Hertfordshire · Heat pump installation
Trowley Bottom air source heat pumps
Air source heat pumps across Trowley Bottom and nearby, from a site survey or diagnosis to sign-off with the price fixed before work begins.
- Checking eligibility for a heat pump grant
- Radiators that may be too small for a heat pump
- Plans to switch to electric heating with a heat pump
Air source heat pumps in Trowley Bottom, done properly
Air-to-water heat pumps heat your hot water through a cylinder. If you have a combi boiler and no cylinder, the survey looks at where one could go. Air-to-air systems do not heat hot water, so you will need another way to do that. The work covers underfloor heating, homes heated by oil, LPG or gas and radiator systems, and the jobs we see most are ageing boilers that will need replacing and deciding which kind of heat pump suits the home.
For a home around Trowley Bottom that’s off mains gas and heated by oil or LPG, an extra £1,500 is available through the Boiler Upgrade Scheme until March 2027, on top of the £7,500.
Equipment warranty comes from the manufacturer, on its own terms, and we set them out on your quote. Each brand sets its own conditions, so we go through them with you rather than leave you to find the small print.
- Where
- Trowley Bottom (AL3)
- Region
- Hertfordshire
- Accreditations
- F-Gas certified company, NICEIC approved, MCS
- Price
- Fixed-price quote after a site survey
- Price guide
- Air-to-water £8,000–£16,000 before any grant (0% VAT for homes)
- Call
- 07833 053749
- Last updated
- 30 October 2026
Homes in Trowley Bottom and heat pumps
About 26 miles out from central London, Trowley Bottom is part of the South East area we work across.
Historic houses such as Childwickbury Manor, about 4.5 miles south-east, are a reminder that listed homes need consent before a heat pump goes in.
Trowley Bottom is about 4 miles west of Harpenden, in Hertfordshire. Trowley Bottom gets the same approach as every job we take on: diagnosis first, a fixed price and proper paperwork when we’ve finished. Our area takes in 381 places across Hertfordshire, from busy centres to quieter spots. For properties nearby, see our London page, about 26 miles away.
Postcode districts we cover here: AL3. That includes properties on Trowley Hill Road, Trowley Bottom and Wood End Lane and the roads around them. Close by, we work in Flamstead (1 mile north-east), Friar's Wash (1 mile north-east), Markyate (2 miles north-west), Roe End (2 miles north-west) and Jockey End (2 miles west). Within a short drive, we also cover Watford (11 miles south), Hemel Hempstead (4 miles south), Stevenage (13 miles north-east) and St Albans (6 miles south-east).
Around Trowley Bottom
We fit and service air conditioning in homes and premises around Rose And Crown Public House. The closest station to Trowley Bottom is Harpenden station, about 3.8 miles east of the centre. A little further out are Luton Castle (4.4 miles north) and Hemel Hempstead Hospital (4.5 miles south). For a walk, there’s Landpark Wood.
What we do, step by step
Protection comes first: sheets over the floor and any furniture nearby and nothing is moved without asking you. Then the electrics are made safe and the work begins. It 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. Photos of the room and the outside of the property help us plan a visit to Trowley Bottom.
- First we find out about the property, the heating you have now and what you’re hoping for.
- The survey measures heat loss room by room and looks at radiators, hot water and the best spot for the outdoor unit.
- The price comes back fixed and in writing, with the grant and VAT shown line by line.
- Fitting day: the outdoor unit is placed, the indoor side connected and the controls set up.
- Commissioning, MCS certification and a handover of the controls finish the job.
Getting ready for the visit
- Give us access to the outside wall, roof or yard where the outdoor unit sits
- Tell us about access, such as roof hatches, high walls or locked plant areas
- Find the manual or the paperwork for the system, if you have it
Getting a quote
Want a quote for air source heat pumps? Please ring us on 07833 053749 or send an email and tell us about the job. We’ll talk you through the options and give you a fixed-price quote before anything is booked.
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What we’re called out for in Trowley Bottom
Some people want to move away from burning fossil fuels at home. With a heat pump, the heat comes from the air outside and the system runs on electricity and that’s the appeal for many households.
Most people get in touch after spotting one of these:
- Comparing heat pump types
- Working out where a cylinder could go
- Checking whether planning permission is needed
Older homes near Church of St Leonard may need extra checks for planning and heat loss before a heat pump is designed.
Before booking anyone
- Whose warranty applies, and on what terms
- Whether the price is fixed or an estimate
- Which VAT rate the quote uses, and why
What affects the cost of air source heat pumps
Typical ranges are on our prices page, but every job is priced on its own. The quote depends on:
- The condition of any existing system
- The pipe route between the units
- The electrical supply and whether a new circuit is needed
What you pay depends on the type of system and how many units are involved, the access and what the work involves. You get a fixed price before any work starts, so there are no surprises.
What to send for a quote
To speed up the quote, send us:
- Any previous service or F-Gas records
- The address and the type of property
- The outside wall, roof or yard where the outdoor unit sits or would go
To get a fixed-price quote, phone us on 07833 053749 and tell us about the property and what you need. A few pictures make it quicker. We reply to enquiries the same working day.
Trowley Bottom questions
Is the heat pump grant available in Trowley Bottom?
Trowley Bottom is in England, where the Boiler Upgrade Scheme runs. Whether your home qualifies, and for how much, depends on the type of heat pump and the heating it replaces. The installer applies, and we are MCS certified.
Is a heat pump in Trowley Bottom permitted development?
That depends on the building and where the outdoor unit goes. Around 30 listed entries sit within 0.5 miles of central Trowley Bottom. On a house, an air source heat pump can often go ahead under permitted development, with an outdoor unit of no more than 1.5 cubic metres and an installation that meets MCS 020(a), which includes a noise check. Those rights don’t reach the grounds of a listed building, and conservation areas rule out walls or roofs facing a road. If that might affect you, we ask the planning department at Dacorum council, usually the authority for Trowley Bottom.
Do you work for landlords and businesses?
Yes. From a single let flat to offices, shops and public buildings, the approach is the same: a look first, a fixed-price quote and written records.
Can you come out in an emergency?
Yes, day and night. Call the emergency line and tell us the make, the symptoms and any error code, and we’ll talk you through the next steps.
How does the warranty work?
The manufacturer’s warranty, on the manufacturer’s terms. Terms differ by brand, and we set them out on your quote.
Who has to arrange F-Gas leak checks?
The F-gas rules share it between the equipment’s operator and the engineers who work on it. How often depends on the size of the refrigerant charge in tonnes of CO2 equivalent: at least every 12 months from 5 tCO2e, and every 6 months from 50 tCO2e.
Do I need new radiators for a heat pump?
We find out during the survey. Rooms where the radiator is big enough stay as they are and any changes are in the quote.
Towns and villages near Trowley Bottom
More services for Trowley Bottom
What air source heat pumps cannot fix
We’d rather tell you now than sell you work that will not help, so these are the things it won’t cover:
- Improving the building’s insulation
- Tax advice on your own circumstances
- Gas boiler work, such as disconnecting the old boiler, which needs a Gas Safe registered engineer
Not sure which it is? You can phone us on 07833 053749 or drop us a line and we’ll tell you honestly before you book.
What we work on in Trowley Bottom
- Radiator systems
- Underfloor heating
- Air-to-air heat pumps
- Homes heated by oil, LPG or gas
- Hot water cylinders
- Air-to-water heat pumps
From one of our customers
“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