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Home / Calculators / CFM Airflow Volume Sizer
Airflow & Psychrometrics โœ“ ISO/ASHRAE Thermodynamic Math โ€ข Calibrated for 42ยฐC Tropical Ambient

CFM Airflow Volume Sizer

Calculate required air delivery in Cubic Feet per Minute (CFM) across cooling coils for split, cassette, and central AHU systems.

โšก Live Interactive Computation Engine โœ“ Real-Time Field Calibrated
Required Air Delivery
800 CFM
400 CFM / Ton Industry Standard
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Governing Formula:
CFM = Sensible Heat (BTU/hr) / (1.08 ร— Delta T); Standard rule of thumb: 400 CFM per Ton of Refrigeration
Pune Field Notes & Environmental Standards:

Sensible heat constant 1.08 = Specific heat of air (0.24) ร— Density (0.075) ร— 60 mins/hr.

Technical Engineering Guide & Field Diagnostic Practices

Airflow is the lifeblood of heat exchange. Insufficient CFM causes coil freezing, low evaporating temperatures, and compressor liquid floodback. Excessive CFM prevents adequate dehumidification and creates unpleasant drafts and noise.

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