Hertfordshire · Heat pump installation
Welwyn air source heat pumps
Our engineers work in Welwyn on heat pump installation. A look at the job first, a fixed-price quote and written records at the end.
- Replacing a combi boiler with a heat pump
- Wanting to stop using oil, LPG or gas for heating
- Finding a place for the outdoor unit
How we handle air source heat pumps in Welwyn
An air-to-water heat pump heats water to a lower temperature than a typical boiler which means some radiators may need upsizing. The survey shows which rooms are fine and which need changes, and the quote sets it out. If the problem is checking eligibility for a heat pump grant and working out whether radiators need upsizing, we can help.
Homes around Welwyn usually have space for an outdoor unit and a hot water cylinder, so the main questions are heat loss, radiators and the electrics.
Nothing is signed off by word of mouth: commissioning details for an installation, a fault and repair note for a repair, or a record of the service. File it with the manual so it’s to hand next time.
- Place
- Welwyn (AL6)
- Wider area
- Hertfordshire
- Enquiries
- We reply the same working day
- Approvals
- F-Gas certified, NICEIC approved, MCS
- Guide price
- Air-to-water £8,000–£16,000 before any grant (0% VAT for homes)
- Price
- Fixed-price quote after a site survey
- Call
- 07833 053749
- Updated
- 30 October 2026
What air conditioning won’t do
To be straight with you, there are a few things this work will not fix:
- Getting planning permission or listed building consent on your behalf
- Any gas work on the existing boiler
- Formal advice on VAT for your situation
If in doubt, ring us on 07833 053749 or email us and we will say what we think before booking.
Parts of the system we cover
- Homes heated by oil, LPG or gas
- Hot water cylinders
- Air-to-air heat pumps
- Underfloor heating
- Air-to-water heat pumps
- Radiator systems
Landlords, agents and facilities managers
Managing agents often deal with us directly. Send the address, what’s needed and how access works and we’ll come back with a fixed-price quote.
Running several properties is easier with one contractor. Our area covers Greater London and the South East, so a run of properties can go into one programme and kept to a regular schedule.
What we do, step by step
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 a few days for most air-to-water installations, with air-to-air systems often quicker. Let us know how to reach the outside wall or outdoor unit at your property near Welwyn.
- Step one is understanding the house, how it’s heated today and what you’d like to change.
- The survey measures heat loss room by room and looks at radiators, hot water and the best spot for the outdoor unit.
- You get a fixed-price quote, with any grant you are eligible for and the VAT explained.
- Fitting day: the outdoor unit is placed, the indoor side connected and the controls set up.
- Once it’s running correctly, the MCS certificate is issued and we show you the settings.
Before we arrive
- Find the manual or the paperwork for the system, if you have it
- Move furniture away from the wall where we’ll be working
- Mention any managing agent or landlord rules we need to follow
Ask for a quote
Quotes do not take long. Call or email with a few details and we’ll come back to you the same working day. If we need to see the property first, we book a survey at a time that works for you.
Related advice
What the work involves, system by system
Heat loss surveys
The survey works out the heat needed room by room. Everything else is sized from it.
Air-to-water heat pumps
Flow temperatures are lower than with a typical boiler, which is why radiator sizing is part of the survey.
Your questions about air source heat pumps in Welwyn
Can I get the Boiler Upgrade Scheme grant in Welwyn?
Yes, the scheme covers homes in England, including Welwyn, 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.
Do I need planning permission for a heat pump in Welwyn?
It comes down to the building and the spot chosen for the outdoor unit. Central Welwyn sits inside the Welwyn Conservation Area. Heat pumps on houses are often permitted development, but listed buildings need consent and conservation areas restrict outdoor units facing a road. Where it’s needed, we check with the local planning authority (for Welwyn, usually Welwyn Hatfield council).
Can we book visits on a schedule?
Yes. Maintenance contracts are part of what we do, with visits at the interval your system and the manufacturer need. Each visit is recorded, with F-Gas records where refrigerant work is involved.
Is Welwyn in your area?
Yes. We cover Welwyn and across Hertfordshire, within the London and South East area we cover. For a fixed-price quote, give us a ring on 07833 053749 or write to us at info@aircondoctor.co.uk.
Why does F-Gas certification matter?
Anyone installing, repairing or servicing the refrigerant side must be qualified, and their company certified. It’s worth checking before booking, and we’re happy to show ours.
Do you work for landlords and businesses?
Yes. Homeowners, landlords, agents and businesses all book us across London and the South East. Let us know who the records should go to.
Do you provide F-Gas records?
Yes. You get a written record of each visit, and any work on the refrigerant circuit goes in the F-Gas records. Keep them with the manual and the warranty documents.
What a heat pump looks like in Welwyn
About 38% of homes in and around Welwyn have been built since 2000, according to Valuation Office Agency council tax records, and Census 2021 figures found about 61% of households in detached or semi-detached houses. Newer homes usually lose less heat, which tends to suit a heat pump well. Houses typically have space for an outdoor unit and a hot water cylinder.
Historic houses such as Digswell House, about 0.9 miles south-east, are a reminder that listed homes need consent before a heat pump goes in. Period properties close to Parish Church of St Mary can suit a heat pump, though insulation and any heritage protection are checked first.
Welwyn is about 2 miles north-west of Welwyn Garden City, in Hertfordshire. We cover Welwyn for air source heat pumps and across the rest of Hertfordshire. Across Hertfordshire, we cover 381 places, Welwyn among them. For properties nearby, see our London page (23 miles or so).
High Street, London Road and Mimram Place and the roads off them are all inside our area. Jobs in AL6 are looked at, quoted and booked the same way as anywhere else. Places around Welwyn that are also on our list: Monkswood (1 mile south-east), Ayot St Peter (1 mile south-west), Ayot Green (1 mile south-west), Pottersheath (2 miles north) and Codicote (2 miles north-west). Further out, we also cover Watford (14 miles south-west), Hemel Hempstead (12 miles south-west), Stevenage (6 miles north) and St Albans (7 miles south-west).
Landmarks near Welwyn
Locally, jobs take us to houses, flats and workplaces close to Stable Door pub, Danesbury Park and Homerswood Primary and Nursery School and the streets around them. The nearest railway station is Welwyn North station, about 1.1 miles south-east of the centre. Well-known places in the area include Queen Elizabeth II Hospital (3.5 miles south) and Datchworth Museum (2.7 miles north-east). Not far away are Mardley Heath.
Towns and villages near Welwyn
Also in Welwyn
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