Heat Pump Sizing for 412 m² (4,435 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 Pump26.6 kW90,763 BTU/h (7.56 Tons)
Annual Electricity Usage14,391 kWh/yrDelivers 54,684 kWh Heat (SCOP 3.8)
Savings vs Direct Electric40,293 kWh/yrSpecific Load: 63.2 W/m²
Electrical Circuit (230V)50 A BreakerPeak Compressor Input: 8.87 kW
Thermal & Electrical Specification Table (412 m² / 4,435 sq ft)
| Heated Floor Area | 412 m² (4,435 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 | 26.04 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 26.6 kW (90,763 BTU/h · 7.56 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 3.8 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 54,684 kWh Heat → 14,391 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 412 m² (4435 sq ft) house?
For a 412 m² (4435 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 26.04 kW (63.2 W/m²). Including domestic hot water allowance, a 26.6 kW (90,763 BTU/h / 7.56 Ton) heat pump is recommended.
How many kWh of electricity does a 26.6 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 14,391 kWh of electricity per year to deliver 54,684 kWh of heat — saving 40,293 kWh/year compared to direct electric radiators.
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