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Heat pumps in the cold; myths vs facts

Winter in England can be damp and occasionally freezing, causing many homeowners to wonder whether a heat pump will keep them truly warm. We get it—nobody wants to shiver indoors! In this post, we’ll separate fact from fiction about using heat pumps in colder conditions and share insights from our director, Oliver Larsson, who comes from Sweden—a place where winters are much harsher and where heat pumps have long been a standard household fixture.

Understanding the climate of England

Although the south of England generally experiences milder winters compared to the north, temperatures can still drop below freezing on frosty nights. Conditions may not be as severe as in northern Europe, but you still want a reliable system that ensures comfort. Luckily, modern heat pumps are more than capable of handling these temperature dips—particularly when they’re sized and installed correctly.

Common myths about heat pumps in cold weather

Myth #1: “Heat pumps don’t provide enough heat in winter”
Fact: Today’s heat pumps can extract heat even when the temperature falls below freezing. Many newer models can operate efficiently down to -15°C. Given that the south of England rarely stays below -5°C for extended periods, a well-chosen heat pump has no trouble keeping a home snug.

Myth #2: “They’ll cost a fortune to run in the cold”
Fact: Any heating system works a bit harder in colder weather, but heat pumps remain more energy-efficient than traditional electric heaters or older boilers. Good insulation and a smart thermostat can help you maintain a cozy home while potentially saving on monthly bills compared to other heating methods.

Myth #3: “You need a backup heating system”
Fact:
If the heat pump system is designed corrrectly, no back up is required. A properly sized heat pump is more than capable of handling typical winter lows without the need for supplementary heating. The secret? Working with an experienced installer who matches the system to your home’s needs.

Myth #4: “All heat pumps are the same”
Fact: Not all heat pumps share identical technology. There are differences between air-source and ground-source heat pumps, and innovations like inverter-driven compressors have drastically improved cold-weather performance. Both are able to keep a home warm if designed and installed properly.


How heat pumps perform during winter in England

Heat pumps capture heat from outside air or the ground, for ground-source systems, and transfer it indoors through a refrigeration process. Even when temperatures hover around or slightly below zero, there’s enough thermal energy to be harnessed. Many of today’s units maintain a COP (Coefficient of Performance) of 2.0 to 3.0 in cold weather—meaning they generate two to three times more heat than the electrical energy they consume.

Real-world example:

  • Home in Hampshire: A family reported stable indoor warmth during a chilly spell that dipped below freezing, plus a noticeable drop in their monthly energy bill after installing a ground source heat pimp.
  • Case in Berkhampstead: A homeowner who replaced an outdated gas boiler with a high-efficiency heat pump.

Tips for maximizing heat pump efficiency

1) Get the right size

A heat pump that’s too small will struggle when it’s cold; too large, and you risk inefficiency. Ensure you work with installers who will size the system for your specific property. This is done through a heat loss calculation to understand requirements, and proper design.

2) Heating distribution system

The heating distribution system (radiators, underfloor heating, fan coils etc.) dictates how heat moves through your home. Heat pumps operate at a lower temperature than fossil fuel based systems. The distribution system should be adapted to this to reduce running costs

3) Insulate and draft-proof

Even the best system can’t offset major heat loss. Proper loft and wall insulation, along with sealing any drafty doors or windows, plays a huge role in keeping warmth inside.

4) Use smart controls

A smart thermostat can be programmed for your daily schedule, keeping the temperature comfortable when you’re home and saving energy when you’re out or asleep.

5) Regular maintenance

Simple tasks like cleaning or replacing filters, plus yearly professional check-ups, will keep your heat pump at peak performance – helping you save on bills in the long run.


A word from company director, Oliver Larsson

As someone who grew up in Sweden, I’ve experienced how reliable and efficient heat pumps can be—even in extended freezing conditions. That’s why I’m so passionate about helping homeowners in England enjoy the same warmth and savings. While Swedish winters are certainly harsher than what you typically face here, heat pumps remain a staple in homes throughout Sweden. There’s no reason you can’t have that same peace of mind!


The future of heat pumps in the UK

Heat pumps have a proven track record abroad in far colder places than England, so it’s no surprise the UK government is encouraging their adoption to help reduce carbon emissions. There are incentives and rebate schemes available—like the Boiler Upgrade Scheme—that could make now the perfect time to invest in a greener, low-carbon heating solution.


Conclusion: Heat pumps and cold weather? No problem!

There’s no need to dismiss heat pumps because of a few frosty nights. With a knowledgeable installer, a well-insulated home, and heat pump technology, you’ll stay toasty during the coldest days, often at a lower long-term cost than older, less efficient systems.

Ready to learn more? Get in touch with our team to see how you can switch to an energy-efficient, eco-friendly heating system that keeps you warm all winter.

Simon Checketts Regional Sales Manager

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