Hertfordshire · Heat pump installation
Heat pump installers in St Nicholas
One call covers MCS certified installation of air source heat pumps for heating and hot water, with the Boiler Upgrade Scheme grant applied for in St Nicholas, from the first look to sign-off. F-Gas certified, NICEIC approved and Checkatrade members.
- No space for a hot water cylinder
- Not knowing whether a grant applies
- Questions about where the outdoor unit can go
Air source heat pumps for homes and businesses in St Nicholas
A heat pump takes heat from the outside air and moves it into your home, using electricity to drive the process. It works on the same principle as air conditioning, run the other way, and air-to-air heat pumps are sometimes simply called air conditioning. If you are dealing with working out where a cylinder could go and working out whether radiators need upsizing, we can sort it out.
Cottages and older homes near St Nicholas can lose heat faster, which a heat loss calculation will show. Sometimes insulating first makes more sense.
Looking after a system is mostly common sense: 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.
- Place
- St Nicholas (SG1, SG2)
- Region
- Hertfordshire
- Prices
- £8,000–£16,000 before the grant, 0% VAT on homes
- Accreditations
- F-Gas certified company, NICEIC approved, MCS
- Price
- Fixed after a survey or pictures
- Telephone
- 07833 053749
- Last updated
- 30 October 2026
Pricing air source heat pumps in St Nicholas
We quote each job individually. This is what makes a difference:
- What state the existing equipment is in
- Whether it’s a one-off job or part of a maintenance contract
- Access, including height, roofs and ladders
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 explain what it covers.
What to send for a quote
When you call or email, it’s useful to have:
- The rating plate or label on any existing unit
- The remote or wall controller showing any error
- The paperwork from the last service, if you have it
Here’s what helps us quote: where the property is and what kind of building it is, pictures of the rooms or units, the brand and model of anything already fitted and any symptoms, from error codes to drips. Once you have those, phone 07833 053749, or email if that’s easier.
The process
The work area is kept tidy throughout, with sheets down and mess cleared as we go. Any holes, fixings or cable routes are agreed with you before we drill. On site, it takes several days for an air-to-water system with a new cylinder, less for an air-to-air system. We load the van from the survey notes so the work in St Nicholas can be done in one go where possible.
- First we find out about the property, the heating you have now and what you’re 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.
- You get a fixed-price quote, with any grant you are eligible for and the VAT explained.
- Installation covers the outdoor unit, the indoor connections and the controls.
- Commissioning, MCS certification and a handover of the controls finish the job.
Getting ready for the visit
- Have the make and model of any existing unit to hand
- Clear the space around the indoor unit, or where it will go
- Name a contact who can meet us at the agreed time
Getting a price
Every quote starts with a look at the job, from a site survey or, where the job is straightforward, from pictures and measurements. After that, we send a fixed price before any work starts.
Related advice
What else we do in St Nicholas
Questions from St Nicholas
Is St Nicholas within the area you cover?
We do. Villages and hamlets get the same service as the bigger towns. Visits to smaller places are planned so the engineer arrives with what the job needs.
Do you cover St Nicholas for air source heat pumps?
Yes. St Nicholas is one of the places we cover. To start, give us a ring on 07833 053749 or use the quote form with a few photos.
Whose job is it to check the system for leaks?
The F-gas rules share it between the equipment’s operator and the engineers who work on it. The interval depends on the refrigerant charge, measured in tonnes of CO2 equivalent: at least yearly for 5 to under 50 tCO2e, and every 6 months for 50 to under 500 tCO2e.
Do you survey before quoting?
Yes, always. Diagnosis comes before treatment: the survey tells us what the job needs and how to do it, and the quote is based on that.
How much does an air source heat pump cost?
Expect £8,000–£16,000 for an air-to-water system, with 0% VAT on homes, before the grant is taken off. Where you land depends on the size of heat pump, any radiators that need changing and the hot water cylinder, and air-to-air systems are priced after a survey.
Which type of heat pump is right for my home?
Air-to-water replaces the boiler for heating and hot water, while air-to-air heats and cools rooms. The survey helps decide. Both are part of what we install.
Do I get paperwork after the visit?
Yes, always. A new system comes with commissioning details, F-Gas records and the manufacturer’s warranty information, and repairs and services get a record of the work.
Keeping the system healthy
Once we’ve finished, these simple steps help:
- Diary the next service
- Do not block radiators or indoor units with furniture
- Read the manufacturer’s warranty terms for your brand
The warranty on the heat pump is the manufacturer’s, on its own terms. We go through the conditions with you, including any servicing they ask for.
Heat pumps prefer steady, low-temperature running as explained at handover.
Homes in St Nicholas and heat pumps
About 30 miles out from central London, St Nicholas is part of the South East area we work across. The Valuation Office Agency’s council tax figures show about 32% of homes in and around St Nicholas were built in 2000 or later, and Census 2021 figures found about 46% of households in terraced houses. Newer homes normally lose less heat, which tends to suit a heat pump well. Shared walls keep a terrace’s heat loss down, while gardens next door make the noise check on the outdoor unit important.
Older homes near All Saints Church may need extra checks for planning and heat loss before a heat pump is designed. With Aston Bury about 3.3 miles south, it’s worth asking whether your own home is listed before planning a heat pump.
St Nicholas is about 1 mile north of Stevenage, in Hertfordshire. Homes and businesses alike in St Nicholas, our engineers can help with air source heat pumps. You’ll hear back from us the same working day, and there’s a 24/7 emergency line. St Nicholas is one of 381 towns, villages and districts in Hertfordshire where we work for homes and businesses. Our London page covers places nearby (30 miles or so).
Here we cover the SG1 and SG2 postcode area. From York Road, Ripon Road and Drury Lane to the smaller roads in between, the whole area is covered. We also cover the places around St Nicholas: Rooks Nest (1 mile west), Pin Green (1 mile south-west), Chells (1 mile south-east), Stevenage (1 mile south) and Bedwell (1 mile south-west). We also work in nearby towns such as St Albans (14 miles south-west), Bishop's Stortford (15 miles east), Welwyn Garden City (9 miles south) and Harpenden (10 miles south-west).
What’s near St Nicholas
Typical jobs here are in properties near Church of Saint Nicholas and The Nobel School, among other places. St Nicholas’s nearest station is Stevenage station, roughly 2 miles south-west of the centre. A little further out are Wymondley Castle (2.7 miles north-west) and Stevenage Museum (1.8 miles south-west). The countryside around St Nicholas includes Pryor's Wood.
System by system
Outdoor unit position and planning
Under permitted development, the outdoor unit must be 1.5 m³ or less and must meet MCS 020(a) and not be used solely for cooling. It can’t be within the curtilage of a listed building.
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.
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