Do Heat Pumps Really Work in the Scottish Winter? Your Questions Answered

  • December 5, 2025

Let’s be honest – winter in the North of Scotland isn’t for the faint-hearted. Between horizontal rain, frozen pipes, and defrosting the car with a kettle (don’t try that at home), it’s only natural to wonder: “Can a heat pump really keep me warm when it’s minus-something and the dog refuses to go out?” Spoiler: Yes,…

    Why you can trust our content

    We know the plumbing and renewable energy industry can feel overwhelming, especially with conflicting advice and outdated information online. That’s why we base everything we do on clarity, expertise, and trusted sources:

    • Highly trained heating and plumbing engineers with extensive hands-on experience in boiler installation, heat pumps, underfloor heating, and full system maintenance
    • Real project knowledge gained from hundreds of successful installs, performance assessments, servicing reports, and long-term customer results
    • Reliable industry standards and accredited guidance, including UK building regulations, MCS renewable accreditation, Gas Safe requirements, and manufacturer best-practice specifications

    At a glance

    Yes — modern air source heat pumps work efficiently even in temperatures as low as -25°C, keeping your home warm through Moray, Aberdeenshire and Highland winters.

    Not at all. A properly sized and designed system will keep your home cosy, even when the garden is white with frost.

    Almost certainly. Most homes can be retrofitted — sometimes with small upgrades like improved insulation or larger radiators.

    Bills naturally rise in winter, but heat pumps still deliver far more heat per unit of electricity than oil, gas or electric heaters.

    Highly recommended. Solar and storage can significantly cut running costs all year round and work brilliantly alongside heat pumps.

    Let’s be honest – winter in the North of Scotland isn’t for the faint-hearted. Between horizontal rain, frozen pipes, and defrosting the car with a kettle (don’t try that at home), it’s only natural to wonder:

    “Can a heat pump really keep me warm when it’s minus-something and the dog refuses to go out?”
     Spoiler: Yes, it can – and quite impressively too.

    At Plumbing & Renewables, we’ve fitted air source heat pumps in some of the most weather-hardened corners of Moray, Aberdeenshire and the Highlands. Here’s what you need to know.

    ❄️ “But What If It’s Freezing Outside?”

    Good question. Air source heat pumps work by drawing heat from the air – even when it’s chilly. Modern units can pull warmth from air as cold as -25°C. It sounds like wizardry, but it’s really just clever engineering.

    So yes, even when your nose hairs freeze on the school run, your heat pump will be quietly getting on with its job!

    🔍 “Does It Struggle on Frosty Days?”

    Even on a crisp, frosty morning, heat pumps can still deliver. They might need to run a bit longer to keep your home cosy, but that’s all factored in.

    The key is good system design – which is where we come in. It’s not about sticking any old unit on the wall and hoping for the best. We size everything properly including the heat pump, hot water tank and radiators to ensure your home is warm.

    It is not just design however, installation and informative customer handovers are essential to enduring customer satisfaction with the system.  Running a heat pump system is a bit different from an oil or gas system, so making sure homeowners have all the information they need to get the best out of their system is key too. We are only a phone call away for extra advice when needed.

    🏡 “Is My Home Suitable, Though?”

    We hear this a lot – especially from folks in older homes or charming granite cottages that seem to have their own internal weather system.

    The good news is: retrofitting is definitely possible. We’ll take a look at your current setup and let you know if tweaks are needed – maybe bigger radiators or loft insulation. We’ll never recommend anything you don’t need, and we’re used to working in all sorts of homes – from modern new builds to 200 year old homes, and everything in between.

    💰 “Will It Cost Me More in Winter?”

    Heat pumps run on electricity, but they’re incredibly efficient – often delivering 3–4 units of heat for every 1 unit of electricity. In winter, that efficiency dips a little (as do most of us), but it’s still a huge improvement over oil, LPG or electric heating. All heating bills go up in the winter months and it can be advisable to take a monthly payment plan where your costs are spread equally throughout the year.

    Pairing a heat pump with solar panels and battery storage is a bit like pairing whisky with a log fire – highly recommended and surprisingly satisfying saving your money year round on running costs. Please contact us and ask how you can save money on your bills with solar and / or battery.

    🔧 “Do I Need to Do Anything When It Gets Cold?”

    Aside from the usual winter rituals – finding your scraper and arguing over the thermostat – not really.

    Heat pumps manage themselves pretty well. In very cold weather, the outdoor unit may go into defrost mode, which is totally normal (and not a sign it’s given up). We offer regular servicing to keep things ticking along nicely over winter.

    ✅ Local Experience, Family Values

    We’re a family-run business, and we’ve seen it all – including installations during snow flurries, lashing rain and glorious sunshine. Whatever the situation, we take pride in doing things properly, keeping things tidy, and making sure you’re comfortable from start to finish.

