Heat Pump Sizing for 356 m² (3,832 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 Pump16.3 kW55,618 BTU/h (4.63 Tons)
Annual Electricity Usage4,872 kWh/yrDelivers 21,924 kWh Heat (SCOP 4.5)
Savings vs Direct Electric17,052 kWh/yrSpecific Load: 44.0 W/m²
Electrical Circuit (230V)25 A BreakerPeak Compressor Input: 4.41 kW
Thermal & Electrical Specification Table (356 m² / 3,832 sq ft)
| Heated Floor Area | 356 m² (3,832 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 | 15.66 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 16.3 kW (55,618 BTU/h · 4.63 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 4.5 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 21,924 kWh Heat → 4,872 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 356 m² (3832 sq ft) house?
For a 356 m² (3832 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 15.66 kW (44.0 W/m²). Including domestic hot water allowance, a 16.3 kW (55,618 BTU/h / 4.63 Ton) heat pump is recommended.
How many kWh of electricity does a 16.3 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 4,872 kWh of electricity per year to deliver 21,924 kWh of heat — saving 17,052 kWh/year compared to direct electric radiators.
Compare Other Home Sizes & Climate Zones
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