Heat Pump Sizing for 380 m² (4,090 sq ft) — US North & Canada Cold (-18°C Design, NY/IL/MI/ON)
Thermal heat loss calculation, recommended heat pump capacity (kW, BTU/h & HVAC Tons), SCOP efficiency, and annual electricity consumption.
Recommended Heat Pump27.8 kW94,857 BTU/h (7.9 Tons)
Annual Electricity Usage18,631 kWh/yrDelivers 65,208 kWh Heat (SCOP 3.5)
Savings vs Direct Electric46,577 kWh/yrSpecific Load: 71.5 W/m²
Electrical Circuit (230V)60 A BreakerPeak Compressor Input: 10.3 kW
Thermal & Electrical Specification Table (380 m² / 4,090 sq ft)
| Heated Floor Area | 380 m² (4,090 sq ft) |
| Climate Zone & Design Outdoor Temp | US North & Canada Cold (-18°C Design, NY/IL/MI/ON) |
| Building Insulation Envelope | Standard Double-Glazed Insulation (55 W/m² Base) (71.5 W/m² Peak) |
| Peak Space Heating Load | 27.17 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 27.8 kW (94,857 BTU/h · 7.9 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 3.5 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 65,208 kWh Heat → 18,631 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 380 m² (4090 sq ft) house?
For a 380 m² (4090 sq ft) building with Standard Double-Glazed Insulation (55 W/m² Base) in US North & Canada Cold (-18°C Design, NY/IL/MI/ON), the peak space heating load is 27.17 kW (71.5 W/m²). Including domestic hot water allowance, a 27.8 kW (94,857 BTU/h / 7.9 Ton) heat pump is recommended.
How many kWh of electricity does a 27.8 kW heat pump use per year?
With a Seasonal Coefficient of Performance (SCOP) of 3.5 over 2400 full-load equivalent heating hours, the heat pump consumes approximately 18,631 kWh of electricity per year to deliver 65,208 kWh of heat — saving 46,577 kWh/year compared to direct electric radiators.
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