    What’s more, most of our own team have heat pumps installed at home, and we’ve completed hundreds of local installations across Moray, Aberdeenshire and the Highlands. If you’d like to ask questions directly to other homeowners or even visit a local installation to see how it’s working in the real world, just let us know – we’re more than happy to arrange it.

    Ready to Warm Up the Right Way?

    If you’re thinking about switching to a heat pump and want honest, friendly advice with no pushy sales, please get in touch

    Related articles

    • Estimate Your Savings

    Which option best describes your home?

    Bungalow

    Semi-Detached

    Detached

    Flat

    Terraced

    At a glance

    Yes — modern air source heat pumps work efficiently even in temperatures as low as -25°C, keeping your home warm through Moray, Aberdeenshire and Highland winters.

    Not at all. A properly sized and designed system will keep your home cosy, even when the garden is white with frost.

    Almost certainly. Most homes can be retrofitted — sometimes with small upgrades like improved insulation or larger radiators.

    Bills naturally rise in winter, but heat pumps still deliver far more heat per unit of electricity than oil, gas or electric heaters.

    Highly recommended. Solar and storage can significantly cut running costs all year round and work brilliantly alongside heat pumps.

    Let’s be honest – winter in the North of Scotland isn’t for the faint-hearted. Between horizontal rain, frozen pipes, and defrosting the car with a kettle (don’t try that at home), it’s only natural to wonder:

    “Can a heat pump really keep me warm when it’s minus-something and the dog refuses to go out?”
     Spoiler: Yes, it can – and quite impressively too.

    At Plumbing & Renewables, we’ve fitted air source heat pumps in some of the most weather-hardened corners of Moray, Aberdeenshire and the Highlands. Here’s what you need to know.

    ❄️ “But What If It’s Freezing Outside?”

    Good question. Air source heat pumps work by drawing heat from the air – even when it’s chilly. Modern units can pull warmth from air as cold as -25°C. It sounds like wizardry, but it’s really just clever engineering.

    So yes, even when your nose hairs freeze on the school run, your heat pump will be quietly getting on with its job!

    🔍 “Does It Struggle on Frosty Days?”

    Even on a crisp, frosty morning, heat pumps can still deliver. They might need to run a bit longer to keep your home cosy, but that’s all factored in.

    The key is good system design – which is where we come in. It’s not about sticking any old unit on the wall and hoping for the best. We size everything properly including the heat pump, hot water tank and radiators to ensure your home is warm.

    It is not just design however, installation and informative customer handovers are essential to enduring customer satisfaction with the system.  Running a heat pump system is a bit different from an oil or gas system, so making sure homeowners have all the information they need to get the best out of their system is key too. We are only a phone call away for extra advice when needed.

    🏡 “Is My Home Suitable, Though?”

    We hear this a lot – especially from folks in older homes or charming granite cottages that seem to have their own internal weather system.

    The good news is: retrofitting is definitely possible. We’ll take a look at your current setup and let you know if tweaks are needed – maybe bigger radiators or loft insulation. We’ll never recommend anything you don’t need, and we’re used to working in all sorts of homes – from modern new builds to 200 year old homes, and everything in between.

    💰 “Will It Cost Me More in Winter?”

    Heat pumps run on electricity, but they’re incredibly efficient – often delivering 3–4 units of heat for every 1 unit of electricity. In winter, that efficiency dips a little (as do most of us), but it’s still a huge improvement over oil, LPG or electric heating. All heating bills go up in the winter months and it can be advisable to take a monthly payment plan where your costs are spread equally throughout the year.

    Pairing a heat pump with solar panels and battery storage is a bit like pairing whisky with a log fire – highly recommended and surprisingly satisfying saving your money year round on running costs. Please contact us and ask how you can save money on your bills with solar and / or battery.

    🔧 “Do I Need to Do Anything When It Gets Cold?”

    Aside from the usual winter rituals – finding your scraper and arguing over the thermostat – not really.

    Heat pumps manage themselves pretty well. In very cold weather, the outdoor unit may go into defrost mode, which is totally normal (and not a sign it’s given up). We offer regular servicing to keep things ticking along nicely over winter.

    ✅ Local Experience, Family Values

    We’re a family-run business, and we’ve seen it all – including installations during snow flurries, lashing rain and glorious sunshine. Whatever the situation, we take pride in doing things properly, keeping things tidy, and making sure you’re comfortable from start to finish.

    What’s more, most of our own team have heat pumps installed at home, and we’ve completed hundreds of local installations across Moray, Aberdeenshire and the Highlands. If you’d like to ask questions directly to other homeowners or even visit a local installation to see how it’s working in the real world, just let us know – we’re more than happy to arrange it.

    Ready to Warm Up the Right Way?

    If you’re thinking about switching to a heat pump and want honest, friendly advice with no pushy sales, please get in touch

    Related articles

    Which option best describes your home?

    Bungalow

    Semi-Detached

    Detached

    Flat

    Terraced