About this calculator

Payback = (install cost − grant) ÷ annual savings. Annual heat demand (kWh) ÷ SCOP = electricity kWh. Compare against boiler kWh × fuel price ÷ boiler efficiency. Typical EU SCOP 3.2–4.2; UK BUS grant £7,500; DE BEG up to 70 %.

Frequently asked questions

What does the Heat Pump ROI & Payback (EU) do?

Annual savings and payback period for an air-source heat pump vs your existing gas/oil boiler at local electricity and fuel tariffs. Payback = (install cost − grant) ÷ annual savings. Annual heat demand (kWh) ÷ SCOP = electricity kWh. Compare against boiler kWh × fuel price ÷ boiler efficiency. Typical EU SCOP 3.2–4.2; UK BUS grant £7,500; DE BEG up to 70 %.

Is the Heat Pump ROI & Payback (EU) free to use?

Yes. Every calculator on Calcurly.com is free, works in your browser without sign-up, and can be embedded on your own website.

How accurate is the Heat Pump ROI & Payback (EU)?

Results are calculated in real time using industry-standard formulas. Treat the output as a well-informed estimate — always cross-check with local regulations, product datasheets, or a qualified hvac & climate professional before committing to a purchase or a job.

What inputs does the Heat Pump ROI & Payback (EU) need?

Enter values for: Annual heat demand (kWh), Heat pump SCOP, Electricity price (€/kWh), Current fuel price (€/kWh), Old boiler efficiency, Install cost (€). Sensible defaults are pre-filled where possible so you can start with a single change.

Can I embed the Heat Pump ROI & Payback (EU) on my own website?

Yes — copy the iframe snippet at the bottom of this page, or use the Embed Generator to customise the size. The embedded version stays in sync with the live calculator on Calcurly.com.