Burner Combustion Air Fan Power Calculator
Reviewed by Hamza Gujjar, Algorithm Architect & Software Developer
Last updated: July 26, 2026Burner Combustion Air Fan Power Calculator
Selecting a combustion air fan means matching motor power to the actual work the fan has to do - moving a given air flow against the system's total resistance, at that fan's own efficiency.
The Formula
P = (Q × ΔP) / efficiency
Worked Example
0.5 m³/s of air flow against 1,500 Pa of system pressure at 65% fan efficiency:
P = (0.5 × 1,500) / 0.65 = 1,153.8 W ≈ 1.15 kW
How to Use This Calculator
- Enter the required air flow rate.
- Enter total system pressure rise (see the Burner Fan Total Static Pressure Calculator).
- Enter fan efficiency as a decimal fraction (e.g. 0.65 for 65%).
Add a service factor margin above this figure when selecting an actual motor.