Enter your postcode to look up your EPC, then get an instant heat loss estimate — no email required.
This tool gives a simplified heat loss estimate using CIBSE regional design temperatures and your EPC data. It is not a substitute for a full BS EN 12831 survey, which an MCS-certified installer must carry out before installation. Cost figures use Ofgem Q1 2025 unit rates and 2025 installation market data. Privacy policy · Affiliate disclosure