In the South East, homeowners typically pay between £8,000 and £15,000 for a fully installed air to water heat pump, with air to air systems starting from around £4,000. The final figure depends on the size of your property, the type of pump you choose and how much groundwork is needed, but with government grants still available, many Kent households are paying considerably less than the headline price.
How Much Does It Cost to Install An Air Source Heat Pump?
An air source heat pump costs between £4,000 and £15,000 to install, depending on whether you go for an air to air or air to water system. Air to air heat pumps, which are simpler and heat rooms directly using a fan system, tend to sit at the lower end of that range, costing roughly £4,000 to £9,500 fully fitted.
Air to water heat pumps, which link into your radiators or underfloor heating and can also provide hot water, are more expensive, usually falling between £9,000 and £15,000 once installation is included.
For most family homes across Kent, an air to water system is the more common choice because it replaces a traditional boiler set up rather than requiring separate room units throughout the house.
Thinking about making the switch? Guscott Heating offers free, no obligation air source heat pump estimates tailored to your property across Kent. Get in touch today and find out exactly what your installation would cost.
What Factors Affect The Cost Of An Air Source Heat Pump
The cost of an air source heat pump is affected by several key factors that vary from property to property:
- Property size – larger homes need a bigger, more powerful pump to keep them warm, which pushes the price up
- Insulation quality – older Kent properties, particularly period cottages and converted farmhouses common across the county, often need extra insulation work before a heat pump can run efficiently
- Size of the unit needed – a pump sized correctly for your home’s heat demand affects both upfront cost and running efficiency
- Radiator upgrades – many older properties need new, larger radiators fitted to work well with the lower temperature heat a pump produces, adding to the overall spend
- Installation complexity – the length of pipework required and how straightforward the outdoor unit placement is will affect labour costs
- Brand of heat pump – different manufacturers and models sit at different price points
- Hot water cylinder – whether your existing cylinder can be reused or needs replacing will also shift the final quote up or down
Are There Grants Available To Reduce Heat Pump Costs?
There are grants available to reduce heat pump costs, with the Boiler Upgrade Scheme offering homeowners up to £7,500 towards an air source heat pump, or up to £9,000 if you’re replacing an oil or LPG boiler. This government backed scheme is designed to bring the cost of switching to a heat pump closer to that of a traditional boiler replacement, and it applies across England, including throughout Kent and the wider South East.
On top of the grant, heat pump installations also benefit from a 0% VAT rate when supplied and fitted together, which can save homeowners a further amount on the total bill. Landlords looking to improve the energy performance of rental properties in Kent can also use these incentives to offset upgrade costs while working towards higher EPC ratings.
Who Is Eligible For The Boiler Upgrade Scheme?
Eligibility for the Boiler Upgrade Scheme requires you to own the property you live in, have a valid Energy Performance Certificate with no outstanding recommendations for loft or cavity wall insulation, and be replacing a fossil fuel heating system such as an oil, gas or LPG boiler.
The scheme is available to homeowners and, in many cases, private landlords with residential properties, which makes it particularly relevant to landlords across Kent managing older housing stock with inefficient heating systems.
Guscott Heating can check your eligibility and handle the grant application as part of your installation, taking the paperwork off your hands.
How Much Does It Cost To Run An Air Source Heat Pump?
Running an air source heat pump typically costs less annually than running an old gas boiler once you factor in efficiency gains, with well insulated homes seeing energy bill savings of up to £290 a year after switching.
Air source heat pumps are around three to four times more efficient than a traditional gas boiler, meaning for every unit of electricity used, they produce two to four units of heat. Actual running costs will vary depending on your home’s insulation, the size of your property and current electricity tariff, but many households find that heat pump specific tariffs help bring day to day costs down further.
Does Home Insulation Affect Running Costs?
Home insulation has a significant effect on air source heat pump running costs because a poorly insulated house loses heat faster than a heat pump can efficiently replace it. Heat pumps produce a gentler, steadier heat than a gas boiler, so homes with draughty windows, thin walls or insufficient loft insulation will need the pump to work harder, using more electricity in the process.
Many older properties across Kent, particularly in villages and rural areas, benefit from an insulation check before installation to ensure the heat pump can run at its most cost effective setting.
What Is The Return On Investment For An Air Source Heat Pump?
