ROI Calculator

Estimate your fan-energy savings

Enter a unit's airflow and pressure drop to estimate the project cost and the fan energy saved by bringing coil delta P back toward design.

Airflow (CFM)

Current coil delta P (in. w.c.)

Design coil delta P (in. w.c.)

Operating hours / yr

Electricity cost ($/kWh)

Fan + motor + drive efficiency (%)

Estimated annual fan-energy savings$0

Manual Project cost (est., plus shipping)
Fan power saved
Energy saved per year
Simple payback on project
Bio-Automation cost (est., one air handler, plus shipping)

Estimates only. Formula: fan power (kW) = CFM × delta P (in. w.c.) ÷ 6356 × 0.746 ÷ efficiency. Savings = (kW at current delta P − kW at design delta P) × hours × $/kWh. Fan energy only; excludes cooling/heating and other effects. Actual results vary by building. Example: a 25,000 CFM unit going from 1.0" to 0.5" at 45% efficiency, 8,760 hrs and $0.20/kWh saves about $5,700/yr.