West Sussex · Commercial air conditioning
Commercial air con in Lagness
Commercial air conditioning, in Lagness and nearby. Call for a fixed-price quote, and we’ll reply the same working day.
- Staff complaining about the temperature
- TM44 recommendations that need acting on
- R410A systems getting dearer to top up
Commercial air conditioning in Lagness, done properly
Air conditioning systems with an effective rated output over 12 kW must have a TM44 inspection at least every 5 years. The inspection is carried out by an accredited energy assessor. We do not carry out the inspection itself, but we prepare the system and do the work it recommends. We are often asked to deal with offices that get too hot in summer and changes of use that need a new layout, across server and comms room cooling, VRF systems and ducted systems.
In a village like Lagness, commercial air conditioning is normally for a pub, a shop, a surgery, a village hall or a rural business. Older buildings may be listed, so planning comes first.
AirCon Doctor is an F-Gas certified company and NICEIC approved for electrical work, with MCS certification for heat pumps and Checkatrade membership. Our engineers hold the F-gas qualifications needed to work on refrigerant.
- Location
- Lagness (PO20)
- Region
- West Sussex
- Enquiries
- We reply the same working day
- Price guide
- Priced after a site survey
- Quote
- A fixed price before work begins
- Approvals
- NICEIC approved, F-Gas certified
- Call
- 07833 053749
- Page updated
- 30 October 2026
Honest limits
We won’t sell you work that does not address the problem, so here are the limits:
- Issuing TM44 reports
- Major builder’s work such as new openings in structural walls
- Formal planning decisions, which rest with the council
If in doubt, ring 07833 053749, or email if that’s easier and we’ll say what we think.
What the work covers
- Multi-split systems
- Ceiling cassettes
- Wall-mounted split systems
- Server and comms room cooling
- Ducted systems
- VRF systems
Also near Lagness
More services for Lagness
What commercial work looks like in Lagness
The coast is only about 2 miles from Lagness. Rooftop and wall-mounted plant near the sea needs protecting from salt air, through position, coil coatings where available and regular maintenance. The FSA’s food hygiene register shows about 8 restaurants, cafés and canteens within 1.5 miles or so of the middle of Lagness. Each of those is a different cooling job, from kitchen heat to quiet bedrooms and server rooms.
For a surgery or clinic in the Bognor Regis War Memorial Hospital area, a planned maintenance contract keeps the system clean and its records up to date. For a school like Rose Green Junior School, air conditioning work is best done out of term.
Lagness is about 2 miles west of Bognor Regis, in West Sussex. We cover Lagness for commercial air conditioning, along with the rest of West Sussex. Count every place we list in West Sussex and you reach 371, with Lagness on the list. Worthing, roughly 14 miles off, has its own page on this site.
The closest recent job we can point to from Lagness was on East Street, Chichester (PO19), about 4 miles north-west: installing a Daikin wall-mounted unit in the dining area and a second unit serving the kitchen pass area.
All of PO20 is within our area, from busy streets to back roads. If you’re just outside Lagness, we cover Runcton (1 mile north-west), Merston (1 mile north), North Mundham (2 miles north-west), Colworth (2 miles north-east) and Hunston (2 miles west). Within a short drive, we also cover Worthing (14 miles east), Chichester (4 miles north-west), Selsey (5 miles south-west) and Littlehampton (9 miles east).
Near you in Lagness
Locally, jobs take us to houses, flats and workplaces close to The Regis School and Avisford, among other places. The nearest railway station is Bognor Regis station, roughly 2.5 miles east. Well-known places in the area include Tote Copse Castle (2.9 miles north-east) and Bognor Regis Museum (2.5 miles south-east).
What you can do yourself, and what needs us
Refrigerant is off limits for anyone without the right qualifications. Under the F-gas rules, engineers need their own qualifications and the company must be certified, and escaping refrigerant can cause cold burns. A suspected leak is our job, not yours.
Don’t move, re-route or disconnect units or pipework yourself. Moving a unit involves the refrigerant circuit, so it needs an F-Gas qualified engineer, and the electrical side needs a competent person. Ask us to quote for a move instead.
What affects the quote in Lagness
The price is fixed before any work begins. It’s based on:
- How many units are involved
- What kind of system it is
- Whether we need access equipment for high-level work
Whatever the property, the quote works the same way: what’s needed, how we reach it, the parts and the labour. Ask for a fixed-price quote and we will explain each part.
What to send for a quote
Good pictures often save a visit. Try to include:
- The outside wall, roof or yard where the outdoor unit sits or would go
- The postcode and whether it’s a home, flat or business
- The remote or wall controller showing any error
Photos are the fastest route to a quote: the inside and outside of the property where the work is, plus the rating plate of any unit already there. Tell us the address and what you need, and many jobs can be priced from that.
The process
Think of the visit in three stages: look, put right and sign off. First we check the system or the space against the plan, then the work itself, and finally everything is tested, recorded and explained. Most of the time goes on the middle part, and that takes anything from a day or two for a small office to several weeks of phased work on a large building. Somewhere like Lagness, it helps to know about lanes, gates and where to park.
- First comes a site survey of the building, its occupancy and the heat it has to deal with.
- A fixed-price quote follows, covering the system type, the layout and the timing.
- Installation is scheduled to fit the business, with out-of-hours and phased work where needed.
- Indoor and outdoor units, pipework, condensate and controls are installed and the electrics connected.
- We commission the system, record the refrigerant details and hand over the controls and documents.
Getting ready for the visit
- Find the manual or the paperwork for the system, if you have it
- Clear access to the fuse board
- Move furniture away from the wall where we’ll be working
Getting a price
To help us quote: the address and the type of property, a few pictures, the make and model of any existing system and any symptoms, from error codes to drips. Then give us a ring on 07833 053749 or email us.
Related advice
Your questions about commercial air conditioning in Lagness
Does sea air affect air conditioning in Lagness?
It can. Lagness is within about 2 miles of the coast, and salt air speeds up corrosion on outdoor units. The outdoor unit position, its fixings and regular servicing all help near the sea.
Do I need planning permission for air conditioning in Lagness?
It depends on the property. The half-mile around the middle of Lagness holds about 7 listed buildings and structures. Since 2025, an air-to-air heat pump on a house can count as permitted development if it meets the conditions and is not used only for cooling. Listed buildings still need consent, and in a conservation area a road-facing wall or roof isn’t allowed under those rules. If there’s any doubt, we ask the planning department at Arun council, normally the authority for Lagness.
When will I hear back?
On the same working day you contact us. After that, we agree a survey, diagnosis or installation date that suits you, with a fixed price before work starts.
Do you work on commercial properties?
Yes. We work for homeowners, landlords, letting and managing agents, and businesses of every size across London and the South East. Tell us who should receive the paperwork.
Is there a survey before the work?
Yes. For simple jobs, photos and a few details can be enough, while bigger systems and repairs that need testing get a visit.
Who has to arrange F-Gas leak checks?
The operator of the equipment, working with qualified engineers. Systems below 5 tCO2e fall outside the set leak check intervals, while larger ones need checks at least every 12 months, or every 6 months from 50 tCO2e. We’ll work out which band applies to yours.
What types of commercial air conditioning do you install?
Wall-mounted, cassette, ducted, multi-split and VRF or VRV systems. The right one depends on the building and how it’s used.
A customer’s words
“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