates a required field

Temperature of air at the fan inlet: * °F

System pressure drop before the fan inlet:* in.wg.

System pressure drop after the fan:* in.wg.

Elevation above sea level at which the fan
must achieve the above conditions:*feet

 

System pressure drop on attached curves: in.wg.

Air density at the operational condition: lb/ft^3

To determine the power required by the fan at the operational conditions, multiply the power shown on the fan curves by:

Click here to see US Standard units performance curves.

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