Heat Pump Size Calculator
Calculate the perfect capacity for your home
Calculate ideal heat pump size: Enter your property details to get capacity (kW), annual costs, and system recommendations.
Size Calculator
Results
System Recommendations
FAQs
Depends on property size, insulation, climate. Most need 5-15 kW. Use this calculator for accurate sizing.
Typically £500-£2,500/year in UK. Modern systems (COP 4.0+) cheaper than gas boilers.
ASHP: £8-15k, easy. GSHP: £15-30k, more efficient. GSHP needs 10-15% less capacity.
Yes, but may need +5-15% larger size. Heat pumps prefer lower temps (35-45°C).
Most ASHP are permitted in UK. Check with local council. Building regs always needed.
Boiler Upgrade Scheme: £5,000 ASHP, £6,000 GSHP. Check gov.uk for details.
15-25 years with maintenance. Annual checks £150-300. 10-year warranties typical.
±10-15% for homes. Results are recommendations. Consult engineer for final sizing.