Written by Mark Reid,
Trades Editor ·Verified 23 September 2026
Slough's mix of housing stock throws up different challenges when it comes to air conditioning. You've got Victorian terraces around the town centre with solid walls and limited loft space, newer developments near Langley and Britwell with better insulation but smaller gardens for condenser units, and plenty of commercial units along the Trading Estate that need something more heavy-duty than a domestic split system. The proximity to the M4 and Heathrow also means a fair few offices and warehouses in the area, so local installers tend to see a real spread of jobs, from a single bedroom unit in a semi off Farnham Road to multi-zone systems in a business park unit near Slough Trading Estate. That variety matters when you're choosing who to call, because not every installer is set up for both.
The businesses featured here are drawn from public business listings, and we rank them using public review rating and review count as the main factors, with a small lift given to those that have a working website and phone number listed. We also read through each business's homepage to check that air conditioning work, whether that's installation, servicing or repairs, is genuinely what they primarily do. That step matters because it keeps general electricians or heating engineers who only dabble in air con off a page meant specifically for air conditioning specialists. Any listing flagged as permanently closed gets removed automatically, so you're not wasting time ringing a number that's gone dead.
Where you spot a Trust Verified badge next to a business, that firm has gone through our fuller verification process, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information. Our How We Verify page sets out exactly what that involves if you want the full picture. For any business without that badge, none of those checks have been carried out by us, and it's on you to do your own homework before booking. Ask to see F-Gas certification for anyone handling refrigerant, check they're comfortable with the make and model you're after, and get at least two or three quotes before committing, since prices for a single-room split system in Slough can range anywhere from around £800 to £1,800 depending on unit quality and how much pipework and drilling is involved. A written quote that breaks down labour, materials and any scaffolding or access costs will save arguments later.
How We Select & Rate The Best Air Conditioning Pros in Slough
Rankings are based on public review rating and review count pulled from third-party business listings, with a small lift given to businesses that show a working website and phone number. We check each business's homepage to confirm air conditioning work is what they primarily offer, which keeps unrelated trades off this page. Listings flagged as permanently closed are removed automatically. Businesses marked Trust Verified have gone further, passing our full verification covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information (see our How We Verify page for details). Other businesses listed haven't been independently verified by us, and being included isn't an endorsement. Always do your own checks before hiring.
Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. Every other listing is ranked on rating and review count from third-party business listings. How we rank & verify →
Commercial units and office spaces around Slough make up much of the workload for MTP Cooling Ltd, with installation and servicing of air conditioning systems handled for businesses needing consistent climate control. Domestic jobs are also taken on, from split units in flats to larger household systems. Reviewers rate the firm 4.7 from 15 Google ratings.
Split system installation for homes and offices makes up much of the workload at Eton Air Conditioning Ltd, based in Slough. The firm also handles servicing and repairs on existing units, a detail reflected in a 5 star rating from nine reviews. Work is generally carried out across Slough and the surrounding area.
A rating of 4 from 21 reviews places CoolRef LTD among the steadier air conditioning firms operating in Slough. The company installs and services cooling systems for homes and businesses in the area, working across both domestic and commercial premises. Enquiries are handled directly through its website.
Rated 5 stars by its customers, London Cooling Services Limited is an air conditioning specialist based in Slough. The company covers installation, maintenance and repair work across the surrounding area, with its TW18 postcode placing it well for clients in the Thames Valley corridor. A clean review record sets it apart from less-reviewed local alternatives.
Transparency notice: Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. All other listings are ranked by a combined score drawn from ratings and review counts published on third-party business listings, plus basic completeness signals such as a working website and phone. A Trust Verified badge means we have independently checked that business's documents; businesses without it have not been independently verified by us. How we verify →
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How much does an air conditioning pros cost in Slough?
For a single-room split system in a typical Slough semi or terrace, expect somewhere between £800 and £1,800 fitted, depending on the brand, the length of pipework needed and whether scaffolding or extra access equipment is required. Multi-split systems covering two or three rooms tend to run from £2,500 up to £5,000 or more. Commercial units, like those on Slough Trading Estate, will cost more again because of the higher output needed and often more complex electrical work. Servicing an existing system usually costs between £70 and £150 a visit. It's worth getting two or three quotes, since prices can vary quite a bit between installers even for the same spec.
Do I need planning permission to install air conditioning in Slough?
Most domestic installations count as permitted development, so you won't need planning permission for a standard external condenser unit on a house. That said, if your property is listed, in a conservation area (there are a few pockets around Upton and the older parts of town), or you're in a flat with shared external walls, it's worth checking with Slough Borough Council first. Your installer should be able to tell you whether your specific setup needs a look-in from planning, but the responsibility to check ultimately sits with you as the homeowner.
How long does it take to fit an air conditioning unit?
A single-room split system usually takes a day, sometimes less if the pipe run between indoor and outdoor units is short and there's easy access. Multi-split systems covering several rooms typically take two to three days, partly because of the extra pipework and electrical first fix involved. Commercial installations vary a lot more depending on ductwork and the number of units, so ask for a specific timeframe when you get your quote rather than assuming it'll match a domestic job.
What's the difference between a split system and a multi-split system?
A split system has one outdoor condenser unit paired with one indoor unit, so it's suited to cooling a single room like a bedroom or home office. A multi-split system uses one outdoor unit connected to two or more indoor units, letting you cool several rooms without cluttering the outside of your house with multiple condensers. Multi-split systems cost more upfront but can work out more efficient and tidier than fitting several separate single systems, especially if your garden or side return is on the smaller side, which is common in parts of Slough like Cippenham or Chalvey.
Can air conditioning units also provide heating?
Yes, most modern split and multi-split systems are reversible, meaning they can run in heating mode as well as cooling mode, effectively working like an air source heat pump for a single room or zone. This can be a useful top-up alongside an existing gas boiler, particularly in a garden room or extension that's awkward to run central heating pipework into. Not every unit does this, so if heating matters to you, say so upfront and check the spec sheet rather than assuming it's included.
What should I check before booking an air conditioning installer in Slough?
Ask to see their F-Gas certification, since anyone handling refrigerant by law needs this, and don't just take their word for it, ask for the certificate number and check it if you can. Look at how long they've been trading and read through recent customer reviews rather than just the star rating, since patterns in complaints (missed appointments, poor tidying up) tell you more than an average score. Get a written quote that itemises the unit cost, labour, pipework and any electrical work separately, and get this from at least two or three companies so you can compare properly. Finally, check whether the quote includes disposal of any old unit and what warranty applies to both the parts and the installation labour, since these two things are often covered for different lengths of time.
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