Heat Pump Sizing for 190 m² (2,045 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 Pump9.0 kW30,709 BTU/h (2.56 Tons)
Annual Electricity Usage2,601 kWh/yrDelivers 11,704 kWh Heat (SCOP 4.5)
Savings vs Direct Electric9,103 kWh/yrSpecific Load: 44.0 W/m²
Electrical Circuit (230V)15 A BreakerPeak Compressor Input: 2.43 kW
Thermal & Electrical Specification Table (190 m² / 2,045 sq ft)
| Heated Floor Area | 190 m² (2,045 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 | 8.36 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 9.0 kW (30,709 BTU/h · 2.56 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 4.5 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 11,704 kWh Heat → 2,601 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 190 m² (2045 sq ft) house?
For a 190 m² (2045 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 8.36 kW (44.0 W/m²). Including domestic hot water allowance, a 9.0 kW (30,709 BTU/h / 2.56 Ton) heat pump is recommended.
How many kWh of electricity does a 9.0 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 2,601 kWh of electricity per year to deliver 11,704 kWh of heat — saving 9,103 kWh/year compared to direct electric radiators.
Compare Other Home Sizes & Climate Zones
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