Heat Pump Sizing for 180 m² (1,938 sq ft) — UK & Temperate Maritime (-5°C Design, UK/IE/NZ)
Thermal heat loss calculation, recommended heat pump capacity (kW, BTU/h & HVAC Tons), SCOP efficiency, and annual electricity consumption.
Recommended Heat Pump10.0 kW34,121 BTU/h (2.84 Tons)
Annual Electricity Usage4,127 kWh/yrDelivers 16,920 kWh Heat (SCOP 4.1)
Savings vs Direct Electric12,793 kWh/yrSpecific Load: 52.2 W/m²
Electrical Circuit (230V)20 A BreakerPeak Compressor Input: 3.03 kW
Thermal & Electrical Specification Table (180 m² / 1,938 sq ft)
| Heated Floor Area | 180 m² (1,938 sq ft) |
| Climate Zone & Design Outdoor Temp | UK & Temperate Maritime (-5°C Design, UK/IE/NZ) |
| Building Insulation Envelope | Standard Double-Glazed Insulation (55 W/m² Base) (52.2 W/m² Peak) |
| Peak Space Heating Load | 9.4 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 10.0 kW (34,121 BTU/h · 2.84 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 4.1 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 16,920 kWh Heat → 4,127 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 180 m² (1938 sq ft) house?
For a 180 m² (1938 sq ft) building with Standard Double-Glazed Insulation (55 W/m² Base) in UK & Temperate Maritime (-5°C Design, UK/IE/NZ), the peak space heating load is 9.4 kW (52.2 W/m²). Including domestic hot water allowance, a 10.0 kW (34,121 BTU/h / 2.84 Ton) heat pump is recommended.
How many kWh of electricity does a 10.0 kW heat pump use per year?
With a Seasonal Coefficient of Performance (SCOP) of 4.1 over 1800 full-load equivalent heating hours, the heat pump consumes approximately 4,127 kWh of electricity per year to deliver 16,920 kWh of heat — saving 12,793 kWh/year compared to direct electric radiators.
Compare Other Home Sizes & Climate Zones
60 m² (646 ft²) Heat Pump80 m² (861 ft²) Heat Pump100 m² (1076 ft²) Heat Pump120 m² (1292 ft²) Heat Pump140 m² (1507 ft²) Heat Pump160 m² (1722 ft²) Heat Pump200 m² (2153 ft²) Heat Pump250 m² (2691 ft²) Heat Pump300 m² (3229 ft²) Heat Pump180 m² in Nordic / Scandinavia180 m² in Central Europe / DACH180 m² in US North & Canada Cold180 m² in US Sunbelt & Mediterranean180 m² in Australia & Mild APAC