Heat Pump Sizing for 588 m² (6,329 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 Pump40.6 kW138,533 BTU/h (11.54 Tons)
Annual Electricity Usage12,438 kWh/yrDelivers 55,972 kWh Heat (SCOP 4.5)
Savings vs Direct Electric43,534 kWh/yrSpecific Load: 68.0 W/m²
Electrical Circuit (230V)60 A BreakerPeak Compressor Input: 10.97 kW
Thermal & Electrical Specification Table (588 m² / 6,329 sq ft)
| Heated Floor Area | 588 m² (6,329 sq ft) |
| Climate Zone & Design Outdoor Temp | Australia & Mild APAC (Sydney/Melbourne/Tokyo) |
| Building Insulation Envelope | Older Uninsulated Building (85 W/m² Base) (68.0 W/m² Peak) |
| Peak Space Heating Load | 39.98 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 40.6 kW (138,533 BTU/h · 11.54 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 4.5 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 55,972 kWh Heat → 12,438 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 588 m² (6329 sq ft) house?
For a 588 m² (6329 sq ft) building with Older Uninsulated Building (85 W/m² Base) in Australia & Mild APAC (Sydney/Melbourne/Tokyo), the peak space heating load is 39.98 kW (68.0 W/m²). Including domestic hot water allowance, a 40.6 kW (138,533 BTU/h / 11.54 Ton) heat pump is recommended.
How many kWh of electricity does a 40.6 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 12,438 kWh of electricity per year to deliver 55,972 kWh of heat — saving 43,534 kWh/year compared to direct electric radiators.
Compare Other Home Sizes & Climate Zones
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