Do heat pumps work below freezing?

Key takeaways:

• Yes, despite the misconception, heat pumps work very well below freezing
• Even on days as cold as -25°C when pumps needs to work harder, they are far more energy efficient than gas boilers
• Heat pumps are an eco-friendly and cost-saving heating solution that will keep you cosy all winter long

When winter sets in, many question whether heat pumps can sufficiently heat homes in freezing temperatures. Modern heat pumps, however, are engineered to perform in cold climates, often operating effectively in sub-freezing conditions. Here's how they work and what to consider when selecting one for your home.

Heat Pump Efficiency in Cold Climates

Modern heat pumps are engineered to operate efficiently, even in extreme cold. The Aira Heat Pump can function in temperatures as low as -25°C, while maintaining comfort indoors. Aira heat pumps are designed in Sweden, known for its harsh winters, and where a majority of the population uses heat pumps to sustainably heat their homes. So you can rest assured they can handle UK winters with ease.

For those unusually cold days, our heat pump is fitted with an electric heating element that can assist the compressor to produce enough to keep you cosy even in the harshest winter temperatures.

Factors Impacting Heat Pump Efficiency

In cold weather, heat pumps can lose some efficiency because the external air used to generate heat is colder. Air-source heat pumps, for example, may consume more electricity as they work harder to heat your home. Despite this, they still remain 2-3x more energy-efficient than traditional heating systems when functioning in freezing temperatures.

Proper design and installation also play a crucial role in ensuring heat pump efficiency in winter. A system tailored to your home’s size, insulation, and climate will provide optimal performance, ensuring you stay warm without excessive energy use.

Cost & Energy Savings of Heat Pumps

While heat pumps may consume more energy in extreme cold, modern units, especially cold-climate models, continue to operate efficiently.

Another myth is that heat pumps are costly to run in cold climates. While energy consumption increases in freezing weather, heat pumps remain 25% more cost-effective than traditional systems, offering long-term savings on energy bills. Heat pumps often boast efficiency ratings above 400%, far surpassing traditional heating options like gas boilers, which helps save both energy and money over time.

Choosing the Right Heat Pump for Cold Climates

The Aira Heat Pump is designed for low-temperature operation without harming the environment with toxic refrigerants. We use natural R290, also know as propane, that easily allows our heat pump to function even at low temperatures. R290 is a natural hydrocarbon with low environmental impact, so you can stay warm without the guilt.

Conclusion

Modern heat pumps are highly effective in cold climates, even at temperatures as low as -25°C. Their advanced technology, efficiency, and eco-friendliness make them a viable option for homeowners seeking sustainable and reliable heating solutions all winter long.