Greater London · Heat pump installation
Heat pump installation in Merton, Greater London
Looking for air source heat pumps in Merton? We diagnose first, fix the price and book the work around you, finishing with proper records.
- Wanting to stop using oil, LPG or gas for heating
- Working out where a cylinder could go
- Checking emitters for a heat pump
Air source heat pumps for homes and businesses in Merton
As an MCS certified installer, we fit air source heat pumps for homes in Merton and the rest of Greater London. Air-to-water systems feed your radiators or underfloor heating and hot water cylinder, while air-to-air systems heat rooms directly through indoor units and can cool them too. We’ll explain which type fits your home and why. We’re often asked to deal with an oil, LPG or gas boiler near the end of its life and planning and permitted development questions, on hot water cylinders, air-to-water heat pumps and homes heated by oil, LPG or gas.
For flats in Merton, the lease, the freeholder and the rules for flats all come into it. The planning rules for flats are stricter than for houses, and we check before designing.
AirCon Doctor is an F-Gas certified company and NICEIC approved for electrical work, MCS certified for heat pumps and a Checkatrade member. Our engineers hold the F-gas qualifications needed to work on refrigerant.
- Place
- Merton (SW19)
- Region
- Greater London
- Response
- Same working day
- Prices
- Air-to-water £8,000–£16,000 before any grant (0% VAT for homes)
- Quotes
- Fixed after a survey or photos
- Accreditations
- NICEIC approved, F-Gas certified, MCS
- Call
- 07833 053749
- Page updated
- 30 October 2026
System by system
Radiators and underfloor heating
Heat pumps run at lower flow temperatures, so radiators may need to be larger so we check them against each room’s heat loss.
Hot water cylinders
Hot water from an air-to-water system is stored in a cylinder. Space for the cylinder is part of the survey particularly in homes with a combi boiler.
What happens on the day
The visit goes in the diary at a time that works for you, and we keep you posted if anything changes. When we arrive, we check the job against the survey or the photos you sent. If something is different, we talk it through with you before carrying on. From there, the work takes from a couple of days to around a week, depending on the system and how much of the heating changes. Some blocks in Merton need contractor details in advance, so tell us what your building needs.
- We find out about your home and the heating you have now.
- We measure heat loss for every room.
- We design the system, check the radiators and cylinder and look at the outdoor unit position.
- A fixed-price quote explains the cost, the grant position and the VAT.
- Then it’s fitted, commissioned and registered with MCS.
Preparing for the visit
- Keep pets out of the rooms we’re working in
- Tell us about parking and loading
- Make sure someone can let us in at the agreed time
How to get a quote
Every quote shows the VAT clearly, and the rate that applies to your job is stated. Homes, businesses and different kinds of work can be treated differently for VAT, so we confirm it in writing rather than guess. To get one, phone 07833 053749 or fill in the contact form.
Related advice
Heat pumps in Merton: local notes
About 42% of homes in the Merton area were built before 1919, according to VOA council tax data, and about 49% of households live in flats, according to the 2021 Census. In older homes, the heat loss calculation is especially important, as solid walls and draughts change the size of heat pump needed. Flats are often harder for air-to-water systems, so we look at whether air-to-air suits better. In London, outside space and the rules for flats often decide which kind of heat pump suits.
If your home is near Haydons Road station and heated by a gas boiler, an air-to-water heat pump can replace it where the survey shows it suits. Period properties close to St John The Divine can suit a heat pump, though insulation and any heritage protection are checked first.
Merton is about 1 mile south-east of Wimbledon, in Greater London. Whatever kind of property you have in Merton, our engineers can help with air source heat pumps. You will hear back from us the same working day, and there’s a 24/7 emergency line. Count every place we list in Greater London and you reach 764, with Merton on the list.
Not far from Merton, a recent job of ours was on Parkside, Wimbledon (SW19), about 1 mile north-west: installing a Mitsubishi Electric multi-split system serving four bedrooms and the main living room.
From High Path, Pincott Road and Hayward Close to the smaller roads in between, the whole area is covered. Every address in SW19 is within our area. We also cover the places around Merton: Merton Abbey (1 mile east), South Wimbledon (1 mile north-west), Colliers Wood (1 mile east), Tooting Bec (1 mile north-east) and Summerstown (1 mile north). Larger places within reach include London (7 miles north-east), City of Westminster (7 miles north), Marylebone (7 miles north) and Kensington (6 miles north).
Landmarks near Merton
Around Merton, our work takes us to homes and businesses near The Nelson Arms, Wimbledon School of Art and Wandle Park and the streets around them. The nearest railway station is Haydons Road station, roughly 0.8 miles north of the centre. Nearby you’ll also find Southside Wandsworth (2.8 miles north) and St George's Hospital (1.1 miles north-east). The countryside around Merton includes Henman Hill and Merton Park Green Walks.
FAQs for Merton
Can you fit air conditioning in a London flat in Merton?
In many cases, yes, once the lease and the building’s rules are checked. Permitted development rules for flats are tighter than for houses, so we check the outdoor unit position and give you the details to send to the freeholder or managing agent.
Is the heat pump grant available in Merton?
Merton is in England, where the Boiler Upgrade Scheme runs. For an air-to-water heat pump the amount is £7,500; an air-to-air system can get £2,500 if it replaces the fossil-fuel heating outright, meets the home’s full heating demand and is not an add-on to a boiler. As an MCS certified installer, we apply for it on your behalf.
Which type of heat pump is right for my home?
The right choice depends on the property and what you need. Air-to-water can attract a £7,500 grant where eligible; air-to-air only qualifies for £2,500 under strict conditions, and we set out the options after the survey.
Can you come out in an emergency?
Yes, 24/7. When you call, tell us the make, what’s happening and any error code, and we’ll advise on what to do next.
Will you make a mess?
We put dust sheets over floors and furniture near the work first, and the area is kept tidy throughout. Before we leave, we clear up and run through the work with you.
How much time does a heat pump install need?
An installation takes a few days on site, depending on the cylinder, the radiators and the pipework involved. We confirm the timing after the survey, and you can ring us on 07833 053749 or use the quote form to book it.
Do you work in Merton?
Yes. We work across Greater London, Surrey, Kent, East and West Sussex, Hampshire, the Isle of Wight, Berkshire, Buckinghamshire, Oxfordshire, Hertfordshire and Essex, Merton included.
Nearby places to Merton
What else we do in Merton
After we’ve gone
How well a system lasts depends on use and care. We suggest:
- Keep the MCS certificate with the manufacturer’s paperwork
- Keep the outdoor unit clear all year
- Look at insulation alongside the heat pump
In cold, damp weather the outdoor unit runs a defrost cycle from time to time. It may give off steam or sound different for a few minutes, and that is normal.
A well-insulated home helps a heat pump because it reduces the heat the system needs to supply.
What owners can safely do
Leave the units and pipework where they are. Moving a unit involves the refrigerant circuit, so it needs an F-Gas qualified engineer, and the electrics need care too. If you need something moved, we can quote for it.
Before you call us about a fault, a few checks can save a visit: is the system in the right mode, is the set temperature sensible, are the remote’s batteries working and has the breaker tripped. If the breaker trips a second time, leave it off and phone 07833 053749 or write to us at info@aircondoctor.co.uk.
What a customer said
“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