Heat Pump Sizing for 556 m² (5,985 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 Pump25.1 kW85,645 BTU/h (7.14 Tons)
Annual Electricity Usage7,610 kWh/yrDelivers 34,244 kWh Heat (SCOP 4.5)
Savings vs Direct Electric26,634 kWh/yrSpecific Load: 44.0 W/m²
Electrical Circuit (230V)40 A BreakerPeak Compressor Input: 6.78 kW
Thermal & Electrical Specification Table (556 m² / 5,985 sq ft)
| Heated Floor Area | 556 m² (5,985 sq ft) |
| Climate Zone & Design Outdoor Temp | Australia & Mild APAC (Sydney/Melbourne/Tokyo) |
| Building Insulation Envelope | Standard Double-Glazed Insulation (55 W/m² Base) (44.0 W/m² Peak) |
| Peak Space Heating Load | 24.46 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 25.1 kW (85,645 BTU/h · 7.14 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 4.5 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 34,244 kWh Heat → 7,610 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 556 m² (5985 sq ft) house?
For a 556 m² (5985 sq ft) building with Standard Double-Glazed Insulation (55 W/m² Base) in Australia & Mild APAC (Sydney/Melbourne/Tokyo), the peak space heating load is 24.46 kW (44.0 W/m²). Including domestic hot water allowance, a 25.1 kW (85,645 BTU/h / 7.14 Ton) heat pump is recommended.
How many kWh of electricity does a 25.1 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 7,610 kWh of electricity per year to deliver 34,244 kWh of heat — saving 26,634 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 Pump556 m² in Nordic / Scandinavia556 m² in Central Europe / DACH556 m² in UK & Temperate Maritime556 m² in US North & Canada Cold556 m² in US Sunbelt & Mediterranean