Heat Pump Sizing Calculator Calculate your estimated peak heat loss to properly size an Air Source Heat Pump (ASHP). Floor Area (m²) ? Storeys 1 Storey (Bungalow)2 Storeys (Standard)3+ Storeys Property Type Mid-Terrace / FlatSemi-Detached / End-TerraceDetached Age & Insulation Post-2010 (Modern regs)1990 – 2010 (Cavity wall)Pre-1990 (Basic insulation)Pre-1920 (Solid wall) Ceiling Height Standard (2.4m)High … Continue reading Heat Pump Size Calculator