Heat Pump Sizing for 140 m² (1,507 sq ft) — Central Europe / DACH (-12°C Design, DE/CH/AT/NL)
Thermal heat loss calculation, recommended heat pump capacity (kW, BTU/h & HVAC Tons), SCOP efficiency, and annual electricity consumption.
Recommended Heat Pump9.4 kW32,074 BTU/h (2.67 Tons)
Annual Electricity Usage4,891 kWh/yrDelivers 18,585 kWh Heat (SCOP 3.8)
Savings vs Direct Electric13,694 kWh/yrSpecific Load: 63.2 W/m²
Electrical Circuit (230V)20 A BreakerPeak Compressor Input: 3.13 kW
Thermal & Electrical Specification Table (140 m² / 1,507 sq ft)
| Heated Floor Area | 140 m² (1,507 sq ft) |
| Climate Zone & Design Outdoor Temp | Central Europe / DACH (-12°C Design, DE/CH/AT/NL) |
| Building Insulation Envelope | Standard Double-Glazed Insulation (55 W/m² Base) (63.2 W/m² Peak) |
| Peak Space Heating Load | 8.85 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 9.4 kW (32,074 BTU/h · 2.67 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 3.8 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 18,585 kWh Heat → 4,891 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 140 m² (1507 sq ft) house?
For a 140 m² (1507 sq ft) building with Standard Double-Glazed Insulation (55 W/m² Base) in Central Europe / DACH (-12°C Design, DE/CH/AT/NL), the peak space heating load is 8.85 kW (63.2 W/m²). Including domestic hot water allowance, a 9.4 kW (32,074 BTU/h / 2.67 Ton) heat pump is recommended.
How many kWh of electricity does a 9.4 kW heat pump use per year?
With a Seasonal Coefficient of Performance (SCOP) of 3.8 over 2100 full-load equivalent heating hours, the heat pump consumes approximately 4,891 kWh of electricity per year to deliver 18,585 kWh of heat — saving 13,694 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 Pump160 m² (1722 ft²) Heat Pump180 m² (1938 ft²) Heat Pump200 m² (2153 ft²) Heat Pump250 m² (2691 ft²) Heat Pump300 m² (3229 ft²) Heat Pump140 m² in Nordic / Scandinavia140 m² in UK & Temperate Maritime140 m² in US North & Canada Cold140 m² in US Sunbelt & Mediterranean140 m² in Australia & Mild APAC