Kent · Heat pump installation
Air Source Heat Pumps in Knox Bridge
Need air source heat pumps in Knox Bridge? We diagnose first, fix the price and book the work around you, then sign it off with written records.
- Not knowing whether a grant applies
- Working out whether radiators need upsizing
- Plans to switch to electric heating with a heat pump
About our air source heat pumps in Knox Bridge
We begin with a room-by-room heat loss survey. That tells us how much heat the home needs, room by room, so the heat pump and the radiators or indoor units can be sized properly. Sizing by rule of thumb isn’t good enough. If you are dealing with moving away from fossil-fuel heating and choosing between air-to-water and air-to-air, we can help.
Older and listed homes in villages like Knox Bridge need extra care, because permitted development doesn’t apply within the grounds of a listed building, so we check consent first.
Warranty periods vary by brand and by product. For example, Daikin’s standard warranty on split air conditioning is 2 years, and its longer extensions apply to its air-to-water units only. Whatever the brand, the manufacturer’s terms are explained on your quote.
- Where
- Knox Bridge (TN17)
- Wider area
- Kent
- Approvals
- NICEIC and F-Gas, MCS
- Price
- Fixed, in writing
- Typical price
- Air-to-water £8,000–£16,000 before any grant (0% VAT for homes)
- Replies
- Answered the same working day
- Telephone
- 07833 053749
- Updated
- 30 October 2026
Air source heat pumps around Knox Bridge
VOA council tax data show about 31% of homes across Knox Bridge and its surrounding area were built in 2000 or later, and Census 2021 figures found about 74% of households in detached or semi-detached houses. Newer homes normally lose less heat, which tends to suit a heat pump well. Finding room for the outdoor unit and a cylinder is seldom a problem in homes like these.
The installer applies for the Boiler Upgrade Scheme grant, and we are MCS certified.
Knox Bridge is about 9 miles south of Maidstone, in Kent. Whatever kind of property you have in Knox Bridge, we can help with air source heat pumps. You’ll hear back from us the same working day, and there’s a 24/7 emergency line. Knox Bridge is one of 922 places in Kent where we work for homes and businesses. The nearest of our city pages is East Grinstead, around 25 miles from Knox Bridge.
Postcode districts we cover here: TN17. If you are just outside Knox Bridge, we cover Cranbrook Common (1 mile south), Frittenden (1 mile east), Sinkhurst Green (2 miles north-east), Sissinghurst (2 miles south) and Staplehurst (2 miles north). We also work in nearby towns such as Maidstone (9 miles north), Ashford (13 miles east), Royal Tunbridge Wells (12 miles west) and Tonbridge (13 miles west).
Near you in Knox Bridge
The closest station to Knox Bridge is Staplehurst station, roughly 2.4 miles north. Well-known places in the area include Benenden Hospital (4.4 miles south-east) and Sissinghurst Castle (1.9 miles south-east).
What affects the cost of air source heat pumps
Our prices page gives typical ranges, but every job is priced on its own. What we look at:
- How far the pipework has to run, and where
- Whether it’s a one-off job or part of a maintenance contract
- The electrical supply and whether a new circuit is needed
Every job is different, so each one gets its own fixed-price quote. The system, the access, the pipe routes and the parts involved all play a part.
What to send for a quote
When you call or email, these details help:
- The postcode and whether it’s a home, flat or business
- Photos showing the indoor unit and the space around it
- A short video of any fault, such as a noise or a flashing light
Need a price for air source heat pumps? Please ring us on 07833 053749 or write to us at info@aircondoctor.co.uk and tell us about the job. We’ll explain what we’d recommend and why, then send a fixed-price quote before you commit to anything.
What happens on the day
Anything involving refrigerant is handled by F-Gas qualified engineers, as the law requires, while the electrical side is covered by our NICEIC approval. On the day, both are in the same hands. On site, it takes a few days on site, depending on the cylinder, the radiators and the pipework involved. Visits to Knox Bridge are agreed with you in advance and planned so the job can be finished in one trip where possible.
- First we talk through the property and the current system.
- Every room’s heat loss is worked out on site.
- From those figures we size the heat pump and decide on radiators, cylinder and outdoor position.
- A fixed-price quote explains the cost, the grant position and the VAT.
- Installation, commissioning and MCS registration complete the job.
Getting ready for the visit
- Let us know where we can park and unload
- Mention any roof access, ladders or high-level work
- Have the make and model of any existing unit to hand
Ask for a quote
Our prices page gives typical ranges, but your quote is based on your job, because every property is different. After a look at the job, by photos or a survey, the price is fixed. To start, give us a ring on 07833 053749 or send an email.
Related advice
Keeping the system healthy
After the visit, a few habits help:
- Let the heat pump run steadily, as set up at handover
- Store the MCS certificate and warranty documents together
- Check what your manufacturer’s warranty asks of you
Should you have questions after the install, ring 07833 053749 or use the quote form and we’ll look into it. Annual servicing helps keep the system working well.
Book a service every year. Check the manufacturer’s terms, as they may include servicing conditions.
Questions from Knox Bridge
Is planning permission needed for a heat pump in Knox Bridge?
The answer turns on the property and where the outdoor unit would sit. The centre of Knox Bridge is in a conservation area. The permitted development rules for heat pumps leave out listed buildings and stop outdoor units going on road-facing walls or roofs in conservation areas. Anything outside the rules needs an application, and we raise it with Tunbridge Wells council, which is typically the planning authority for Knox Bridge first.
Is Knox Bridge within the area you cover?
Yes, and the size of the place makes no difference to how we work. Visits to smaller places are planned so the engineer arrives with what the job needs.
Can I do any of the installation myself?
Anything that involves the refrigerant needs an F-Gas qualified engineer from a certified company. That is a legal requirement, and manufacturers expect it for their warranty too. We are happy to quote for the full job, supply to commissioning.
How does the warranty work?
Warranty comes from the manufacturer and depends on the brand and product. Daikin, for instance, gives a standard 2 years on split air conditioning and we explain the terms for your brand on the quote.
When will I hear back?
You will hear from us the same working day. If it’s an emergency, ring the 24/7 line instead.
Does servicing affect my warranty?
For some brands, yes. Read the manufacturer’s terms, or send us the make and model and we’ll explain them and stick to the interval they set.
Is there a survey before the work?
Yes. Photos often do the job for simple work, while bigger systems and repairs that need testing get a visit.
Places near Knox Bridge
Other services in Knox Bridge
Common problems we fix in Knox Bridge
The Boiler Upgrade Scheme has made people ask whether their home could qualify. Whether you can get the grant depends on your home and the scheme conditions, so we check before you commit.
Look out for any of the following:
- Questions about where the outdoor unit can go
- Not knowing whether a grant applies
- Planning and permitted development questions
Sizing comes from the heat each room loses on a cold day, not from the size of the old boiler.
Questions to ask before booking
- Whose warranty applies, and on what terms
- Whether extra work needs your approval first
- Whether you get F-Gas records where refrigerant is involved
From one of our customers
“Office air con broke down in the July heatwave. Called at 8am, engineer was here by noon and fixed within 2 hours. Brilliant emergency response. They now hold the service contract for the whole building.”
James T., Crawley, office manager