Hertfordshire · Heat pump installation
Air Source Heat Pumps in Smallford
Air source heat pumps for Smallford, from F-Gas certified engineers, with the manufacturer’s warranty terms explained on your quote. We reply to enquiries the same working day.
- Finding a place for the outdoor unit
- No space for a hot water cylinder
- Plans to switch to electric heating with a heat pump
Air source heat pumps in Smallford, done properly
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. If the problem is replacing a combi boiler with a heat pump and checking whether planning permission is needed, we can sort it out.
Homes around Smallford usually have room outside for a heat pump, so the design focuses on heat loss and radiators.
AirCon Doctor is an F-Gas certified company and NICEIC approved for electrical work, MCS certified for heat pumps and a Checkatrade member. Our engineers hold the F-gas qualifications needed to work on refrigerant.
- Where
- Smallford (AL4)
- Region
- Hertfordshire
- Prices
- £8,000–£16,000 before the grant, 0% VAT on homes
- Accreditations
- F-Gas certified company, NICEIC approved, MCS
- Pricing
- Fixed, in writing
- Call
- 07833 053749
- Checked
- 30 October 2026
Smallford: your questions answered
Is planning permission needed for a heat pump in Smallford?
It depends on the property. Around 6 listed entries sit within 0.5 miles of central Smallford. 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 St Albans City council, normally the authority for Smallford.
Is the heat pump grant available in Smallford?
Yes, the scheme covers homes in England, including Smallford, if they qualify. The grant is £7,500 for an air source (air-to-water) heat pump and £2,500 for an air-to-air system that replaces the existing fossil-fuel heating. The installer applies, and we are MCS certified.
Do you cover Smallford?
Yes. We work in Smallford and the rest of Hertfordshire, within the London and South East area we cover. To book, phone 07833 053749 or email us.
Do you look at the job first?
Yes. For simple jobs, pictures and a few details can be enough, while larger systems and faults that need testing are seen on site.
Which accreditations do you hold?
F-Gas company certification, NICEIC approval for electrical work and MCS certification for heat pumps, plus Checkatrade membership. Our engineers also hold the individual F-gas qualifications needed to work on refrigerant.
Can landlords and managing agents book you?
Yes. We work for homeowners, landlords, letting and managing agents, and businesses of every size in Smallford and across Hertfordshire. Tell us who should receive the paperwork.
Will I get records for the system?
Yes. It’s your proof of what was done: a dated note of the work, with refrigerant details where they apply.
Pricing air source heat pumps in Smallford
Before we fix a price, we need to know a few things. We check:
- What we find on the survey or diagnosis
- How many units are involved
- The type of system, from a single split to a larger system
Typical ranges are on our prices page, but your price depends on the job in front of us. Call for a fixed-price quote, and we will talk you through it.
Asking for a quote
Good pictures often save a visit. Try to include:
- A short video of any fault, such as a noise or a flashing light
- The paperwork from the last service, if you have it
- A close-up of the unit’s label showing the model number
Photos are enough for some jobs; others need a visit first. Multi-room systems, commercial buildings and anything with a long or hidden pipe route are normally surveyed first. Either way, you get a fixed price before any work is booked.
Heat pumps in Smallford: local notes
The last census (2021) found about 71% of households in detached or semi-detached houses. Finding room for the outdoor unit and a cylinder is seldom a problem in homes like these.
With Hatfield House about 2.7 miles east, it’s worth asking whether your own home is listed before planning a heat pump. Live in one of the older houses around Church of St Mark? Expect the survey to look closely at heat loss and at the building’s planning status.
Smallford is about 2 miles west of Hatfield, in Hertfordshire. Anywhere in AL4, our engineers can take on air source heat pumps. 381 places in Hertfordshire are on our list, large and small. For properties nearby, see our London page, about 19 miles away.
Our engineers work on Jove Gardens, Lawrence Close and Oaklands Lane and the roads around them. Here we cover the AL4 postcode area. Close to Smallford, our area also takes in Sleapshyde (1 mile south-east), Cooper's Green (1 mile north), Jersey Farm (1 mile north-west), Colney Heath (1 mile south-east) and Tyttenhanger (2 miles south-west). Within a short drive, we also cover Watford (8 miles south-west), Hemel Hempstead (8 miles west), Stevenage (11 miles north) and Welwyn Garden City (4 miles north-east).
Landmarks near Smallford
Around Smallford, our work takes us to homes and businesses near Three Horseshoes Public House, Highfield Park and Colney Heath Junior Mixed Infant and Nursery School, among other places. The nearest railway station is Hatfield station, roughly 2.4 miles east of the centre. Well-known places in the area include Hill End Hospital (1.4 miles south-west) and The Bunker at Hatfield Police Station (1.5 miles north-east). Open spaces near Smallford include Verulamium Lake and Colney Heath Local Nature Reserve.
Landlords, agents and facilities managers
We regularly work with managing agents. Tell us the property, the work and the access arrangements and we will come back with a fixed-price quote.
From a single flat to a whole estate, you get the same standard: a look at the job first, a fixed-price quote, work booked with the occupier and written records afterwards.
Before you call an engineer
Keep a note of anything odd: error codes, noises, drips, smells or a drop in performance. It makes our diagnosis quicker, and a photo of the display helps even more.
On air conditioning, the filters in the indoor unit are usually the one part owners can clean where the manufacturer’s manual explains how. With the power off, they lift out, can be vacuumed or rinsed and must be fully dry before they go back. On a heat pump, the equivalent is keeping the outdoor unit clear and checking the controls.
Places near Smallford
Also in Smallford
What happens on the day
Where something has to be switched off during the work, we agree it with you first, so you can plan around it. For businesses, we can normally work room by room or zone by zone. On site, it takes a few days for most air-to-water installations, with air-to-air systems often quicker. Photos of the room and the outside of the property help us plan a visit to Smallford.
- We find out about your home and the heating you have now.
- We measure heat loss for every room.
- From those figures we size the heat pump and decide on radiators, cylinder and outdoor position.
- Cost, grant and VAT appear on one fixed-price quote.
- Installation, commissioning and MCS registration complete the job.
Before we arrive
- Give us access to the outside wall, roof or yard where the outdoor unit sits
- Make sure someone can let us in at the agreed time
- Keep pets and children away from the work area
Get a fixed-price quote
Here’s what helps us quote: where the property is and what kind of building it is, pictures of the rooms or units, the make and model of any existing system and anything you’ve noticed, such as an error code or a noise. Then call 07833 053749 or drop us a line.
Related advice
From one of our customers
“Excellent service from start to finish. Two wall-mounted units installed in our home. Clean, tidy work: they protected all the floors and left no mess. The systems work brilliantly. Would highly recommend.”
Sarah M., East Grinstead