RightAir Solutions is a company that specialises in commercial air conditioning services.
Air source heat pumps are an increasingly popular choice for heating homes across London and the UK. Although they offer benefits like lower carbon emissions and renewable energy use, they are not without drawbacks. This guide from RightAir Solutions looks carefully at the disadvantages of air source heat pumps, providing a balanced overview to help homeowners make an informed decision.
An air source heat pump works by absorbing heat from the outside air and transferring it indoors. It uses a refrigerant system that passes through a compressor and heat exchanger to deliver heating and hot water. While these systems are efficient in many cases, they do face performance limitations, especially during colder months. Air source heat pumps are a recognised low carbon heating solution but they must be matched correctly to property type and household needs to work effectively. Our heat pump installation services ensure every system is designed to maximise performance for each home.
Pro Tip: Position your heat pump carefully. Where you place the external unit affects both performance and noise levels. Always discuss the best location with your installer to balance efficiency and comfort, especially if you live in a built-up area.
One of the main disadvantages of air source heat pumps is the initial cost. Installing a system typically costs around £14,000, depending on factors like property size, heat pump size, and the need for radiator upgrades. Even after grants such as the Boiler Upgrade Scheme are applied, homeowners can still face significant expenses. The need for larger radiators, improved insulation or underfloor heating can add further costs.
In some cases, the property may need a full survey and a heating design plan to ensure the correct size and type of heat pump is installed. Without these, the system could underperform, leading to higher energy bills rather than savings.
For more details on installation costs and grants, you can visit our heat pump installation services page.
Air source heat pumps tend to lose efficiency when outdoor temperatures drop. In London and across the South East, where winter temperatures can often fall below freezing, this can mean the system must work harder to provide the same level of comfort. When the temperature drops below 0 degrees Celsius, the Coefficient of Performance can decrease, resulting in increased electricity usage.
Modern units are designed to operate effectively at temperatures as low as minus 20 degrees Celsius, but homeowners may still notice a slight increase in running costs during the coldest periods. Supplementary heating sources such as an electric heater or hybrid heating system are sometimes recommended.
Pro Tip: Check your insulation before installation. A well-insulated home is key to getting the best efficiency from your air source heat pump. Upgrading your loft, walls or windows before installation can make a noticeable difference to performance and running costs.
Air source heat pumps require a suitable outdoor area for the external unit. This needs to be clear of obstructions to allow proper airflow. In densely populated parts of London, space can be limited, and finding an appropriate location might be challenging. Wall mounting or placing the unit on a flat roof can be options but may require planning permission in some boroughs.
Older properties or homes with poor insulation may struggle to retain the lower grade heat provided by air source heat pumps. Without upgrades such as cavity wall insulation, loft insulation or double glazing, heat loss will reduce the efficiency of the system considerably.
We recommend reviewing our property suitability checklist before considering installation.
Another common concern is the noise produced by air source heat pumps. Although modern units are quieter than early models, they can still emit a low hum comparable to a fridge or light rain. While the noise is not usually disruptive indoors, in very quiet neighbourhoods it might be noticeable outside.
Proper placement of the unit, using acoustic enclosures or installing it away from bedrooms can reduce any potential disturbances. It is worth discussing noise levels with your installer during the planning stage to find the best solution.
Ready to make the switch to energy-efficient heating? See how RightAir Solutions can deliver seamless, expert installation tailored to your property.
Regular maintenance is important to keep an air source heat pump operating efficiently. Homeowners should check and clean air filters, fans and evaporators regularly to prevent blockages. An annual professional service is recommended to inspect refrigerant levels, electrical components and system pressures. Our heat pump maintenance packages make it easy to keep your system running at its best year after year.
Maintenance is not usually difficult but ignoring it can lead to performance issues and a shortened lifespan. Service plans are often available to help manage the upkeep of your system conveniently.
Air source heat pumps provide heat at lower temperatures than gas or oil boilers. Typically, they supply water to radiators at around 40 to 50 degrees Celsius, compared to 70 degrees or more from a conventional boiler.
This lower output means that larger surface area emitters, like bigger radiators or underfloor heating systems, are often needed to achieve the same comfort levels. Retrofitting these can add to the overall installation cost and project time.
Although air source heat pumps are highly efficient, they still rely on electricity to operate. With current electricity prices in the UK, running costs can sometimes be higher than expected, especially if the property is not very energy efficient.
Combining a heat pump with renewable electricity sources, such as solar panel integration options, can help reduce running costs significantly over the long term.
In most cases, air source heat pump installations are considered permitted development, meaning no planning permission is needed. However, if the home is located in a conservation area or is a listed building, planning permission may be required. Local regulations in London boroughs can vary, so it is always wise to check before starting any installation.
Our team at RightAir Solutions can assist you with navigating any regulatory requirements to ensure a smooth installation.
Although air source heat pumps are a greener heating choice compared to fossil fuel systems, manufacturing them does involve the use of rare metals and refrigerants. These materials can have a significant environmental impact if not handled responsibly.
Choosing a manufacturer that focuses on sustainable practices and proper recycling options can help reduce this footprint.
Air source heat pumps offer an attractive alternative to traditional heating systems but they are not the right choice for every home. Upfront costs, space requirements, lower heat output, and maintenance needs must all be carefully considered.
At RightAir Solutions, we are committed to helping homeowners in London find the right heating solution for their specific needs. Contact us for a personalised consultation and let us guide you through your options for a comfortable, energy efficient home.
The cost of installing an air source heat pump typically starts from around £14,000. Costs can vary depending on property size, heating requirements, and whether any radiator or insulation upgrades are needed. Grants such as the Boiler Upgrade Scheme can help reduce the upfront expense.
Yes, modern air source heat pumps can operate efficiently even at temperatures as low as minus 20 degrees Celsius. However, efficiency may drop slightly in extreme cold, and a supplementary heating system might be recommended for maximum comfort.
In most cases, air source heat pumps fall under permitted development rights and do not require planning permission. Exceptions apply to listed buildings and conservation areas, where you should check with your local council before proceeding.
An air source heat pump can reduce your energy bills if you are switching from a less efficient system such as electric heating, oil or LPG. Savings compared to mains gas may be modest due to higher electricity prices, but efficiency improvements and renewable energy integration can improve long-term savings.
Regular tasks include checking and cleaning filters, inspecting fans and outdoor units for debris, and arranging an annual professional service. Keeping up with maintenance ensures the system runs efficiently and prolongs its lifespan.
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