Heat Pump Sizing for 412 m² (4,435 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 Pump46.1 kW157,300 BTU/h (13.11 Tons)
Annual Electricity Usage31,221 kWh/yrDelivers 109,272 kWh Heat (SCOP 3.5)
Savings vs Direct Electric78,051 kWh/yrSpecific Load: 110.5 W/m²
Electrical Circuit (230V)100 A BreakerPeak Compressor Input: 17.07 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 | US North & Canada Cold (-18°C Design, NY/IL/MI/ON) |
| Building Insulation Envelope | Older Uninsulated Building (85 W/m² Base) (110.5 W/m² Peak) |
| Peak Space Heating Load | 45.53 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 46.1 kW (157,300 BTU/h · 13.11 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 3.5 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 109,272 kWh Heat → 31,221 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 Older Uninsulated Building (85 W/m² Base) in US North & Canada Cold (-18°C Design, NY/IL/MI/ON), the peak space heating load is 45.53 kW (110.5 W/m²). Including domestic hot water allowance, a 46.1 kW (157,300 BTU/h / 13.11 Ton) heat pump is recommended.
How many kWh of electricity does a 46.1 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 31,221 kWh of electricity per year to deliver 109,272 kWh of heat — saving 78,051 kWh/year compared to direct electric radiators.
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