West Sussex · Air conditioning installation
Highleigh air conditioning
Air conditioning for Highleigh and the surrounding area: diagnosis first, then a fixed-price quote, the work and written records. Call for a fixed-price quote.
- A portable unit with a hose out of the window
- A home office that warms up with screens and equipment
- An old system that needs replacing
Air con installers in Highleigh
A new system normally needs a dedicated circuit from the fuse board. Under Part P, a new circuit is notifiable unless a registered competent person does it, and our NICEIC approval means we install and certify it ourselves. Whether you call it air con, air conditioning or an air-to-air heat pump, in Highleigh it means the same thing to us: the right unit in the right place, fitted and commissioned properly.
Sizing is where cheap installs go wrong: the survey covers room size, glazing, insulation and how the room is used, so the unit isn’t too big or too small.
Space outside is rarely the problem in a place like Highleigh. More often it’s the walls, the electrics and the length of the pipe run that need thinking about.
Equipment warranty comes from the manufacturer, on its own terms, and we set them out on your quote. Terms differ from brand to brand, so we go through them with you rather than leave you to find the small print.
- Location
- Highleigh (PO20)
- Wider area
- West Sussex
- Price
- Fixed, in writing
- Credentials
- F-Gas certified, NICEIC approved
- Prices
- Single room from £1,200 + VAT
- Phone
- 07833 053749
- Last updated
- 30 October 2026
Questions from Highleigh
Do you cover smaller places like Highleigh?
We do. Villages and hamlets get the same service as the bigger towns. We are based in East Grinstead and plan each visit so the job can be finished in one trip where possible.
Can I fit air conditioning in Highleigh without planning permission?
The answer turns on the property and where the outdoor unit would sit. Historic England lists about 11 buildings and structures within half a mile of the centre of Highleigh. A system that heats as well as cools may not need an application on a house, provided it stays within the permitted development limits. Cooling-only units get no such allowance, and listed buildings and road-facing positions in conservation areas need more care. We speak to Chichester council, which is normally the planning authority for Highleigh when it matters.
Will you make a mess?
Protection goes down first: sheets over the floor and nearby furniture. Any drilling is agreed with you first, and we clear up the dust and offcuts when we finish.
Can the outdoor unit go on a roof or at ground level?
We agree it with you on the survey. It must have clear airflow and space for servicing, and walls or roofs facing a road can raise planning questions. We explain the options and any permissions to check.
Can you come out in an emergency?
Yes, day and night. When you call, tell us the make, what’s happening and any error code, and we’ll advise on what to do next.
Can air conditioning heat my home as well?
Most of the time, yes: modern splits are usually heat pumps, so they can heat a room in winter. The Energy Saving Trust notes that air-to-air heat pumps are sometimes referred to as air conditioning. Some cooling-only models exist, so we confirm it for the model on your quote.
What does F-Gas certified mean?
Companies working on equipment that contains F gas must be certified by an approved body, and the engineers need their own qualifications. It means the refrigerant in your system is handled legally.
Air conditioning in Highleigh: the local picture
Highleigh lies within about 2 miles of the sea. That’s worth knowing for an install, as salt air speeds up corrosion on outdoor coils and fixings, so we choose the position and fixings with that in mind. About 77% of households live in detached or semi-detached houses, according to Census 2021 figures. Detached and semi-detached houses typically have space for the outdoor unit, and several rooms can share one on a multi-split.
Living close to St Mary Our Lady Sidlesham? Some older properties in parts like that are protected, and the survey finds out whether yours is. A loft bedroom or a glazed extension is often the room that prompts the first call.
Highleigh is about 3 miles north of Selsey, in West Sussex. Whether you are in the middle of Highleigh or further out, we cover air conditioning, from small jobs to large ones. Highleigh is one of 371 towns, villages and districts in West Sussex where we work for homes and businesses. Worthing, roughly 18 miles off, has its own page on this site.
The closest recent job we can point to from Highleigh was on East Street, Chichester (PO19), about 4 miles north: installing a Daikin wall-mounted unit in the dining area and a second unit serving the kitchen pass area. See the job
Our engineers cover all of PO20 and the roads nearby. From Critchel's Lane, Highleigh Road and Green Lane to the smaller roads in between, nowhere is left out. Other places close to Highleigh include Almodington (1 mile west), Birdham (2 miles north-west), Somerley (2 miles west), Earnley (2 miles west) and Shipton Green (3 miles north-west). Further out, we also cover Bognor Regis (5 miles east), Chichester (4 miles north), Selsey (3 miles south) and Littlehampton (12 miles east).
Around Highleigh
The nearest railway station is Chichester station, about 3.9 miles north of the centre. Nearby you’ll also find Chichester Castle (4.5 miles north) and Selsey Lifeboat Museum (3.5 miles south). For a walk, there’s Pilsey Island.
What happens if it’s left?
Refrigerant rules have changed what new systems use. Since 2025, new single split systems with less than 3 kg of refrigerant can’t use F gases with a GWP above 750, which is why R32, with a GWP of 675, is now common. R410A, used in many older systems, has a GWP of 2088. An early booking makes the visit to Highleigh easier to arrange.
A single unit or a whole estate, we price it on the same basis: what needs doing, how we get to it and what it needs. You will have a fixed price before any work starts, with VAT shown clearly.
Why choose AirCon Doctor in Highleigh
- Covering London and the South East
- F-Gas company certification
- Diagnosis first, then a fixed price
- MCS certified heat pump installers
Take a look at how installs are priced and our accreditations.
The process
We book the visit for a day and time that suit you, and we keep you posted if anything changes. On arrival, the engineer compares the job with the survey, your photos or the details you gave us. Anything unexpected is raised with you before we go further. After that, it takes a day for most single-room installations, with multi-split, ducted and cassette systems taking longer. A few pictures help us make the most of a visit to Highleigh.
- We survey the property, or work from your photos for a simple job.
- The system is sized, positions are agreed and the price is fixed.
- Sheets go down first, then the indoor unit and the condenser are mounted.
- Pipework, cable and drain are run, the circuit is connected and the pipework is pressure tested and evacuated.
- We commission, show you the controls and leave the F-Gas and warranty paperwork.
How to prepare
- Mention any managing agent or landlord rules we need to follow
- Dig out any previous service or F-Gas records
- Name a contact who can meet us at the agreed time
Get a fixed-price quote
Our prices page gives typical ranges, but your quote is based on your job, because no two buildings, rooms or systems are the same. Once we’ve looked at the job, from photos or on a survey, you get a fixed price. To start, ring us on 07833 053749 or fill in the contact form.
Advice
For landlords and property managers
Bigger systems bring extra duties: a TM44 inspection by an accredited energy assessor is required at least every 5 years for systems over 12 kW. We arrange the inspection, get the system ready and put right anything it picks up.
Keeping records across a portfolio is half the battle. Each visit is written up, plus the F-Gas records where refrigerant is involved, ready for a tenant, a buyer or an inspection.
Nearby places to Highleigh
What else we do in Highleigh
When something else is needed
Air conditioning cannot fix everything, and we’ll tell you before any work starts. It does not solve:
- A building fabric problem such as single glazing or no loft insulation
- A lack of fresh air (most split systems recirculate room air rather than bringing fresh air in, which is a job for ventilation)
- Problems with a gas boiler or the radiators
Not sure which it is? You can ring us on 07833 053749 or fill in the contact form and we’ll tell you honestly.
Where we work
- Air-to-air heat pumps
- Wall-mounted split systems
- Ducted systems
- Multi-split systems
- VRF systems
- Ceiling cassettes
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