Heat Pump Sizing for 130 m² (1,399 sq ft) — Nordic / Scandinavia (-20°C Design, SE/NO/FI/DK)
Thermal heat loss calculation, recommended heat pump capacity (kW, BTU/h & HVAC Tons), SCOP efficiency, and annual electricity consumption.
Recommended Heat Pump10.2 kW34,804 BTU/h (2.9 Tons)
Annual Electricity Usage7,379 kWh/yrDelivers 25,090 kWh Heat (SCOP 3.4)
Savings vs Direct Electric17,711 kWh/yrSpecific Load: 74.2 W/m²
Electrical Circuit (230V)25 A BreakerPeak Compressor Input: 3.92 kW
Thermal & Electrical Specification Table (130 m² / 1,399 sq ft)
| Heated Floor Area | 130 m² (1,399 sq ft) |
| Climate Zone & Design Outdoor Temp | Nordic / Scandinavia (-20°C Design, SE/NO/FI/DK) |
| Building Insulation Envelope | Standard Double-Glazed Insulation (55 W/m² Base) (74.2 W/m² Peak) |
| Peak Space Heating Load | 9.65 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 10.2 kW (34,804 BTU/h · 2.9 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 3.4 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 25,090 kWh Heat → 7,379 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 130 m² (1399 sq ft) house?
For a 130 m² (1399 sq ft) building with Standard Double-Glazed Insulation (55 W/m² Base) in Nordic / Scandinavia (-20°C Design, SE/NO/FI/DK), the peak space heating load is 9.65 kW (74.2 W/m²). Including domestic hot water allowance, a 10.2 kW (34,804 BTU/h / 2.9 Ton) heat pump is recommended.
How many kWh of electricity does a 10.2 kW heat pump use per year?
With a Seasonal Coefficient of Performance (SCOP) of 3.4 over 2600 full-load equivalent heating hours, the heat pump consumes approximately 7,379 kWh of electricity per year to deliver 25,090 kWh of heat — saving 17,711 kWh/year compared to direct electric radiators.
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