Heat Pump Sizing for 508 m² (5,468 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 Pump15.7 kW53,571 BTU/h (4.46 Tons)
Annual Electricity Usage5,161 kWh/yrDelivers 22,710 kWh Heat (SCOP 4.4)
Savings vs Direct Electric17,549 kWh/yrSpecific Load: 29.8 W/m²
Electrical Circuit (230V)25 A BreakerPeak Compressor Input: 4.36 kW
Thermal & Electrical Specification Table (508 m² / 5,468 sq ft)
| Heated Floor Area | 508 m² (5,468 sq ft) |
| Climate Zone & Design Outdoor Temp | US Sunbelt & Mediterranean (TX/FL/CA/ES/IT) |
| Building Insulation Envelope | Modern / New Build Insulation (35 W/m² Base) (29.8 W/m² Peak) |
| Peak Space Heating Load | 15.14 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 15.7 kW (53,571 BTU/h · 4.46 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 4.4 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 22,710 kWh Heat → 5,161 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 508 m² (5468 sq ft) house?
For a 508 m² (5468 sq ft) building with Modern / New Build Insulation (35 W/m² Base) in US Sunbelt & Mediterranean (TX/FL/CA/ES/IT), the peak space heating load is 15.14 kW (29.8 W/m²). Including domestic hot water allowance, a 15.7 kW (53,571 BTU/h / 4.46 Ton) heat pump is recommended.
How many kWh of electricity does a 15.7 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 5,161 kWh of electricity per year to deliver 22,710 kWh of heat — saving 17,549 kWh/year compared to direct electric radiators.
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