Hertfordshire · Heat pump installation
Chiswell Green air source heat pumps
Air source heat pumps for Chiswell Green and the surrounding area: a survey or diagnosis, a fixed price, careful work and proper paperwork. Ask us for a fixed-price quote.
- Replacing a combi boiler with a heat pump
- Comparing heat pump types
- A boiler that is getting old
After we have gone
Simple habits make a real difference. We recommend:
- Don’t block radiators or indoor units with furniture
- Ask about the grant before you commit
- Keep the outdoor unit clear all year
We show you how to use the controls and explain how a heat pump works differently from a boiler. Heat pumps tend to work best running steadily rather than in short bursts so we set the controls up with you.
Let the heat pump run steadily rather than switching it on and off, using the settings agreed at handover.
Air source heat pumps for homes and businesses in Chiswell Green
Air source heat pumps collect heat from outdoor air and bring it inside, using electricity to drive the process. It works on the same principle as air conditioning, run the other way and the Energy Saving Trust notes that air-to-air heat pumps are sometimes referred to as air conditioning. If you’re dealing with moving away from fossil-fuel heating and deciding on the outdoor unit position, we can sort it out.
If your home near Chiswell Green has no mains gas, the grant can be bigger. Until March 2027, homes on oil or LPG without mains gas can get an extra £1,500 through the Boiler Upgrade Scheme, for an air source or ground source heat pump.
Warranty periods vary by brand and by product. Daikin, for instance, gives a standard 2 years on split air conditioning, with longer extensions only on its air-to-water heat pumps. Whatever the brand, the manufacturer’s terms are explained on your quote.
- Where
- Chiswell Green (AL2)
- Region
- Hertfordshire
- Pricing
- Fixed after a survey or pictures
- Price guide
- Air-to-water £8,000–£16,000 before any grant (0% VAT for homes)
- Replies
- We reply the same working day
- Accreditations
- F-Gas certified company, NICEIC approved, MCS
- Telephone
- 07833 053749
- Page updated
- 30 October 2026
Towns and villages near Chiswell Green
Other services in Chiswell Green
Air source heat pumps around Chiswell Green
Valuation Office Agency council tax records date about 40% of homes in and around Chiswell Green to the post-war years, 1945 to 1972, and about 62% of households live in detached or semi-detached houses, according to the 2021 Census. For homes of that age, the survey checks the insulation, the radiators and the hot water setup. Finding room for the outdoor unit and a cylinder is seldom a problem in homes like these.
Older homes near St. Stephen's Church may need extra checks for planning and heat loss before a heat pump is designed. Historic houses such as High Elms Manor, about 2.3 miles south-west, are a reminder that listed homes need consent before a heat pump goes in.
Chiswell Green is about 2 miles south-west of St Albans, in Hertfordshire. Properties in Chiswell Green get the same service as everywhere we cover: a look at the job first, a fixed-price quote and written records at the end. Our list for Hertfordshire has 381 entries and Chiswell Green is among them. We also work in London, around 19 miles away.
Being close to the B4630, Chiswell Green is easy for our engineers to reach. Streets in the area include Watford Road, Rosedene End and Hammers Gate, each of them within reach. Other places close to Chiswell Green include How Wood (1 mile south-east), Park Street (1 mile east), St Stephens (1 mile north-east), Frogmore (1 mile south-east) and Sopwell (1 mile north-east). Further out, we also cover Watford (5 miles south), Hemel Hempstead (5 miles west), Stevenage (15 miles north-east) and Welwyn Garden City (9 miles north-east).
Near you in Chiswell Green
Around Chiswell Green, our work takes us to homes and businesses near Three Hammers Public House, Verulamium Park and Marlborough Science Academy and the streets around them. For rail, the closest station is Park Street station, about 0.8 miles east. Nearby you will also find Hypocaust Museum (1.5 miles north) and Napsbury Hospital (2.1 miles east). Not far away are Verulamium Lake and Grebe House Wildlife Garden.
The process
We book the visit for a day and time that suit you, and we let you know if plans need to move. On arrival, the engineer compares the job with the survey, your pictures or the details you gave us. If something is different, we talk it through with you before carrying on. From there, the work takes a few days on site, depending on the cylinder, the radiators and the pipework involved. Because we plan from photos or a survey, a job in Chiswell Green can normally be finished in one visit.
- Step one is understanding the house, how it’s heated today and what you’d like to change.
- 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.
- A fixed-price quote follows, setting out the system, any grant that applies and the VAT.
- 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.
How to prepare
- Mention any roof access, ladders or high-level work
- Name a contact who can meet us at the agreed time
- Dig out any previous service or F-Gas records
Ask for a quote
The quickest way to a quote is to send pictures: the room or the existing unit, the outside wall or roof where the outdoor unit sits or would go, and the label on any existing unit. Tell us the address and what you need, and simple jobs can often be priced without a visit.
Read more
Let and managed properties
Managing agents often deal with us directly. Send the address, what’s needed and how access works and we will come back with a fixed-price quote.
Landlords, letting agents and managing agents book us, not only the people who live or work in the property. Let us know who will give us access and who the records should go to and we will copy in whoever needs it.
System by system
Radiators and underfloor heating
If radiators need upsizing, the quote lists them, so the work is clear.
Heat loss surveys
We look at walls, windows, floors, roofs and ventilation, and the size of each room.
Questions from Chiswell Green
Can I fit a heat pump in Chiswell Green without planning permission?
That depends on the building and where the outdoor unit goes. The half-mile around the middle of Chiswell Green holds about 5 listed buildings and structures. 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 St Albans City council, normally the authority for Chiswell Green.
Do you cover smaller places like Chiswell Green?
Yes, smaller places are covered as well as towns. We are based in East Grinstead and plan each visit so the job can be finished in one trip where possible.
Which manufacturers do you install and repair?
We install and work on the leading makes, from Mitsubishi Electric, Daikin and Fujitsu to Panasonic, Toshiba, LG, Samsung, Mitsubishi Heavy Industries and Hitachi. Send us the make and model if you have it.
What VAT do I pay on a heat pump?
Heat pumps in homes carry 0% VAT until 31 March 2027, with 5% from 1 April 2027. It doesn’t apply to businesses, and this is general information rather than tax advice.
Do you offer emergency call-outs?
Yes, day and night. When you call, tell us the make, what’s happening and any error code, and we’ll talk you through the next steps.
Do you survey before quoting?
Yes. For simple jobs, photos and a few details can be enough, while larger systems and faults that need testing are seen on site.
Am I eligible for a heat pump grant?
That depends on the scheme conditions, which we check for you. The installer applies for the grant, so we handle the application if you are eligible.
What a customer said
“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