Common Misconceptions About Air Source Heat Pumps

As air source heat pumps (ASHPs) become more popular across the UK, with a record-breaking 36,799 installations in 2023, they’re proving to be an efficient, eco-friendly alternative to traditional gas boilers. 

However, there are still many misconceptions about air source heat pumps that can make homeowners unnecessarily hesitant to consider them. 

This article by the heating professionals at Adlår Castra UK debunks common myths surrounding ASHPs, including concerns about their performance in cold weather, noise levels, installation costs, and efficiency, to help you get a clearer picture of what they can really offer.

Myth #1: Air Source Heat Pumps Don’t Work in Cold Weather

The Myth: Many people believe that air source heat pumps become ineffective in colder climates, particularly when temperatures drop below freezing.

The Reality: Modern ASHPs are designed to extract heat from the air outside your home even in cold weather, with most models continuing to operate efficiently in temperatures of -15°C or lower. Advanced technology – such as inverter-driven compressors – allows heat pumps to adjust output based on the outdoor temperature, maintaining performance and energy efficiency. 

The Eco Experts confirm that air source heat pumps remain effective in cold climates and can provide sufficient heating even during the UK’s winter months. In fact, ASHPs are widely used in colder countries where winter temperatures frequently fall below freezing, including Norway and Sweden (who are first and second in the global table for the amount of heat pumps per capita).

Myth #2: Air Source Heat Pumps Are Too Noisy

The Myth: Some homeowners worry that air source heat pumps will create too much noise, disturbing the household and potentially causing issues with neighbours.

The Reality: While early models of ASHPs were known for being loud, modern units have become much quieter. A government review into heat pump noise in 2023 found that residents who lived near a heat pump reported few complaints. 

Today’s air source heat pumps typically operate at a noise level between 40 to 60 decibels, which is the same as an average gas boiler, and comparable to the sound of a quiet refrigerator or background conversation. 

They also come with noise-reduction features, including soundproofing and quieter fan mechanisms, which make them suitable for residential areas. Leading models that incorporate this type of smart technology, such as Adlår’s dual heat pump system, offer whisper quiet operation at any kW output.

Myth #3: Air Source Heat Pumps Are Too Expensive to Install

The Myth: Many people assume that installing an air source heat pump is prohibitively expensive, especially when compared to traditional heating systems like gas boilers.

The Reality: While the upfront cost of ASHPs is higher than that of gas boilers, the UK government offers financial incentives to make these systems more accessible. The Boiler Upgrade Scheme provides grants of up to £7,500 to help offset the installation costs of heat pumps for eligible homes in England and Wales. This can significantly reduce the initial expense, bringing ASHPs within reach for many households.

In addition to these grants, ASHPs typically lower heating costs by 20 – 40% compared to gas boilers, creating long-term savings that can offset the initial investment.

Myth #4: Air Source Heat Pumps Aren’t Efficient Enough to Heat a Home

The Myth: Some believe that ASHPs are not powerful enough to fully heat a home, particularly larger or older properties.

The Reality: When properly sized and installed by MCS registered experts, air source heat pumps are highly efficient and more than capable of heating a home effectively. ASHPs often have a Coefficient of Performance (COP) of 3 – 4, meaning they are between 300% – 400% efficient and can produce 3 – 4 units of heat for every unit of electricity used. 

This level of efficiency is considerably higher than traditional heating systems – for example, according to Greenmatch, the most efficient boilers in the UK are only between 93% and 98% efficient.

Proper home insulation and professional installation can ensure that heat pumps operate at maximum efficiency. In larger homes, ASHPs can be paired with underfloor heating or efficient radiators to enhance heat distribution. The Energy Saving Trust confirms that, when set up correctly, heat pumps are effective for all types of homes, including flats, terraced houses, and even large properties. 

Myth #5: Heat Pumps Are Only Suitable for New or Well-Insulated Homes

The Myth: There’s a misconception that ASHPs are only suitable for new or well-insulated properties.

The Reality: While heat pumps do work best in insulated homes, the same is true for any heating system, and air source heat pumps absolutely can be installed in older properties. Many homeowners find that a few upgrades to reduce heat loss – such as topping up your home’s wall, floor and loft insulation insulation or upgrading your windows – can help improve the efficiency of ASHPs in older homes.

As part of the initial consultation for Adlår’s dual heat pump system, our professional installer will conduct a free site survey to assess your home’s suitability and recommend any improvements that may help optimise heat pump performance.

For anyone interested in finding out more, this article from The Guardian discusses whether older homes are suitable for heat pumps in greater detail, while Historic England offers advice on installing heat pumps in historic buildings here.

Myth #6: Air Source Heat Pumps Are Only for Heating

The Myth: Some people think that air source heat pumps can only provide heating and not cooling.

The Reality: Many modern ASHPs, including our dual heat pump system, are designed to provide heating in winter and cooling in summer, making them a versatile climate control solution. With this capability, an ASHP can replace the need for separate heating and cooling systems, offering year-round comfort and reducing your overall energy consumption.

Myth #7: Maintenance Costs for Heat Pumps Are High

The Myth: Homeowners sometimes worry that ASHPs require frequent maintenance, leading to high ongoing costs.

The Reality: Air source heat pumps are relatively low-maintenance compared to traditional gas boilers. Basic maintenance includes periodic filter cleaning and an annual inspection to ensure efficient operation. The Renewable Energy Hub UK highlights that regular heat pump maintenance is straightforward and cost-effective.

Plus, ASHPs generally experience fewer mechanical issues than combustion-based heating systems, which often require more frequent servicing.

Don’t Let Myths Hold You Back – Discover the Real Benefits of Air Source Heat Pumps Today!

Air source heat pumps offer a sustainable, efficient heating solution that can save on energy costs and reduce your household’s carbon footprint. 

While myths surrounding ASHPs still persist, understanding the facts about performance, noise levels, installation costs, and versatility can help homeowners make informed choices. Whether you’re considering a new heating system or simply curious about the comfort and efficiency of dual heat pump systems, don’t let misconceptions hold you back from exploring the benefits of this renewable heating option.

Contact Adlår today for free advice, or download our brochure to find out more.