CFM & Airflow Calculator

Find the airflow a room needs from its volume and a target air-change rate. Pick a space type for a typical ACH or enter your own.

Room

Ventilation Method

Length (ft)

Width (ft)

Height (ft)

Space Type

Air Changes/Hr

Required Airflow

Required CFM180 CFM

Room Volume2,700 ft³

CFM = (volume × ACH) ÷ 60.

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