Heat load (kW) and return–supply ΔT → approximate CFM.
Last Updated: 12 Mar 2026
Sensible airflow estimate: Q (BTU/h) ≈ 1.08 × CFM × ΔT (°F). Heat load is converted from kW using 3412 BTU/h per kW.
Required airflow ≈ 3949 CFM
Using Q = 85304 BTU/h at ΔT = 20.00°F
Airflow (CFM) Calculator helps you heat load (kw) and return–supply δt → approximate cfm. It is commonly used by network admins, IT support teams, ops engineers for cfm calculator, data center airflow, sensible heat cfm.
Sensible airflow
Uses the standard approximation for dry air at about sea level:
Q (BTU/h) ≈ 1.08 × CFM × ΔT (°F)
Heat load in kW is converted to BTU/h using 3412 BTU/h per kW. ΔT can be entered in °F or °C (converted internally).
Limits
- Assumes **sensible** heat dominance; latent loads change required airflow.
- Altitude and humidity affect density; 1.08 is a common design shortcut, not a substitute for detailed CFD or manufacturer curves.