Heat Pump Sizing for 284 m² (3,057 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 Pump33.2 kW113,283 BTU/h (9.44 Tons)
Annual Electricity Usage24,929 kWh/yrDelivers 84,760 kWh Heat (SCOP 3.4)
Savings vs Direct Electric59,831 kWh/yrSpecific Load: 114.8 W/m²
Electrical Circuit (230V)70 A BreakerPeak Compressor Input: 12.77 kW
Thermal & Electrical Specification Table (284 m² / 3,057 sq ft)
| Heated Floor Area | 284 m² (3,057 sq ft) |
| Climate Zone & Design Outdoor Temp | Nordic / Scandinavia (-20°C Design, SE/NO/FI/DK) |
| Building Insulation Envelope | Older Uninsulated Building (85 W/m² Base) (114.8 W/m² Peak) |
| Peak Space Heating Load | 32.6 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 33.2 kW (113,283 BTU/h · 9.44 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 3.4 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 84,760 kWh Heat → 24,929 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 284 m² (3057 sq ft) house?
For a 284 m² (3057 sq ft) building with Older Uninsulated Building (85 W/m² Base) in Nordic / Scandinavia (-20°C Design, SE/NO/FI/DK), the peak space heating load is 32.6 kW (114.8 W/m²). Including domestic hot water allowance, a 33.2 kW (113,283 BTU/h / 9.44 Ton) heat pump is recommended.
How many kWh of electricity does a 33.2 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 24,929 kWh of electricity per year to deliver 84,760 kWh of heat — saving 59,831 kWh/year compared to direct electric radiators.
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