Hertfordshire · Heat pump installation
Heat pump installers in South Mimms
One call covers heat pump installation in South Mimms: diagnosis, fixed price, work and sign-off. F-Gas certified, NICEIC approved and Checkatrade members.
- Checking whether planning permission is needed
- Wanting to stop using oil, LPG or gas for heating
- Comparing heat pump types
Air source heat pumps in South Mimms
In England, an air source heat pump on a house can often go in under permitted development rights. Conditions include a maximum outdoor unit size of 1.5 m³, compliance with MCS 020(a), use for more than cooling alone and a site outside the curtilage of a listed building. We check the rules for your property as part of the survey. The work covers radiator systems, hot water cylinders and air-to-air heat pumps, and common reasons people get in touch are an oil, LPG or gas boiler near the end of its life and checking emitters for a heat pump.
If your home in or near South Mimms is heated by oil, LPG or electric heaters with no mains gas, an extra £1,500 is available through the Boiler Upgrade Scheme until March 2027, on top of the £7,500.
Refrigerant work is written up in the F-Gas records: what was done, the refrigerant type and any amount added or recovered. File them with the system’s paperwork, ready for the next service or a warranty query.
- Location
- South Mimms (EN6)
- Wider area
- Hertfordshire
- Guide price
- £8,000–£16,000 before the grant, 0% VAT on homes
- Response
- We reply the same working day
- Quote
- Fixed-price quote after a site survey
- Credentials
- NICEIC approved, F-Gas certified, MCS
- Telephone
- 07833 053749
- Last updated
- 30 October 2026
What affects the quote in South Mimms
Jobs vary more than people expect. The main factors:
- The brand, model and parts involved
- What kind of system it is
- The electrical supply and whether a new circuit is needed
What you pay reflects the actual work. That’s why we look at the job first, from pictures or on a survey, and the price is agreed before we start.
Asking for a quote
A few details help us quote accurately. With your enquiry, please include:
- A short video of any fault, such as a noise or a flashing light
- Wide photos of the room or the existing unit
- A photo of the consumer unit with the cover closed
Quoting starts with a diagnosis, either on a site survey or, for simple jobs, from your pictures and details. After that, we send a fixed price before any work starts.
System by system
Radiators and underfloor heating
Heat pumps run at lower flow temperatures, so radiators may need to be larger so we check them against each room’s heat loss.
Air-to-water heat pumps
An air-to-water heat pump heats water for your radiators or underfloor heating and your hot water cylinder. It takes over from the boiler, and is MCS certified when we install it.
How the visit works
Our engineers arrive at the time agreed with you and check the plan with you first. Dust sheets go down over floors and anything close to the work, and the electrics are made safe before any panel comes off. On site, it takes a few days on site, depending on the cylinder, the radiators and the pipework involved. A few photos help us make the most of a visit to South Mimms.
- 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.
- A fixed-price quote follows, setting out the system, any grant that applies and the VAT.
- We fit the outdoor unit and connect it to the heating, hot water and controls.
- Once it’s running correctly, the MCS certificate is issued and we show you the settings.
How to prepare
- Have the make and model of any existing unit to hand
- Let us know where the consumer unit is
- Mention any roof access, ladders or high-level work
Get a fixed-price quote
For a fixed-price quote, ring 07833 053749 or send an email and tell us about the property and what you need. Photos help a lot. You will hear back from us the same working day.
Read more
South Mimms questions
Can I get the Boiler Upgrade Scheme grant in South Mimms?
Yes, the scheme covers homes in England, including South Mimms, if they qualify. The amount depends on the type of heat pump, and the survey confirms which applies. The installer applies, and we are MCS certified.
Is planning permission needed for a heat pump in South Mimms?
It depends on the property. The South Mimms Conservation Area takes in the middle of South Mimms. 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 planning department at Hertsmere council, normally the authority for South Mimms.
Do you cover South Mimms?
Yes. We cover South Mimms and across Hertfordshire, within the London and South East area we cover. For a fixed-price quote, call 07833 053749 or drop us a line.
How soon will you get back to me?
You will hear from us the same working day. For a breakdown that cannot wait, call our 24/7 emergency line.
Which manufacturers do you install and repair?
Mitsubishi Electric, Daikin, Fujitsu, Panasonic, Toshiba, LG, Samsung, Mitsubishi Heavy Industries, Hitachi and others. For new systems, we recommend a brand and model to suit the job and explain why.
What does F-Gas certified mean?
For refrigerant work, both the engineer and the company need the right F-gas credentials. Ask to see proof before you book anyone and we’ll gladly show you ours.
How much time does a heat pump install need?
Expect it to take a few days for most air-to-water installations, with air-to-air systems often quicker. How much of the heating changes decides most of the time, and we confirm the timing with your quote.
Towns and villages near South Mimms
More services for South Mimms
Air source heat pumps around South Mimms
VOA council tax data show about 57% of homes in and around South Mimms date from 1919 to 1939, and the last census (2021) found about 80% of households in detached or semi-detached houses. Whether the walls and loft have been insulated makes a real difference to the heat pump size for homes of that period. Houses normally have space for an outdoor unit and a hot water cylinder.
Historic houses such as Wyllyotts Manor, about 1.6 miles east, are a reminder that listed homes need consent before a heat pump goes in. Older homes near Church of St Giles may need extra checks for planning and heat loss before a heat pump is designed.
South Mimms is about 2 miles west of Potters Bar, in Hertfordshire. From the centre of South Mimms to the outskirts, we cover air source heat pumps, from a single room to a whole building. Across Hertfordshire, we cover 381 places, South Mimms among them. For properties nearby, see our London page, about 15 miles away.
If your postcode is in EN6, we can take the job on. From St Giles' Avenue, Blanche Lane and Greyhound Lane to the smaller roads in between, the whole area is covered. Close to South Mimms, our area also takes in Ridge (1 mile south-west), Dancers Hill (1 mile south-east), Kitts End (2 miles south-east), Well End (2 miles south-west) and Green Street (2 miles south-west). We also work in nearby towns such as Watford (8 miles west), Hemel Hempstead (11 miles west), Stevenage (15 miles north) and St Albans (6 miles north-west).
Landmarks near South Mimms
In South Mimms, that means homes and buildings near The White Hart Public House, North Mimms Park and Dame Alice Owen's School and the streets around them. The nearest railway station is Potters Bar station, roughly 1.6 miles east. A little further out are Spires Shopping Centre (2.9 miles south-east) and Shenley Hospital (2.7 miles west). Green spaces nearby include Darland's Lake and Furzefield Wood and Lower Halfpenny.
Honest limits
Air source heat pumps cannot fix everything, and we’d rather say so up front. It will not put right:
- Tax rulings, which only HMRC can give
- Planning approval where permitted development doesn’t apply
- Draught-proofing and insulation upgrades
If you are not sure, just ring us on 07833 053749 or send an email and we will give you a straight answer before booking.
What the work covers
- Air-to-water heat pumps
- Radiator systems
- Hot water cylinders
- Homes heated by oil, LPG or gas
- Air-to-air heat pumps
- Underfloor heating
A customer’s words
“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