Heat Pump Sizing for 156 m² (1,679 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 Pump15.8 kW53,912 BTU/h (4.49 Tons)
Annual Electricity Usage8,422 kWh/yrDelivers 32,004 kWh Heat (SCOP 3.8)
Savings vs Direct Electric23,582 kWh/yrSpecific Load: 97.7 W/m²
Electrical Circuit (230V)30 A BreakerPeak Compressor Input: 5.27 kW
Thermal & Electrical Specification Table (156 m² / 1,679 sq ft)
| Heated Floor Area | 156 m² (1,679 sq ft) |
| Climate Zone & Design Outdoor Temp | Central Europe / DACH (-12°C Design, DE/CH/AT/NL) |
| Building Insulation Envelope | Older Uninsulated Building (85 W/m² Base) (97.7 W/m² Peak) |
| Peak Space Heating Load | 15.24 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 15.8 kW (53,912 BTU/h · 4.49 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 3.8 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 32,004 kWh Heat → 8,422 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 156 m² (1679 sq ft) house?
For a 156 m² (1679 sq ft) building with Older Uninsulated Building (85 W/m² Base) in Central Europe / DACH (-12°C Design, DE/CH/AT/NL), the peak space heating load is 15.24 kW (97.7 W/m²). Including domestic hot water allowance, a 15.8 kW (53,912 BTU/h / 4.49 Ton) heat pump is recommended.
How many kWh of electricity does a 15.8 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 8,422 kWh of electricity per year to deliver 32,004 kWh of heat — saving 23,582 kWh/year compared to direct electric radiators.
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