Heat Recovery — ROI / Payback Report

Template · fill in the values from your on-site calculator result
___ kW
Heat recovered (avg)
___ kWh/yr
Annual energy saved
$ ___
Annual cost saving
___ yr
Simple payback

1. Input Assumptions

InputValue
Exhaust airflow_________ m³/h
Supply / exhaust temperature difference_________ K
Operating hours per year_________ h
Energy price$ _________ /kWh
Recovery efficiency_________ %
Equipment cost (capex)$ _________

2. Methodology

  1. Mass flow: ṁ = Volume × ρ(1.2 kg/m³) ÷ 3600 (kg/s).
  2. Recovered power: P = ṁ × cp(1.006 kJ/kg·K) × ΔT × η.
  3. Annual energy: E = P × operating hours.
  4. Annual saving: S = E × energy price.
  5. Simple payback: PB = Capex ÷ S.
  6. 10-yr net benefit: 10×S − Capex (excludes O&M, ~1–3 %/yr).

3. What Drives Payback

LeverEffect on payback
Higher operating hoursShortens payback linearly
Higher energy priceShortens payback (1.5× at $0.20 vs $0.10)
Higher recovery efficiencyMore savings, but higher capex — optimise, don't maximise
Cold-climate frost controlAdds preheat load — size carefully
Demand-side heat reuseBoosts effective value vs. dumped heat
This template is a screening tool. A formal proposal from 26YC includes site-specific duty points, fan-power penalty, control strategy, and a guaranteed effectiveness range. Use the contact form on the calculator page to request a written analysis.
© 26YC — Air-to-Air Heat Recovery & Heat Exchanger Solutions · www.26yc.com
Generated from the Heat Recovery ROI Calculator. Preliminary estimate — not a quotation.