Heat Pump Sizing for 172 m² (1,851 sq ft) — US Sunbelt & Mediterranean (TX/FL/CA/ES/IT)
Thermal heat loss calculation, recommended heat pump capacity (kW, BTU/h & HVAC Tons), SCOP efficiency, and annual electricity consumption.
Recommended Heat Pump8.7 kW29,686 BTU/h (2.47 Tons)
Annual Electricity Usage2,744 kWh/yrDelivers 12,075 kWh Heat (SCOP 4.4)
Savings vs Direct Electric9,331 kWh/yrSpecific Load: 46.8 W/m²
Electrical Circuit (230V)15 A BreakerPeak Compressor Input: 2.42 kW
Thermal & Electrical Specification Table (172 m² / 1,851 sq ft)
| Heated Floor Area | 172 m² (1,851 sq ft) |
| Climate Zone & Design Outdoor Temp | US Sunbelt & Mediterranean (TX/FL/CA/ES/IT) |
| Building Insulation Envelope | Standard Double-Glazed Insulation (55 W/m² Base) (46.8 W/m² Peak) |
| Peak Space Heating Load | 8.05 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 8.7 kW (29,686 BTU/h · 2.47 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 4.4 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 12,075 kWh Heat → 2,744 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 172 m² (1851 sq ft) house?
For a 172 m² (1851 sq ft) building with Standard Double-Glazed Insulation (55 W/m² Base) in US Sunbelt & Mediterranean (TX/FL/CA/ES/IT), the peak space heating load is 8.05 kW (46.8 W/m²). Including domestic hot water allowance, a 8.7 kW (29,686 BTU/h / 2.47 Ton) heat pump is recommended.
How many kWh of electricity does a 8.7 kW heat pump use per year?
With a Seasonal Coefficient of Performance (SCOP) of 4.4 over 1500 full-load equivalent heating hours, the heat pump consumes approximately 2,744 kWh of electricity per year to deliver 12,075 kWh of heat — saving 9,331 kWh/year compared to direct electric radiators.
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