Greater London · Heat pump installation
Air Source Heat Pumps in Harrow
Air source heat pumps across Harrow and nearby, from a site survey or diagnosis to sign-off with the price fixed before work begins.
- Working out whether radiators need upsizing
- Checking whether planning permission is needed
- Moving away from fossil-fuel heating
How we handle air source heat pumps in Harrow
An air-to-water heat pump heats water to a lower temperature than a typical boiler, so radiators may need to be larger to give out the same heat. We check each radiator against the room’s heat loss, and the quote sets it out. The work covers hot water cylinders, radiator systems and homes heated by oil, LPG or gas, and people most often call us about wanting to stop using oil, LPG or gas for heating and not knowing whether a grant applies.
Terraced houses in a London area like Harrow can suit a heat pump well, provided the outdoor unit can sit somewhere that passes the MCS noise check.
Warranty on the equipment is the manufacturer’s own, on the manufacturer’s terms, and we set them out on your quote. Terms differ from brand to brand, so we go through them with you rather than leave you to find the small print.
- Location
- Harrow (HA2, HA1, UB5, HA3)
- Wider area
- Greater London
- Credentials
- NICEIC approved, F-Gas certified, MCS
- Quote
- A fixed price before any work starts
- Guide price
- Air-to-water £8,000–£16,000 before any grant (0% VAT for homes)
- Phone
- 07833 053749
- Reviewed
- 30 October 2026
Homes in Harrow and heat pumps
About 33% of homes in and around Harrow were built between the wars, according to Valuation Office Agency council tax records, and about 48% of households live in flats, according to Census 2021 figures. Whether the walls and loft have been insulated makes a real difference to the heat pump size for homes of that period. Flats are often harder for air-to-water systems, so we look at whether air-to-air suits better. For a London home, the outdoor unit position and the MCS noise check need careful planning.
Homeowners near Harrow-on-the-Hill station often ask whether a heat pump can take over from the boiler, and the heat loss survey answers that. If your home is one of the older properties near Church of St Peter, the survey checks whether it’s listed or in a conservation area before the outdoor unit position is chosen.
Harrow is about 7 miles south of Watford, in Greater London. Harrow gets the same approach as every job we take on: diagnosis first, a fixed price and proper paperwork when we’ve finished. 764 places in Greater London are on our list, from busy centres to quieter spots. London, roughly 12 miles off, has its own page on this site.
Our nearest recent job to Harrow was on Richmond Hill, Richmond (TW10), about 8 miles south: installing a Mitsubishi Electric Zubadan multi-split system serving four bedrooms, the study and the living room: six indoor units in total.
High Street, London Road and Perceval Square and the roads off them are all inside our area. Main roads around Harrow include the B457 and B458, which makes travel easy. We also cover the places around Harrow: Roxeth (1 mile south), South Harrow (1 mile south), North Harrow (1 mile north-west), Harrow on the Hill (1 mile south-east) and Rayners Lane (1 mile west). Within a short drive, we also cover London (12 miles south-east), City of Westminster (9 miles south-east), Marylebone (10 miles south-east) and Kensington (8 miles south-east).
Near you in Harrow
Typical jobs here are in properties near Kingsfield Arms, Grange Primary School and Northwick Park. For rail, the closest station is Harrow-on-the-Hill station, about 0.7 miles north-east of the centre. A little further out are St. George's Shopping Centre (0.7 miles north-east) and Clementine Churchill Hospital (1 mile south-east). The countryside around Harrow includes Islip Manor Meadows and Northala Fields.
Harrow: your questions answered
Do I need permission to put air conditioning in my flat in Harrow?
In many cases, yes, once the lease and the building’s rules are checked. We look at where the outdoor unit could go, such as a balcony, flat roof or rear wall, and write it up for the freeholder or agent.
Can I get the Boiler Upgrade Scheme grant in Harrow?
Yes, the scheme covers homes in England, including Harrow, if they qualify. 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. As an MCS certified installer, we apply for it on your behalf.
How do you keep the place clean during the work?
Protection goes down first: sheets over the floor and nearby furniture. Holes and fixings are agreed with you, and we clean up afterwards when we finish.
Do you work on commercial properties?
Yes. Homeowners, landlords, agents and businesses all book us in Harrow and across Greater London. Let us know who the records should go to.
Do you work on systems someone else installed?
Yes. Systems fitted by other companies are fine, on all the main brands. Send us the make and model, and any records you have.
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 it also matters for the manufacturer’s warranty. We can quote for the whole job, from supply to commissioning.
Do you have a 24/7 line?
Yes. There’s a 24/7 emergency line for problems that cannot wait for a planned visit. Call 07833 053749 and tell us what’s happened.
How the job changes from property to property
VAT on heat pumps
Please treat this as general guidance rather than tax advice.
Heat loss surveys
Without a proper survey, a heat pump can be too big or too small, and both cause problems.
Rented and managed buildings
We also work for facilities teams in offices, schools and public buildings across Greater London. Work can be phased by floor, zone or building to keep disruption down.
We work for landlords, letting agents and managing agents as well as homeowners and businesses. Let us know who will give us access and who the records should go to and we’ll copy in whoever needs it.
How we price air source heat pumps
Jobs vary more than people expect. The main factors:
- Whether we need access equipment for high-level work
- Whether it’s a one-off job or part of a maintenance contract
- How many units are involved
Typical ranges are on our prices page, but each job is priced on what it involves. Call for a fixed-price quote, and we will explain what it covers.
What we need to know
Good photos often save a visit. Try to include:
- Where the outdoor unit is, or where you’d like it
- The postcode and whether it’s a home, flat or business
- The remote or wall controller showing any error
For a fixed-price quote, give us a ring on 07833 053749, or email if that’s easier with the address and a few details about the rooms or units involved. A few photos make it quicker. You will hear back from us the same working day.
Towns and villages near Harrow
More services for Harrow
What we do, step by step
The first job on site is protection: dust sheets over floors and furniture near the work and nothing is moved without asking you. Then the electrics are made safe and the work begins. The work on site takes from a couple of days to around a week, depending on the system and how much of the heating changes, and we clear up before we go. Some blocks in Harrow need contractor details in advance, so tell us what your building needs.
- It begins with your house and the heating it relies on now.
- 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.
- Cost, grant and VAT appear on one fixed-price quote.
- Then it’s fitted, commissioned and registered with MCS.
Before we arrive
- Let us know where we can park and unload
- Tell us about any building rules, permits or sign-in
- Tell us about access, such as roof hatches, high walls or locked plant areas
Getting a quote
Getting a quote is straightforward. Send a few details and pictures, and we reply the same working day. If we need to see the property first, we book a survey at a time that works for you.
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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