Heat Pump Sizing for 444 m² (4,779 sq ft) — Australia & Mild APAC (Sydney/Melbourne/Tokyo)
Thermal heat loss calculation, recommended heat pump capacity (kW, BTU/h & HVAC Tons), SCOP efficiency, and annual electricity consumption.
Recommended Heat Pump13.0 kW44,358 BTU/h (3.7 Tons)
Annual Electricity Usage3,867 kWh/yrDelivers 17,402 kWh Heat (SCOP 4.5)
Savings vs Direct Electric13,535 kWh/yrSpecific Load: 28.0 W/m²
Electrical Circuit (230V)20 A BreakerPeak Compressor Input: 3.51 kW
Thermal & Electrical Specification Table (444 m² / 4,779 sq ft)
| Heated Floor Area | 444 m² (4,779 sq ft) |
| Climate Zone & Design Outdoor Temp | Australia & Mild APAC (Sydney/Melbourne/Tokyo) |
| Building Insulation Envelope | Modern / New Build Insulation (35 W/m² Base) (28.0 W/m² Peak) |
| Peak Space Heating Load | 12.43 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 13.0 kW (44,358 BTU/h · 3.7 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 4.5 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 17,402 kWh Heat → 3,867 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 444 m² (4779 sq ft) house?
For a 444 m² (4779 sq ft) building with Modern / New Build Insulation (35 W/m² Base) in Australia & Mild APAC (Sydney/Melbourne/Tokyo), the peak space heating load is 12.43 kW (28.0 W/m²). Including domestic hot water allowance, a 13.0 kW (44,358 BTU/h / 3.7 Ton) heat pump is recommended.
How many kWh of electricity does a 13.0 kW heat pump use per year?
With a Seasonal Coefficient of Performance (SCOP) of 4.5 over 1400 full-load equivalent heating hours, the heat pump consumes approximately 3,867 kWh of electricity per year to deliver 17,402 kWh of heat — saving 13,535 kWh/year compared to direct electric radiators.
Compare Other Home Sizes & Climate Zones
60 m² (646 ft²) Heat Pump80 m² (861 ft²) Heat Pump100 m² (1076 ft²) Heat Pump120 m² (1292 ft²) Heat Pump140 m² (1507 ft²) Heat Pump160 m² (1722 ft²) Heat Pump180 m² (1938 ft²) Heat Pump200 m² (2153 ft²) Heat Pump250 m² (2691 ft²) Heat Pump300 m² (3229 ft²) Heat Pump444 m² in Nordic / Scandinavia444 m² in Central Europe / DACH444 m² in UK & Temperate Maritime444 m² in US North & Canada Cold444 m² in US Sunbelt & Mediterranean