Commercial air conditioning
London
Offices, shops, salons, restaurants, gyms and server rooms. Designed from a heat load calculation rather than a guess, installed out of hours so you do not close, and maintained on a contract with a fixed response time.
- Designed from a real heat load, not a rate per square metre
- Out of hours and weekend installation as standard
- F-Gas leak checking and record keeping handled for you
Accredited, and fitting the brands you know
Air conditioning we have fitted
Our own jobs, photographed on site. Real rooms, real outdoor positions, nothing from a catalogue.
Air conditioning
Outdoor unit on wall brackets
Above brick, isolator and cabling run tidy
Air conditioning
Condenser going up on straps
Lifted into a wall position, no scaffold
Air conditioning
Wall unit, commissioned
Set to 24 degrees and handed over
Air conditioning
Black wall unit in a sitting room
Chosen to sit with the room, not against it
Air conditioning
Ceiling cassette
Recessed flush into the ceiling
Air conditioning
Samsung Wind-Free
Cooling without a draught on the room
Air conditioning
Rooftop commissioning
Pressure tested and charged on gauges
Air conditioning
Outdoor unit at ground level
On paving beside the house, easy to service
Air conditioning
Black wall unit, running
Quiet enough for a bedroom
Air conditioning
One-way ceiling cassette
Only the grille shows
Air conditioning
Outdoor unit on paving
Against render, clear of the boundary
Air conditioning
Condenser high on a wall
On brackets where the ground was not an option
- FreeHeat load survey on jobs over £5,000
- Out of hoursInstalls planned around trading
- NICEICApproved electrical contractor
- Any makeService and repair
Commercial work in three steps
-
1
Survey and heat load
People, lighting, equipment and glazing, counted room by room.
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2
A drawing and a fixed price
Plant, installation, electrics and builders work quoted separately.
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3
Installed around you
A programme with the out-of-hours windows agreed before anyone starts.
What you get
- A heat load calculationThe number the design is sized from, in writing.
- A design drawingWhere every unit, pipe run and control goes.
- A price you can compareSplit into plant, installation, electrics and builders work.
- Out-of-hours installationEvenings and weekends where the premises need it.
- Certified electricsBy an NICEIC approved contractor.
- Maintenance afterService visits on a schedule, any make.
Your estimate
£2,400to£3,200
Supplied, fitted, commissioned and certificated. Includes VAT.
Send this on WhatsAppPrice it for your premises
Commercial work is priced on the number of indoor units and what kind they are, the same as anywhere else. The heat load calculation at the survey is what turns this into one number.
Last step: where do we send your written price?
Every figure on this site is an estimate built from the quotations we issued in 2026 and our own installation experience. It is not a quotation. The price you are given after the free survey is the price you pay.
The full guide: what each type of premises needs, and the compliance side
Commercial air conditioning in London starts at our home rates: 4,300 to 8,600 pounds for a small shop on two or three wall units. An office floor is priced from a heat load calculation, not from a table.
The number comes from a heat load calculation that counts people, lighting, computers, cooking equipment and glazing, because two units of the same floor area can need completely different plant.
What each type of premises actually needs
| Premises | Usual system | The thing that catches people out |
|---|---|---|
| Small office, up to 8 desks | 2 to 3 ceiling cassettes | Computers and people add more heat than the sun does |
| Open-plan office floor | VRF with zoned cassettes | One thermostat for the whole floor causes complaints |
| Shop or showroom | Wall units or slim ducted | Door open all day doubles the load in winter |
| Hair or beauty salon | Ceiling cassettes | Dryers put out 2kW each and the extract has to keep up |
| Restaurant or cafe | Cassettes plus dedicated kitchen extract | Cooling the dining room does nothing for the kitchen |
| Gym or studio | High capacity ducted | Air changes matter as much as temperature |
| Server or comms room | Dedicated close control unit | It must run in January as well as July |
| Warehouse or workshop | High-level ducted or destratification | Cooling the whole volume is rarely the right answer |
The compliance side, which most quotes ignore
Commercial air conditioning carries duties that a domestic system does not. Three of them are commonly missed, and all three sit with the business occupying the building rather than with whoever installed the plant.
