Hertfordshire · Heat pump installation
Knebworth air source heat pumps
Our engineers work in Knebworth on air source heat pumps. A look at the job first, a fixed-price quote and written records at the end.
- Finding a place for the outdoor unit
- A boiler that is getting old
- Planning and permitted development questions
Pricing air source heat pumps in Knebworth
We quote each job individually. This is what makes a difference:
- One-off work versus a regular service cycle
- The number of rooms, units or zones
- How easy the units are to reach
A single unit or a whole estate, we price it on the same basis: the work involved, the access and the equipment. The price is fixed before we start, with VAT shown clearly.
Asking for a quote
What to send for a quote:
- Where the outdoor unit is, or where you’d like it
- Your installation or service records
- Wide pictures of the room or the existing unit
Some jobs can be priced from pictures, while others need a survey. Multi-room systems, commercial buildings and anything with a long or hidden pipe route are normally surveyed first. Either way, the quote is fixed before anything goes ahead.
How we handle air source heat pumps in Knebworth
Every installation starts with a heat loss survey. That tells us how much heat the home needs, room by room, so the heat pump and the radiators or indoor units can be sized properly. Sizing by rule of thumb is not good enough. If you are dealing with deciding on the outdoor unit position and wanting to stop using oil, LPG or gas for heating, we can help.
For a house near Knebworth, space outside is rarely the problem, so the main questions are heat loss, radiators and the electrics.
Any work on the refrigerant circuit is recorded: what was done, the refrigerant type and any amount added or recovered. Keep the records with the manual and the warranty documents, as a manufacturer or a future engineer may ask to see them.
- Where
- Knebworth (SG3)
- Region
- Hertfordshire
- Pricing
- A fixed-price quote up front
- Approvals
- NICEIC approved, F-Gas certified, MCS
- Guide price
- £8,000–£16,000 before the grant, 0% VAT on homes
- Phone
- 07833 053749
- Updated
- 30 October 2026
FAQs for Knebworth
Will a heat pump in Knebworth need planning permission?
There’s no single answer: the building and the outdoor unit position decide it. The Stockens Green Knebworth Conservation Area is close to the centre of Knebworth. The permitted development rules for heat pumps leave out listed buildings and stop outdoor units going on road-facing walls or roofs in conservation areas. Anything outside the rules needs an application, and we raise it with North Hertfordshire council, which is usually the planning authority for Knebworth first.
Does the Boiler Upgrade Scheme cover homes in Knebworth?
Yes, if the home and the heat pump meet the scheme’s rules: Knebworth is in England, where it applies. It gives £7,500 towards an air-to-water or ground source heat pump, or £2,500 towards an air-to-air heat pump that replaces the fossil-fuel heating and meets the whole home’s heating need. As an MCS certified installer, we apply for it on your behalf.
What does F-Gas certified mean?
Companies working on equipment that contains F gas must be certified by an approved body, and each engineer needs the right qualifications too. It means the refrigerant in your system is handled legally.
How quickly will you reply?
The same working day. After that, we agree a survey, diagnosis or installation date that suits you, with a fixed price before work starts.
Do you protect the property while you work?
Protection goes down first: dust sheets over floors and anything close to the work. Any drilling is agreed with you first, and we clear up the dust and offcuts when we finish.
Are you F-Gas certified?
AirCon Doctor is an F-Gas certified company, with NICEIC approval for electrical work and MCS certification for heat pumps. We are also Checkatrade members.
Who has to arrange F-Gas leak checks?
Responsibility is shared between the operator, normally whoever owns or controls the equipment, and the service technicians. 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.
How it works
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 photos or the details you gave us. If something is different, we talk it through with you before carrying on. After that, it takes from a couple of days to around a week, depending on the system and how much of the heating changes. Send pictures of the space and the outside wall, and we can plan the work near Knebworth.
- 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.
- 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.
How to prepare
- Tell us about any building rules, permits or sign-in
- Let us know if the units are on a roof, a high wall or in a locked area
- Make sure someone can let us in at the agreed time
Getting a price
VAT is set out clearly on every quote, with the rate that applies to your job. VAT can differ between homes and businesses and between kinds of work, so we confirm it in writing rather than guess. To get one, call us on 07833 053749, or email if that’s easier.
Advice
Why it’s worth doing now in Knebworth
If the emitters can’t give out enough heat, some rooms will not get warm enough. The survey picks this up before installation. An early booking makes the visit to Knebworth easier to arrange.
The cost depends on the type of system and how many units are involved, how easy the units are to reach and what the work involves. We give you a fixed price before any work starts, so you know where you stand.
Why people in Knebworth choose us
- Listed on Checkatrade
- One contact for properties across the South East and London
- Leading brands including Daikin, Mitsubishi Electric and Fujitsu
- We diagnose before we treat
Air source heat pumps around Knebworth
About 57% of homes in Knebworth and the neighbourhoods around it date from 1945 to 1972, according to Valuation Office Agency council tax records, and Census 2021 figures found about 45% of households in terraced houses. Homes of that age often have cavity walls that may or may not be insulated, which the survey checks. In a terrace, the outdoor unit position and the MCS noise check need particular care.
Period properties close to Church of St Martin can suit a heat pump, though insulation and any heritage protection are checked first. If your home is listed, like Knebworth House about 1.3 miles north-west, listed building consent comes before any heat pump work.
Knebworth is about 3 miles south of Stevenage, in Hertfordshire. From the centre of Knebworth to the outskirts, we cover air source heat pumps, from small jobs to large ones. Across Hertfordshire, we cover 381 places, Knebworth among them. For properties nearby, see our London page (26 miles or so).
London Road, Deanscroft and Lytton Fields and the roads off them are all inside our area. If your postcode is in SG3, the property is within reach. Nearby, we also cover air source heat pumps in Woolmer Green (1 mile south), Bragbury End (1 mile north-east), Oaklands (2 miles south), Datchworth (2 miles south-east) and Shephall (2 miles north). Within a short drive, we also cover Hemel Hempstead (14 miles south-west), Stevenage (3 miles north), St Albans (10 miles south-west) and Bishop's Stortford (15 miles east).
Local landmarks in Knebworth
Locally, jobs take us to houses, flats and workplaces close to Barnwell School and Knebworth Park and the streets around them. Knebworth has its own railway station: Knebworth station. Other landmarks nearby include Benington Castle (3.6 miles north-east) and Datchworth Museum (1.7 miles south-east). For a walk, there’s Mardley Heath.
What air conditioning will not do
We’d rather tell you now than sell you work that won’t help, so here are the limits:
- Planning approval where permitted development does not apply
- Promising eligibility for the Boiler Upgrade Scheme
- Tax advice on your own circumstances
Not sure which it is? You can call us on 07833 053749 or use the quote form and we’ll tell you honestly.
What the work covers
- Underfloor heating
- Hot water cylinders
- Air-to-air heat pumps
- Radiator systems
- Air-to-water heat pumps
- Homes heated by oil, LPG or gas
Towns and villages near Knebworth
More services for Knebworth
From one of our customers
“Office air con broke down in the July heatwave. Called at 8am, engineer was here by noon and fixed within 2 hours. Brilliant emergency response. They now hold the service contract for the whole building.”
James T., Crawley, office manager