Free heat pump calculator

Free heat pump calculator

Enter your postcode to look up your EPC, then get an instant heat loss estimate — no email required.

🔒 No personal data stored 📋 Uses your EPC data 🌡 CIBSE regional temperatures ✓ MCS-certified installers only
STEP 1 OF 4 — LOCATION Find your property

Where is the property?

Enter your postcode and we'll look up your EPC certificate to pre-fill your property details automatically.

About your home

Check these details match your home. We've pre-filled what we can from your EPC.

Total heated floor area

Used for regional design temperature

Bedrooms & bathrooms

Not held on your EPC — please confirm these manually.

Determines hot water cylinder size

Current heating

e.g. underfloor downstairs, radiators upstairs

Construction & insulation

Build era is the strongest proxy for wall insulation quality.

💡 Not sure? Check your EPC at find-energy-certificate.service.gov.uk ↗

UK Government Boiler Upgrade Scheme

Most homes replacing fossil fuel or electric heating are eligible for a government grant.

🏛
GOV.UK
BOILER
UPGRADE

Boiler Upgrade Scheme (BUS)

A government grant to help cover the cost of installing a heat pump. Runs until 2028.

£7,500
Standard grant · England & Wales
Air source heat pumps
England, Scotland & Wales

Your eligibility

✅
Eligible — replacing gas heating
Based on the fuel type you selected in Step 2. Your installer applies for the grant on your behalf.

What is your relationship to the property?

Available to owner-occupiers and private landlords. Tenants should speak to their landlord.

📋 Learn more: Ofgem ↗ · Energy Saving Trust ↗ · MCS Certified ↗

What's included in your installation

  • ✓
    MCS certified installation by a qualified, accredited installer
  • ✓
    Full heat loss survey to correctly size your system
  • ✓
    DNO application — grid connection paperwork handled for you
  • ✓
    BUS grant application handled by your installer
  • ✓
    Energy Performance Certificate (EPC) check and update if needed
  • ✓
    Commissioning & handover — system set up and explained
  • ✓
    Manufacturer's warranty — typically 2–7 years depending on installer

Simplified estimate using CIBSE design temperatures and EPC data. Not a substitute for a full BS EN 12831 survey. Cost figures use Ofgem Q2 2026 rates.
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