The return on investment for an air source heat pump typically plays out over 7 to 12 years, once you weigh up the upfront cost against ongoing energy savings, grant funding and reduced maintenance compared with an ageing boiler. After the Boiler Upgrade Scheme grant of up to £7,500 is applied, many Kent homeowners find their net installation cost sits much closer to that of a standard gas boiler replacement, which shortens the payback period considerably.
Households switching from an oil boiler tend to see the fastest return, since oil is generally more expensive per unit of heat than the electricity used to run a heat pump, especially when combined with a heat pump specific electricity tariff.
Beyond the pounds and pence, the return on investment also includes fewer breakdowns and lower servicing costs, since heat pumps have fewer moving parts than a combustion boiler and don’t need annual gas safety checks. For landlords across Kent, there’s an added financial upside too, as a heat pump can boost a property’s EPC rating, which can support higher rental value and help meet upcoming minimum energy efficiency standards for the private rented sector.
Add in the fact that a well maintained heat pump can run reliably for 10 to 15 years or more, and the overall lifetime savings on energy bills often comfortably outweigh the initial outlay.
How Much Does It Cost To Replace A Gas Boiler With An Air Source Heat Pump?
Replacing a gas boiler with an air source heat pump typically costs between £9,000 and £15,000 before any grant funding is applied, since most gas boiler swaps involve fitting an air to water system that connects into your existing radiators and hot water setup. This price usually covers removing the old boiler, installing the outdoor and indoor heat pump units, and any radiator upgrades needed to suit the lower flow temperatures a heat pump produces.
Once the Boiler Upgrade Scheme grant of up to £7,500 is applied, many Kent homeowners find the net cost of switching from gas is much closer to a like for like boiler replacement than they first expected.
Because gas is generally a cheaper fuel per unit than electricity, some homeowners see a longer payback period switching from gas compared with those moving away from oil or LPG, though this gap continues to narrow as heat pump specific electricity tariffs become more widely available.
The exact cost will depend on your home’s insulation, radiator sizing and whether your current pipework and hot water cylinder can be reused rather than replaced.
How Long Does An Air Source Heat Pump Last?
An air source heat pump lasts around 10 to 15 years on average, though many well maintained systems continue running efficiently for longer. Regular servicing, ideally every two to three years, helps extend the lifespan of the unit and keeps it running at peak efficiency, protecting your investment over the long term.
Compared with a gas boiler, which usually lasts 10 to 15 years as well, a heat pump offers a similar working life but with lower ongoing carbon output and the added benefit of far fewer moving parts prone to breaking down.
Is An Air Source Heat Pump Worth The Cost For Kent Homes?
An air source heat pump is worth the cost for most Kent homes because it lowers carbon emissions significantly while offering long term energy bill savings and eligibility for government grants. Switching from a gas boiler to an air source heat pump can cut a household’s heating related carbon emissions by up to 1,650kg a year, roughly equivalent to the emissions from driving 6,800km in a petrol car.
For homeowners in coastal and rural parts of Kent where oil heating is still common, the savings and environmental benefits are often even more pronounced, since heat pumps are considerably cleaner and can be cheaper to run than oil boilers.
Get A Free Heat Pump Quote Today
Guscott Heating provides air source heat pump installation across Kent, including Canterbury, Maidstone, Ashford, Tonbridge, Sevenoaks and the surrounding areas. Get in touch today for a free quote tailored to your location.
Frequently Asked Questions
How long does it take to install an air source heat pump?
Most air source heat pump installations take between two and three days to complete, depending on whether new radiators or a hot water cylinder are also being fitted.
Do I need planning permission to install an air source heat pump in Kent?
Most homes don’t need planning permission for a standard air source heat pump installation under permitted development rules, though listed buildings or homes in conservation areas across parts of Kent may require additional checks.
How noisy is an air source heat pump outdoor unit?
Modern air source heat pumps typically run at around 40 to 60 decibels, similar to a quiet conversation or light rainfall, and most are designed to operate discreetly close to a property.
Can I install an air source heat pump in a flat or terraced house?
Air source heat pumps can be installed in flats and terraced houses, though space for the outdoor unit and any shared wall or leasehold restrictions should be checked before proceeding.
Will an air source heat pump work with my existing radiators?
Some existing radiators can work with an air source heat pump, though many homes need larger radiators fitted to compensate for the gentler, lower temperature heat these systems produce compared with a gas boiler.
