Hertfordshire · Heat pump installation
Heat pump installation in Welham Green, Hertfordshire
F-Gas certified and NICEIC approved, we cover Welham Green for air source heat pumps. Fixed-price quotes and a 24/7 emergency line.
- Choosing between air-to-water and air-to-air
- Questions about the Boiler Upgrade Scheme
- Finding a place for the outdoor unit
How we handle air source heat pumps in Welham Green
Every installation starts with a heat loss survey. It shows how much heat each room needs on a cold day so the system is sized to match. Sizing by rule of thumb is not good enough. Common call-outs are for a boiler that’s getting old and radiators that may be too small for a heat pump, across radiator systems, underfloor heating and air-to-water heat pumps.
Cottages and older homes near Welham Green can lose heat faster, so a proper heat loss calculation matters. Sometimes insulating first makes more sense.
Some warranty terms depend on the system being serviced regularly by a qualified engineer. If that applies to your system, booking the service on time keeps the record straight and each visit is recorded.
- Location
- Welham Green (AL9, AL10)
- Wider area
- Hertfordshire
- Enquiries
- On the working day you ask
- Accreditations
- F-Gas certified company, NICEIC approved, MCS
- Costs
- £8,000–£16,000 before the grant, 0% VAT on homes
- Price
- A fixed-price quote up front
- Telephone
- 07833 053749
- Page updated
- 30 October 2026
System by system
Outdoor unit position and planning
Where the outdoor unit goes depends on airflow, access and the route into the house. Noise is part of the MCS 020(a) check, so we consider nearby homes too.
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.
Nearby places to Welham Green
Also in Welham Green
Landlords, agents and facilities managers
Portfolio owners often want one contractor and one number. 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.
If you look after several properties, we can quote and plan the work across all of them. Each property gets its own records, so each one has its own history.
Why deal with it now?
Replacing a boiler in a hurry when it breaks leaves little time to consider a heat pump. Surveying and designing in advance means the system is sized right and any grant is applied for while the old heating still works. Getting the date in early helps for a job in a place like Welham Green.
Several rooms, units or sites on one quote often makes better use of the time. Mention every unit or room you need covered, and you will get one fixed price.
Why choose AirCon Doctor in Welham Green
- 24/7 emergency line for breakdowns
- Electrical work covered by our NICEIC approval
- MCS certified for heat pumps
- Enquiries answered the same working day
Read how installs are priced and our accreditations.
What a heat pump looks like in Welham Green
About 41% of homes in Welham Green and the neighbourhoods around it date from 1945 to 1972, according to VOA council tax data. Whether the walls and loft have been insulated makes a real difference to the heat pump size for homes of that period. The Hope and Anchor Public House, listed at grade II, is one of roughly 9 protected buildings and structures in the half-mile around Welham Green’s centre. Where a home is affected, the outdoor unit position is settled with the planning team at Welwyn Hatfield council, which normally handles Welham Green before the heat pump design is finished.
Live in one of the older houses around Church of St Mary the Virgin? Expect the survey to look closely at heat loss and at the building’s planning status. If your home is listed, like Hatfield House about 1.8 miles north, listed building consent comes before any heat pump work.
Welham Green is about 2 miles south of Hatfield, in Hertfordshire. Our engineers cover Welham Green for air source heat pumps, along with the rest of Hertfordshire. Count every place we list in Hertfordshire and you reach 381, with Welham Green on the list. The nearest of our city pages is London, around 17 miles from Welham Green.
If you need air source heat pumps at a property on Station Road, Old Farmhouse Mews and Vincenzo Close or anywhere close by, we can help. All of AL9 and AL10 is within our area, from the main roads to the quietest streets. We also cover North Mymms (1 mile south), Colney Heath (1 mile west), Hatfield (2 miles north), Sleapshyde (2 miles west) and Smallford (3 miles north-west). Larger places within reach include Watford (9 miles south-west), Hemel Hempstead (10 miles west), Stevenage (12 miles north) and St Albans (5 miles west).
Around Welham Green
Around Welham Green, our work takes us to homes and businesses near Brookmans Park, The Hope and Anchor Public House and Chancellor's School. Welham Green has its own railway station: Welham Green station. A little further out are Queen Elizabeth II Hospital (3.5 miles north) and The Bunker at Hatfield Police Station (2.3 miles north). Open spaces near Welham Green include Gobions Wood.
Common questions in Welham Green
Will you come out to Welham Green?
Yes. Welham Green is within the area we cover across London and the South East. We’re based in East Grinstead and plan each visit so the job can be finished in one trip where possible.
Can I get the Boiler Upgrade Scheme grant in Welham Green?
Welham Green 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. As an MCS certified installer, we apply for it on your behalf.
Why does F-Gas certification matter?
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 AirCon Doctor is certified.
Do you offer emergency call-outs?
Yes, any time. If something urgent happens, like water coming from a unit or a critical room overheating, call our 24/7 line and we will agree what happens next.
Can I do any of the installation myself?
Not the refrigerant work. The F-gas rules require certified companies and qualified engineers for it, and a new electrical circuit is notifiable building work unless a registered competent person does it.
Can landlords and managing agents book you?
Yes. Homeowners, landlords, agents and businesses all book us in Welham Green and across Hertfordshire. Let us know who the records should go to.
Will I need planning consent for an air source heat pump?
Under the Planning Portal rules, a heat pump on a house can often be permitted development. Listed buildings and their curtilages are excluded, and listed building consent is a separate matter, so we check for your property.
The process
There’s very little for you to do on the day. Someone needs to let us in and show us the units, or where they’re going, and the rest is down to us. Before we leave, the area is tidied and we explain what we’ve done. Send pictures of the space and the outside wall, and we can plan the work near Welham Green.
- You tell us about the home and what you want from a heat pump.
- We survey for heat loss and look at radiators, cylinder space and outdoor unit options.
- You get our view on the right type for the house, and on whether the Boiler Upgrade Scheme applies.
- The system is installed and connected to the controls.
- After commissioning, you get the MCS certificate and a handover.
How to prepare
- Let us know if the units are on a roof, a high wall or in a locked area
- Move furniture away from the wall where we’ll be working
- Arrange for someone to be there to let us in
Ask for a quote
VAT is set out clearly on every quote, and the rate that applies to your job is stated. VAT can differ between homes and businesses and between kinds of work, so we confirm it in writing rather than guess. For a fixed-price quote, ring us on 07833 053749.
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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