Heat Pump Sizing for 144 m² (1,550 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 Pump7.1 kW24,226 BTU/h (2.02 Tons)
Annual Electricity Usage4,491 kWh/yrDelivers 15,720 kWh Heat (SCOP 3.5)
Savings vs Direct Electric11,229 kWh/yrSpecific Load: 45.5 W/m²
Electrical Circuit (230V)15 A BreakerPeak Compressor Input: 2.63 kW
Thermal & Electrical Specification Table (144 m² / 1,550 sq ft)
| Heated Floor Area | 144 m² (1,550 sq ft) |
| Climate Zone & Design Outdoor Temp | US North & Canada Cold (-18°C Design, NY/IL/MI/ON) |
| Building Insulation Envelope | Modern / New Build Insulation (35 W/m² Base) (45.5 W/m² Peak) |
| Peak Space Heating Load | 6.55 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 7.1 kW (24,226 BTU/h · 2.02 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 3.5 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 15,720 kWh Heat → 4,491 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 144 m² (1550 sq ft) house?
For a 144 m² (1550 sq ft) building with Modern / New Build Insulation (35 W/m² Base) in US North & Canada Cold (-18°C Design, NY/IL/MI/ON), the peak space heating load is 6.55 kW (45.5 W/m²). Including domestic hot water allowance, a 7.1 kW (24,226 BTU/h / 2.02 Ton) heat pump is recommended.
How many kWh of electricity does a 7.1 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 4,491 kWh of electricity per year to deliver 15,720 kWh of heat — saving 11,229 kWh/year compared to direct electric radiators.
Compare Other Home Sizes & Climate Zones
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