Heat Pump Sizing for 122 m² (1,313 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 Pump14.1 kW48,111 BTU/h (4.01 Tons)
Annual Electricity Usage9,243 kWh/yrDelivers 32,352 kWh Heat (SCOP 3.5)
Savings vs Direct Electric23,109 kWh/yrSpecific Load: 110.5 W/m²
Electrical Circuit (230V)30 A BreakerPeak Compressor Input: 5.22 kW
Thermal & Electrical Specification Table (122 m² / 1,313 sq ft)
| Heated Floor Area | 122 m² (1,313 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 | 13.48 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 14.1 kW (48,111 BTU/h · 4.01 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 3.5 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 32,352 kWh Heat → 9,243 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 122 m² (1313 sq ft) house?
For a 122 m² (1313 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 13.48 kW (110.5 W/m²). Including domestic hot water allowance, a 14.1 kW (48,111 BTU/h / 4.01 Ton) heat pump is recommended.
How many kWh of electricity does a 14.1 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 9,243 kWh of electricity per year to deliver 32,352 kWh of heat — saving 23,109 kWh/year compared to direct electric radiators.
Compare Other Home Sizes & Climate Zones
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