CFM Calculator — Free Online Tool
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CFM Calculator

Calculate required airflow in Cubic Feet per Minute (CFM)

Formula: Airflow (CFM) = [ Room Volume (cu ft) × Air Changes per Hour (ACH) ] / 60
Ventilation Parameters

Calculation Results

⚠️ Airflow requirements vary based on occupancy levels, duct friction losses, and local building codes (ASHRAE). Always verify fan ratings and static pressure before installation.

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