F-Gas leak checking
Systems containing 5 tonnes of CO2 equivalent or more must be leak checked at least annually by a certified engineer, every six months above 50 tonnes, and every three months above 500 tonnes with permanent leak detection fitted. Records must be kept for five years. Most office VRF systems are comfortably over the first threshold.
TM44 inspections
Any building with air conditioning over 12kW effective rated output needs a TM44 inspection by an accredited assessor at least every five years, with the report lodged on the national register. Several smaller systems in one building count together towards the 12kW. We are not an accredited assessment body and do not issue these, but we will tell you if you need one.
Workplace temperature
There is no legal maximum workplace temperature in the UK, despite what most people believe. The duty is to keep the temperature reasonable and to provide clean, fresh air. What that means in practice for an office is usually a design condition of 21 to 24 degrees, and it is what an employer will be measured against if a complaint is made.
How commercial work is priced
We quote from a heat load calculation and a drawing, and the quote separates the plant, the installation, the electrical work, the builders work and the out-of-hours premium so you can see what you are paying for. That matters when you are comparing three quotes and one of them is 30 percent cheaper because it left the electrical work out.
- Survey and heat load calculation, free on jobs over 5,000 pounds.
- Design drawing showing unit positions, pipe routes and condensate runs.
- Fixed price broken into plant, install, electrics and builders work.
- Programme with the out-of-hours windows agreed before we start.
- Handover pack: commissioning records, F-Gas log started, O and M manual, electrical certificates, warranty registrations.
Maintenance contracts
| Contract | Visits | Includes |
|---|---|---|
| Basic | 1 per year | Full service, F-Gas check and log where required |
| Standard | 2 per year | As basic, plus priority response and no call-out fee |
| Critical | 4 per year | As standard, plus agreed response time and consumables |
Priced per unit rather than per site, so a two-unit salon is not paying an office rate. We will survey an existing installation and tell you what condition it is in before you commit to a contract.
Commercial questions
How much does commercial air conditioning cost in London?
A small shop or salon on two or three wall units is 4,300 to 8,600 pounds on our rates, and ceiling cassettes add 500 to 900 a unit. An office floor or a VRF system serving a building is priced from a heat load calculation and a drawing, because the number of zones decides it and a figure given before that would be a guess.
Commercial work is quoted from a drawing and a heat load calculation, not from a rate per square metre, because the occupancy and the equipment load change the answer more than the floor area does.
Is my business legally required to leak check its air conditioning?
If the system contains 5 tonnes of CO2 equivalent or more, yes. Leak checks must be carried out at least every twelve months by a certified engineer, more often on larger systems, and records must be kept for five years. Most office VRF and larger multi-split systems are above the threshold.
The duty falls on the operator of the equipment. In a leased building that is normally the tenant, not the landlord, and it is one of the most commonly missed compliance duties we see.
Do you work outside business hours?
Yes. Most retail and office installations are done evenings, weekends or over a shutdown, because the alternative is closing the business for a week. It is quoted as part of the job rather than added afterwards.
Do I need a TM44 air conditioning inspection?
If your building has air conditioning with an effective rated output over 12kW, an accredited energy assessor must inspect it at least every five years and lodge a TM44 report. That includes several systems in one building that add up to more than 12kW.
We are not an accredited assessment body, so we do not issue TM44 reports. We will tell you if you are likely to need one, because the penalty for not holding a current report is a fine per building.
Can you take over maintenance of a system another firm installed?
Yes, and we do it regularly. We start with a condition survey of what is there, so the first thing you get is an honest list of what is wrong before you sign a contract, rather than after.
Send us the floor plan
A drawing and the opening hours are enough for us to tell you the likely system and a realistic budget before anyone visits.
Monday to Friday 9am to 7pm, Saturday 10am to 3pm, Sunday closed
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