Heat Pump Sizing for 32 m² (344 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 Pump4.1 kW13,990 BTU/h (1.17 Tons)
Annual Electricity Usage2,427 kWh/yrDelivers 8,496 kWh Heat (SCOP 3.5)
Savings vs Direct Electric6,069 kWh/yrSpecific Load: 110.5 W/m²
Electrical Circuit (230V)10 A BreakerPeak Compressor Input: 1.52 kW
Thermal & Electrical Specification Table (32 m² / 344 sq ft)
| Heated Floor Area | 32 m² (344 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 | 3.54 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 4.1 kW (13,990 BTU/h · 1.17 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 3.5 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 8,496 kWh Heat → 2,427 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 32 m² (344 sq ft) house?
For a 32 m² (344 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 3.54 kW (110.5 W/m²). Including domestic hot water allowance, a 4.1 kW (13,990 BTU/h / 1.17 Ton) heat pump is recommended.
How many kWh of electricity does a 4.1 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 2,427 kWh of electricity per year to deliver 8,496 kWh of heat — saving 6,069 kWh/year compared to direct electric radiators.
Compare Other Home Sizes & Climate Zones
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