AIR SOURCE HEAT PUMPS

An air source heat pump takes warmth from the outside air, even in winter and transfers it into your home. It works a bit like a fridge in reverse: instead of pushing heat out, it pulls it in. Electricity powers the pump, which compresses and concentrates this heat to provide central heating and hot water. Because it moves heat rather than generating it directly, it’s far more efficient than traditional boilers, delivering up to three times more energy than it consumes in electricity.

Yes. Modern air source heat pumps are designed to work efficiently even in cold conditions. They can extract heat from air temperatures as low as -15°C, making them perfectly suited to Scotland and the wider UK climate. While performance is highest in milder conditions, they continue to deliver reliable heating in the depths of winter. The key is correct system design, choosing the right size unit and ensuring your home is well insulated, so you get consistent warmth without overworking the system.

Savings vary depending on your current heating system, energy use, and tariff. If you currently heat with electric, oil, or LPG, the savings can be substantial, potentially hundreds of pounds each year. Homes switching from gas can still benefit by reducing carbon emissions and protecting against rising fuel prices. Many households pair heat pumps with solar panels and a battery to maximise self-generated electricity, cut bills even further, and reduce reliance on the grid. Finance options and government incentives can also improve payback periods.

This is a common concern, but modern heat pumps are surprisingly quiet. They make a low humming sound when running, similar to a fridge or an air conditioning unit. For most homes, this is barely noticeable, especially when installed outside in the garden or mounted discreetly on an exterior wall. Manufacturers continue to make units quieter year on year, and proper installation further reduces noise. In short, a well-chosen, correctly fitted system should not cause disruption for you or your neighbours.

In most cases, no. Air source heat pumps fall under permitted development rights in the UK, meaning they don’t usually require planning permission. However, there are some exceptions, particularly for listed buildings, flats, or homes in conservation areas. It’s always worth checking with your local planning authority. At LIME, we handle all the checks and paperwork for you, so the process is as smooth as possible. Our team ensures your system is compliant before installation begins.

A high-quality heat pump typically lasts 15–20 years, provided it is maintained properly. This lifespan is comparable to, and often longer than traditional boilers. Because there are fewer moving parts and no combustion process, heat pumps experience less wear and tear. At LIME, we only install premium systems from trusted global manufacturers, backed by strong warranties. With simple annual servicing, your heat pump can deliver efficient, reliable heating for decades, giving you both peace of mind and long-term value.

Air source heat pumps are far more efficient than gas, oil, or electric boilers. For every unit of electricity a heat pump uses, it can deliver up to three units of heat. This efficiency means running costs are often lower than traditional systems, especially for homes moving away from oil, LPG, or direct electric heating. Electricity prices are higher than gas, but when combined with renewable generation (like solar) and smart tariffs, heat pumps become extremely cost-effective. They also offer more stable long-term costs compared to volatile fossil fuel markets.

Heat pumps significantly reduce carbon emissions. Unlike gas or oil boilers, they don’t burn fossil fuels, they use electricity to transfer natural heat from the air. Even when powered by grid electricity, they are far more efficient than direct electric heating. And as the UK’s grid becomes cleaner with more renewable generation, the carbon savings will only increase. Pairing your heat pump with solar panels makes the system even greener, allowing you to run your home on clean, self-generated power.

Yes. Air source heat pumps can supply both central heating and domestic hot water. The system includes a hot water cylinder to store water for showers, taps, and household use. Heat pumps typically run at lower flow temperatures than boilers, so radiators may need to be upgraded or underfloor heating installed to get the most efficiency. Our team designs each system specifically for your home, ensuring both heating and hot water meet your family’s needs all year round.

At LIME, we make switching to a heat pump refreshingly simple. From your first conversation to final installation, we handle everything, surveys, design, permissions, installation, and aftercare. You’ll get clear advice, premium products, and transparent pricing with no jargon or hidden extras. Once your heat pump is running, we provide full monitoring, expert support, and servicing options to keep your system performing at its best. With us, you’re not just buying a product you’re getting a trusted partner in your energy journey.