Hertfordshire · Heat pump installation
Heat pump installation in Bull's Green, Hertfordshire
Air source heat pumps in Bull's Green from an F-Gas certified company, with warranty terms explained brand by brand. We reply to enquiries the same working day.
- An oil, LPG or gas boiler near the end of its life
- Checking whether planning permission is needed
- Finding a place for the outdoor unit
What we’re called out for in Bull's Green
Many enquiries start with a question about the Boiler Upgrade Scheme. Whether you can get the grant depends on your home and the scheme conditions and we confirm it before you go ahead.
These are the situations we see most often:
- Not knowing whether a grant applies
- Moving away from fossil-fuel heating
- Working out whether radiators need upsizing
A heat loss calculation decides the size of heat pump your home needs.
Before booking anyone
- Which brand and model they’re proposing, and why
- How extra work would be agreed if they find something unexpected
- Whether anyone has checked the property or the system first
Air source heat pumps for homes and businesses in Bull's Green
We install air source heat pumps in Bull's Green and across Hertfordshire, and we’re MCS certified. There are two kinds: air-to-water, which heats radiators or underfloor heating and your hot water, and air-to-air, which warms rooms through indoor units and can also cool. We will explain which type fits your home and why. If the problem is a boiler that’s getting old and working out where a cylinder could go, we can sort it out.
Space for an outdoor unit is rarely an issue near Bull's Green, so the design focuses on heat loss and radiators.
Aftercare is simple, and most of it is in the manual: keep the outdoor unit clear, follow the manufacturer’s guidance on cleaning and book a service at the interval they recommend. That also helps where the warranty terms ask for regular servicing.
- Location
- Bull's Green (SG3)
- Region
- Hertfordshire
- Response
- Answered the same working day
- Credentials
- NICEIC and F-Gas, MCS
- Price
- A fixed price before we start
- Guide price
- £8,000–£16,000 (0% VAT on homes), before the grant
- Call
- 07833 053749
- Page updated
- 30 October 2026
The process
The visit has three parts, a bit like a doctor’s appointment: diagnose, treat and sign off. First comes a careful look at the system or the space, then the work itself, and finally we test, record and explain. Most of the time goes on the middle part, and that takes several days for an air-to-water system with a new cylinder, less for an air-to-air system. Pictures of the space and where the outdoor unit could go let us plan the work in Bull's Green.
- First we find out about the property, the heating you have now and what you are hoping for.
- A heat loss survey works out how much heat each room needs, and we look at the radiators, the cylinder space and where the outdoor unit could go.
- We send a fixed-price quote that shows the equipment, the grant position and the VAT.
- Installation covers the outdoor unit, the indoor connections and the controls.
- We commission the heat pump, complete the MCS paperwork and talk you through the controls.
Preparing for the visit
- Clear the space around the indoor unit, or where it will go
- Keep pets out of the rooms we’re working in
- Arrange for someone to be there to let us in
Get a fixed-price quote
Need a price for air source heat pumps? Please call 07833 053749 or write to us at info@aircondoctor.co.uk with a few details about the property. We’ll talk you through the options and give you a fixed-price quote before you commit to anything.
Related advice
What a heat pump looks like in Bull's Green
About 82% of households live in detached or semi-detached houses, according to the last census (2021). Finding room for the outdoor unit and a cylinder is seldom a problem in homes like these.
Historic houses such as Digswell House, about 2.6 miles south-west, are a reminder that listed homes need consent before a heat pump goes in.
Bull's Green is about 3 miles north-east of Welwyn Garden City, in Hertfordshire. Anywhere in SG3, our engineers can take on air source heat pumps. In Hertfordshire alone we list 381 places, and Bull's Green is one. For properties nearby, see our London page, about 24 miles away.
We cover homes and businesses on Bramfield Road, Burnham Green Road and Coltsfoot Lane and the roads around them. Here we cover the SG3 postcode area. Places around Bull's Green that are also on our list: Tewin Wood (1 mile south), Burnham Green (1 mile south-west), Datchworth (1 mile north), Harmer Green (1 mile south-west) and Woolmer Green (1 mile north-west). Within a short drive, we also cover Hemel Hempstead (14 miles south-west), Stevenage (5 miles north), St Albans (10 miles south-west) and Bishop's Stortford (14 miles east).
Local landmarks in Bull's Green
We fit and service air conditioning in homes and premises around The Horns Public House. For rail, the closest station is Welwyn North station, roughly 1.9 miles south-west of the centre. Other landmarks nearby include Hertford County Hospital (4.2 miles south-east) and Benington Castle (4.2 miles north-east). Open spaces near Bull's Green include Tewin Orchard and Hopkyns Wood.
Your questions about air source heat pumps in Bull's Green
Can I fit a heat pump in Bull's Green without planning permission?
The answer turns on the property and where the outdoor unit would sit. Historic England lists about 4 buildings and structures within half a mile of the centre of Bull's Green. 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 East Hertfordshire council, which is usually the planning authority for Bull's Green.
Will you come out to Bull's Green?
Yes, and the size of the place makes no difference to how we work. A few photos and the postcode are enough to get things started.
Can I do the refrigerant work myself?
The refrigerant side has to be done by a qualified engineer working for an F-Gas certified company. That is the law, not just our preference, and manufacturers expect it for their warranty too. We can quote for the whole job, from supply to commissioning.
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 written up and F-Gas records kept where they apply.
What does F-Gas certified mean?
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.
Am I eligible for a heat pump grant?
Possibly. In England and Wales it pays £7,500 for an eligible air-to-water or ground source heat pump, and £2,500 for air-to-air under tighter rules. Homes heated by oil or LPG with no mains gas can get an extra £1,500 towards an air source or ground source heat pump until March 2027. We check your home against the rules at the survey.
Do you survey before quoting?
Yes. We always look before we price, on a survey, or from your pictures and details where the job is simple. Then you get a fixed-price quote.
After we have gone
Systems last better with the right care. We suggest:
- Diary the next service
- Clear leaves and debris from the outdoor unit
- Store the MCS certificate and warranty documents together
Should you have questions after the install, give us a ring on 07833 053749, or email if that’s easier and we’ll look into it. A yearly service is a good habit.
Leave space around the outdoor unit. It needs good airflow to collect heat from outside, so keep it clear all year.
What the work involves, system by system
Air-to-water heat pumps
Flow temperatures are lower than with a typical boiler, which is why radiator sizing is part of the survey.
Heat loss surveys
A heat loss survey measures how much heat each room loses on a cold day. Everything else is sized from it.
Also near Bull's Green
Also in Bull's Green
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