Greater London · Heat pump installation
Heat pump installation in Holywell, Greater London
Looking for air source heat pumps in Holywell? We look at the job first, give you a fixed-price quote and do the work at a time that suits you, then sign it off with written records.
- Plans to switch to electric heating with a heat pump
- Questions about the Boiler Upgrade Scheme
- Ageing boilers that will need replacing
Holywell: your questions answered
Does the Boiler Upgrade Scheme cover homes in Holywell?
Holywell is covered, as the scheme runs across England and Wales. 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. You don’t apply yourself: the MCS certified installer does, which is us.
Do you cover Holywell for air source heat pumps?
Yes. We work across London and the South East from our base in East Grinstead, and Holywell is part of that. Get in touch with the details and we reply the same working day.
Is there a survey before the work?
Yes. Photos often do the job for simple work, while larger systems and faults that need testing are seen on site.
How much does an air source heat pump cost?
Air-to-water systems are £8,000–£16,000 (0% VAT on homes), before any grant. The final price depends on the heat loss survey, the radiators and the cylinder, and you get a fixed-price quote.
What does F-Gas certified mean?
F-Gas certification shows a company is approved to work on equipment containing fluorinated gases, such as the refrigerant in air conditioning and heat pumps. In Great Britain, that certification is a legal requirement, not an optional extra, and we hold it.
Will you make a mess?
We put dust sheets over floors and furniture near the work first, and we tidy up as we go. Before we leave, we clear up and run through the work with you.
What warranty do I get?
Warranty is the manufacturer’s own, on its terms. Each brand sets its own conditions and periods, so we explain them on your quote.
About our air source heat pumps in Holywell
Heat pumps run at lower flow temperatures than most boilers which means some radiators may need upsizing. The survey shows which rooms are fine and which need changes and anything that needs changing is in the quote. Typical jobs include deciding which kind of heat pump suits the home and a boiler that’s getting old, across underfloor heating, air-to-water heat pumps and hot water cylinders.
A terrace in Holywell shares walls with its neighbours, which helps keep heat in, provided the outdoor unit can sit somewhere that passes the MCS noise check.
Warranty periods vary by brand and by product. Daikin, for example, gives a standard 2 years on split air conditioning, with longer extensions only on its air-to-water heat pumps. Whatever the brand, the manufacturer’s terms are explained on your quote.
- Place
- Holywell (WD18, WD3, WD99)
- Region
- Greater London
- Guide price
- £8,000–£16,000 before the grant, 0% VAT on homes
- Quote
- Fixed-price quote after a site survey
- Credentials
- NICEIC and F-Gas, MCS
- Replies
- We reply the same working day
- Phone
- 07833 053749
- Last updated
- 30 October 2026
Do you need air source heat pumps in Holywell?
Extensions, renovations and loft conversions are a natural time to rethink the heating. It’s simpler to plan radiators, pipework and a cylinder while the builders are in.
It’s time to call us if you’re dealing with:
- Questions about the Boiler Upgrade Scheme
- Choosing between air-to-water and air-to-air
- Planning and permitted development questions
With High Elms Manor about 4.1 miles north, it’s worth asking whether your own home is listed before planning a heat pump.
What your quote should include
- Whether testing, commissioning and paperwork are included
- Whether extra work needs your approval first
- Proof of F-Gas company certification
Also near Holywell
What else we do in Holywell
Air source heat pumps in Holywell: the local picture
About 40% of homes in Holywell and the neighbourhoods around it have been built since 2000, according to the Valuation Office Agency’s council tax figures, and about 52% of households live in flats, according to the 2021 Census. Better insulated, newer homes are often a good match for a heat pump. For flats, the first questions are where an outdoor unit could go, whether a cylinder fits and what the lease allows. In London, outside space and the rules for flats often decide which kind of heat pump suits.
If your home is one of the older properties near St Oswald's Parish Church, the survey checks whether it’s listed or in a conservation area before the outdoor unit position is chosen.
Holywell is about 2 miles south-west of Watford, in Greater London. Holywell gets the same approach as every job we take on: a look at the job first, a fixed-price quote and written records at the end. Our area takes in 764 places across Greater London, from busy centres to quieter spots. London, roughly 17 miles off, has its own page on this site.
The closest recent job we can point to from Holywell was on Richmond Hill, Richmond (TW10), about 14 miles south: installing a Mitsubishi Electric Zubadan multi-split system serving four bedrooms, the study and the living room: six indoor units in total.
Being close to the A4145, Holywell is simple for us to get to. That includes properties on Epsom Road, Combe Road and Ascot Road and nearby roads. If you are just outside Holywell, we cover Croxley Green (1 mile west), Colney Butts (1 mile east), Cassiobury (1 mile north-east), Moor Park (2 miles south) and Eastbury (2 miles south). Larger places within reach include City of Westminster (15 miles south-east), Marylebone (15 miles south-east), Kensington (14 miles south-east) and Hampstead (12 miles south-east).
Landmarks near Holywell
Locally, jobs take us to houses, flats and workplaces close to King George V Playing Fields, Croxley Danes School and The Red House, among other places. The closest station to Holywell is Watford High Street station, roughly 1.4 miles east of the centre. Other landmarks nearby include Hertfordshire Fire Brigade Museum (1.5 miles east) and Watford General Hospital (0.9 miles east). Not far away are Tumbling Bay and Chorleywood Common.
After we’ve gone
Looking after the system is mostly common sense. Our tips:
- Use the settings explained at handover
- Check what your manufacturer’s warranty asks of you
- Do not block radiators or indoor units with furniture
Should you have questions after the install, phone 07833 053749 or fill in the contact form and we will talk it through. Annual servicing helps keep the system working well.
Book a service every year. Check the manufacturer’s terms, as they may include servicing conditions.
How it works
Everything the job needs comes with us, from tools and test equipment to ladders and dust sheets. You only need to give us clear access to the units, or their planned positions, and to the fuse board. On site, the work takes anything from a couple of days for air-to-air to the best part of a week for air-to-water with radiator changes. In a London area like Holywell, parking and access are worth sorting out before the day.
- It begins with your house and the heating it relies on now.
- A heat loss survey is carried out, room by room.
- The design covers the heat pump, emitters, hot water and outdoor unit.
- You get a fixed price, with any grant and the VAT set out.
- Installation, commissioning and MCS registration complete the job.
Getting ready for the visit
- Name a contact who can meet us at the agreed time
- Tell us about parking and loading
- Dig out any previous service or F-Gas records
How to get a quote
Every quote starts with a look at the job, from a site survey or, where the job is straightforward, from photos and measurements. Then you get a fixed price so you know the cost before we begin.
Advice
What affects the quote in Holywell
Our prices page gives typical ranges, but every job is priced on its own. The quote depends on:
- How far the pipework has to run, and where
- The condition of any existing system
- The equipment or parts the job needs
One room or a whole building, we price it on the same basis: what needs doing, how we get to it and what it needs. The price is fixed before we start, and the quote sets out the VAT.
Asking for a quote
There’s no need for technical detail. Just send:
- Where the property is and what kind of building it is
- The remote or wall controller showing any error
- The rating plate or label on any existing unit
Getting a quote is straightforward. Call or email with a few details and we will come back to you the same working day. Where a survey is needed, we arrange a time that suits you.
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