Given the following readings from an electric furnace, use the formula to calculate airflow

CFM =

What is the airflow in CFM and does this furnace have the recommended air flow?

Voltage at strips 240 V
Amp draw of strips 22.6 A
Return-air temperature 65 °F
Supply-air temperature 120 °F

A) The air flow is 312 CFM; No, the air flow is too low.
B) The airflow is 336 CFM; No, the air flow is too low.
C) The air flow is 312 CFM; Yes, the air flow is at the recommended level.
D) The airflow is 336 CFM; Yes, the air flow is at the recommended level.


C

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