Do Ground Source Heat Pumps Work in Winter?
Ground source heat pumps are among the most reliable heating systems during winter months.
How GSHPs Perform in Winter
Yes, ground source heat pumps work excellently in winter—in fact, this is their key advantage over air source heat pumps. The ground temperature remains relatively constant throughout the year.
Above Ground
-10°C to +30°C
UK temperature variation
Underground (1-2m)
10-12°C
Stable year-round
Winter Performance Advantages
- Consistent efficiency: COP remains at 4.0-4.5 regardless of outside temperature
- No defrost cycles: Unlike air source, no energy wasted defrosting
- Reliable heat output: Full heating capacity available even at -15°C
- Lower running costs: Better winter efficiency means lower bills when you need heat most
Comparing Winter Performance
GSHP vs ASHP at -5°C
Ground Source: COP 4.0-4.5 (no change)
Air Source: COP 2.5-3.0 (reduced efficiency)
Ground source can be 30-50% more efficient than air source in very cold weather.
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Get a Free Quote
Book a free, no-obligation home survey.
Stay Warm All Winter
Discover how a ground source heat pump can provide reliable, efficient heating throughout the coldest months.
