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❄️ Heat Pump & HVAC Thermal Load · EN 12831 & ACCA Manual J Reference

Heat Pump Sizing for 154 m² (1,658 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 Pump7.6 kW25,932 BTU/h (2.16 Tons)
Annual Electricity Usage4,807 kWh/yrDelivers 16,824 kWh Heat (SCOP 3.5)
Savings vs Direct Electric12,017 kWh/yrSpecific Load: 45.5 W/m²
Electrical Circuit (230V)16 A BreakerPeak Compressor Input: 2.81 kW

Thermal & Electrical Specification Table (154 m² / 1,658 sq ft)

Heated Floor Area154 m² (1,658 sq ft)
Climate Zone & Design Outdoor TempUS North & Canada Cold (-18°C Design, NY/IL/MI/ON)
Building Insulation EnvelopeModern / New Build Insulation (35 W/m² Base) (45.5 W/m² Peak)
Peak Space Heating Load7.01 kW Thermal
Recommended Heat Pump Output (Incl. DHW)7.6 kW (25,932 BTU/h · 2.16 Tons)
Seasonal Coefficient of Performance (SCOP)3.5 (340%–450% Seasonal Efficiency)
Annual Heat Demand vs Electricity Consumed16,824 kWh Heat → 4,807 kWh Electricity

Frequently Asked Questions

What kW size heat pump do I need for a 154 m² (1658 sq ft) house?

For a 154 m² (1658 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 7.01 kW (45.5 W/m²). Including domestic hot water allowance, a 7.6 kW (25,932 BTU/h / 2.16 Ton) heat pump is recommended.

How many kWh of electricity does a 7.6 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 4,807 kWh of electricity per year to deliver 16,824 kWh of heat — saving 12,017 kWh/year compared to direct electric radiators.