Kent · Heat pump installation
Heat pump installation in Key's Green, Kent
Air source heat pumps across Key's Green and nearby, from a site survey or diagnosis to sign-off with the price fixed before work begins.
- Questions about listed buildings or conservation areas
- Questions about where the outdoor unit can go
- Questions about the Boiler Upgrade Scheme
Landlords, agents and facilities managers
We work for landlords, letting agents and managing agents as well as homeowners and businesses. Tell us who the contact on site is and who should receive the paperwork, and we will keep everyone informed.
Whether it’s one property or many, you get the same standard: a look at the job first, a fixed-price quote, work booked with the occupier and written records afterwards.
Air source heat pumps in Key's Green
Hot water from an air-to-water system is stored in a cylinder. Homes with a combi boiler may not have a cylinder, so finding space for one is part of the survey. With air-to-air, hot water has to come from something else. Common call-outs are for plans to switch to electric heating with a heat pump and checking emitters for a heat pump, across underfloor heating, air-to-air heat pumps and homes heated by oil, LPG or gas.
Older and listed homes in villages like Key's Green need extra care, because permitted development does not apply within the grounds of a listed building, so we check consent first.
Some manufacturers make regular servicing by a qualified engineer a condition of their warranty. Where yours does, a regular service with us keeps that side in order, and every service is written up.
- Location
- Key's Green (TN12)
- Wider area
- Kent
- Response
- We reply the same working day
- Credentials
- F-Gas certified company, NICEIC approved, MCS
- Price guide
- £8,000–£16,000 before the grant, 0% VAT on homes
- Quote
- Fixed, in writing
- Call
- 07833 053749
- Checked
- 30 October 2026
Key's Green: your questions answered
Will a heat pump in Key's Green need planning permission?
It comes down to the building and the spot chosen for the outdoor unit. The centre of Key's Green is in a conservation area. A heat pump on a house can be permitted development if it meets the conditions, including the MCS noise check, but not within the grounds of a listed building, and in a conservation area the outdoor unit can’t face a road. Where necessary, we check with the local planning authority (for Key's Green, normally Tunbridge Wells council).
Is the heat pump grant available in Key's Green?
Yes, if the home and the heat pump meet the scheme’s rules: Key's Green is in England, where it applies. It gives £7,500 towards an air-to-water or ground source heat pump, or £2,500 towards an air-to-air heat pump that replaces the fossil-fuel heating and meets the whole home’s heating need. The installer applies, and we are MCS certified.
How long will it take to install a heat pump?
An installation takes a few days for most air-to-water installations, with air-to-air systems often quicker. The survey lets us set a firm programme, and you can call 07833 053749 or drop us a line to book it.
Why use an F-Gas certified company?
Certification shows a business is approved to work on systems that hold F gas refrigerant. In Great Britain, that certification is a legal requirement, not an optional extra, and we hold it.
How do you keep the place clean during the work?
We start with protection: dust sheets over floors and anything close to the work. Holes and fixings are agreed with you, and we clean up afterwards before we leave.
Can I fit air conditioning or a heat pump myself?
No, not the refrigerant side. Under the F-gas rules, it must be done by qualified engineers from a certified company, and a new electrical circuit is notifiable building work unless a registered competent person does it.
How quickly will you reply?
The same working day. After that, we agree a survey, diagnosis or installation date that suits you, and you get a fixed price before any work goes ahead.
Before you call an engineer
Never try to top up, release or handle refrigerant yourself. Under the F-gas rules, engineers need their own qualifications and the company must be certified, and escaping refrigerant can cause cold burns. If you suspect a leak, switch the system off and call us.
On air conditioning, the filters in the indoor unit are normally the one part owners can clean where the manufacturer’s manual explains how. With the power off, they lift out, can be vacuumed or rinsed and must be fully dry before they go back. On a heat pump, the equivalent is keeping the outdoor unit clear and checking the controls.
What we do, step by step
You don’t need to do much on the day. Just let us in and point us to the units, or to where they’ll be fitted, and the rest is down to us. Before we leave, the area is tidied and we explain what we have done. Photos of the existing unit help with repairs and servicing in Key's Green.
- We talk through your home, your current heating and what you want from a heat pump.
- The survey measures heat loss room by room and looks at radiators, hot water and the best spot for the outdoor unit.
- We send a fixed-price quote that shows the equipment, the grant position and the VAT.
- Fitting day: the outdoor unit is placed, the indoor side connected and the controls set up.
- We commission the heat pump, complete the MCS paperwork and talk you through the controls.
Preparing for the visit
- Unlock any gate, garage or side passage we need
- Tell us about access, such as roof hatches, high walls or locked plant areas
- Dig out any previous service or F-Gas records
Get a fixed-price quote
VAT is set out clearly on every quote, and the rate that applies to your job is stated. VAT can differ between homes and businesses and between kinds of work, so we confirm it in writing rather than guess. For a fixed-price quote, give us a ring on 07833 053749, or email if that’s easier.
Read more
Homes in Key's Green and heat pumps
The 2021 Census found about 74% of households in detached or semi-detached houses. Detached and semi-detached houses usually have room for the outdoor unit and a cylinder.
With Scotney Castle about 3.6 miles south-east, it’s worth asking whether your own home is listed before planning a heat pump. Live in one of the older houses around Chapel Of Ease Of St Luke? Expect the survey to look closely at heat loss and at the building’s planning status.
Key's Green is about 4 miles east of Royal Tunbridge Wells, in Kent. Whatever kind of property you have in Key's Green, our engineers can help with air source heat pumps. We reply to enquiries the same working day, and there’s a 24/7 emergency line. 922 places in Kent are on our list. There’s also a page for East Grinstead, about 16 miles away.
Our nearest recent job to Key's Green was on Beacon Road, Crowborough (TN6), about 10 miles south-west: installing a Mitsubishi Electric multi-split system serving four bedrooms and a large home office.
Local streets include Cryals Road and Beech Lane, all of which are in our area. Our engineers cover all of the TN12 postcode area. We also cover the places around Key's Green: Lamberhurst Quarter (1 mile south), Petteridge (1 mile north-east), Pembury (2 miles north-west), Matfield (2 miles north-east) and Brenchley (2 miles north-east). Within a short drive, we also cover Maidstone (12 miles north-east), Sevenoaks (13 miles north-west), Royal Tunbridge Wells (4 miles west) and Tonbridge (6 miles north-west).
Near you in Key's Green
Around Key's Green, our work takes us to homes and businesses near Brenchley Wood and The Blue Boys Inn and the streets around them. For rail, the closest station is Frant station, roughly 3.5 miles south-west of the centre. Well-known places in the area include Pembury Hospital (2.4 miles north-west) and Old Scotney Castle (3.7 miles south-east). Green spaces nearby include Bewl Water and Tudeley Woods RSPB reserve.
How the job changes from property to property
VAT on heat pumps
Heat pumps in homes carry 0% VAT until 31 March 2027, and 5% after that following HMRC’s rules on energy-saving materials. Businesses pay the standard rate.
Outdoor unit position and planning
Permitted development conditions in England include an outdoor unit of no more than 1.5 m³ and must meet MCS 020(a) and not be used solely for cooling. Listed building curtilages are excluded.
Nearby places to Key's Green
Other services in Key's Green
A customer’s words
“Very professional from the initial survey through to installation. The engineer explained everything clearly and the quote was exactly what we paid. Would not hesitate to recommend AirCon Doctor.”
David W., Haywards Heath