9 Best Heating Engineers in Slough for 2026

🔥 9 businesses · 📍 Slough
✓ Verified Google reviews · ✓ Reviewed regularly · ✓ Updated 4 September 2026
Mark Reid
Written by Mark Reid, Trades Editor · Verified 4 September 2026
Slough's housing mix throws up a fair range of heating work, from the 1930s semis around Cippenham and Chalvey with their original pipework, to the newer developments near Slough Trading Estate and Langley where combi boilers are more the norm. A lot of homes here still run on older gravity-fed systems or back boilers that need specialist knowledge to service properly, while flats above the shops on the High Street often have compact system boilers tucked into kitchen cupboards with tight access. Whatever your setup, a decent heating engineer needs to know the difference between a job that's a straightforward service and one that's going to involve draining down a whole system or dealing with sludge in old radiators.

The businesses featured here are drawn from public business listings, ranked by their review rating and how many reviews they've built up, with a small lift given to those showing a working website and phone number. We check each business's homepage to confirm heating engineering is genuinely their main line of work, which stops plumbers, electricians or general handymen who dabble in boilers from cluttering up the page. Any listing flagged as permanently closed gets removed as part of that process. Where you spot a Trust Verified badge on an individual business, that firm has gone through our fuller check, 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. Businesses without the badge haven't been through that process with us, so it's worth running your own checks before you book anything.

Before you commit to a heating engineer, ask to see their Gas Safe registration card and check the licence number against their photo, since anyone working on gas boilers or gas fires legally has to hold this. Get a written quote that breaks down labour and parts separately, and ask what's included if the job overruns, particularly for jobs like a boiler swap where old pipework can throw up surprises. For a new boiler installation, ask whether they'll provide a Benchmark certificate and register the warranty with the manufacturer, since a missing certificate can invalidate cover down the line. It's worth getting two or three quotes for anything above a simple service or repair, both to check the price feels fair and to see how each engineer talks you through the work.
How We Select & Rate The Best Heating Engineers in Slough

Rankings are based on review rating and review count pulled from public business listings, with a small lift for businesses showing a working website and phone number. We check each homepage to confirm heating engineering is the main service offered, which keeps unrelated trades off the page. Listings flagged as permanently closed are removed automatically. Businesses marked Trust Verified have gone further, passing our full check on 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 here haven't been independently verified by us, and appearing on this page 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 →

Quick Comparison — Heating Engineers in Slough

# Business Rating Reviews Phone
1 5 Stars Gas ⭐ 5.0 88 07306 787931 View →
2 The Heat Chief ⭐ 5.0 53 07306 604765 View →
3 GASPEC LTD_Gas, Heating & Plumbing Services ⭐ 5.0 37 07709 278206 View →
4 KAM Plumbing & Heating Services ⭐ 4.6 56 07791 848655 View →
5 Mk gas and electric ltd ⭐ 5.0 28 07405 887251 View →
6 ZR Heatings ⭐ 4.5 36 07301 908104 View →
7 The Most High ⭐ 5.0 16 07726 756196 View →
8 Dils Plumbing and Heating Services ⭐ 4.8 16 07846 654661 View →
9 AM UFH Ltd ⭐ 5.0 3 07456 482349 View →

Our Top Picks

1
5 Stars Gas
Not Verified
5.0 (88 reviews)
Slough 07306 787931

Most calls start with a boiler that has stopped firing overnight or a landlord needing a gas safety certificate before new tenants move in. 5 Stars Gas, based in Slough, handles these jobs alongside routine servicing, and its 88 reviews averaging five stars point to consistent reliability rather than one-off praise.

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2
The Heat Chief
Not Verified
5.0 (53 reviews)
Slough 07306 604765

Families across Slough rely on The Heat Chief for boiler repairs and servicing when heating systems fail or need routine attention. The firm has built a following locally, reflected in a five-star rating from 53 reviews. Work is carried out with attention to household schedules, keeping disruption to a minimum.

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3
GASPEC LTD_Gas, Heating & Plumbing Services
Not Verified
5.0 (37 reviews)
Slough 07709 278206

Boiler installation and breakdown repairs form the core of GASPEC LTD's work in Slough, alongside general heating and plumbing tasks for local households. The firm holds a 5 star rating from 37 reviews, reflecting consistent standards on jobs ranging from routine servicing to full system replacements.

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4
KAM Plumbing & Heating Services
Not Verified
4.6 (56 reviews)
Slough 07791 848655

Older properties around Slough with ageing boiler systems make up a good share of KAM Plumbing & Heating Services' workload, alongside routine servicing for flats and family homes. The firm handles installations, repairs and heating faults, and has built up a 4.6 rating from 56 reviews. Work is generally arranged through direct enquiry rather than callout apps.

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5
Mk gas and electric ltd
Not Verified
5.0 (28 reviews)
Slough 07405 887251

Families across Slough call on Mk Gas and Electric Ltd for boiler repairs, servicing and general heating work. The firm has built a local reputation for reliability, reflected in a 5-star rating from 28 reviews. Households in SL2 5DT often turn to it when a heating system needs sorting quickly.

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6
ZR Heatings
Not Verified
4.5 (36 reviews)
Slough 07301 908104

Heating engineers based in Slough, ZR Heatings covers boiler repairs, servicing and installations across the local area. The firm has built up a 4.5 rating from 36 reviews, reflecting consistent workmanship on domestic heating systems. Customers can get in touch through the company website to arrange a callout or quote.

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7
The Most High
Not Verified
5.0 (16 reviews)
Slough 07726 756196

Landlords and letting agents in Slough use The Most High for boiler servicing and heating repairs, work that often needs scheduling around tenants and turnaround deadlines. The firm holds a 5 star rating from 16 reviews, reflecting consistent reliability across rental properties rather than one-off domestic jobs. Property managers can arrange call-outs directly through their website.

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8
Dils Plumbing and Heating Services
Not Verified
4.8 (16 reviews)
Slough 07846 654661

Landlords and letting agents managing rental properties in Slough turn to Dils Plumbing and Heating Services for boiler repairs, servicing and general heating work that keeps tenancies compliant and tenants comfortable. The firm holds a 4.8 rating from 16 reviews, reflecting consistent follow-through on jobs that often need scheduling around occupied properties and tight turnaround times.

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9
AM UFH Ltd
Not Verified
5.0 (3 reviews)
Slough 07456 482349

Customers usually get in touch when a cold room or an ageing boiler points to problems with underfloor heating or wider system design. AM UFH Ltd, based in Slough, works through the diagnosis and installation stages needed to get such systems running properly. Jobs typically involve heating engineers assessing existing pipework before fitting or upgrading equipment.

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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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Frequently Asked Questions

How much does a heating engineer cost in Slough?
A standard boiler service typically runs from £70 to £110, while a repair for something like a faulty diverter valve or PCB might land between £150 and £350 including parts. A full boiler replacement, say swapping an old back boiler for a new combi, tends to sit between £2,000 and £3,500 depending on the make, flue routing and whether pipework needs upgrading. Prices vary depending on access, the age of your system and how far the engineer has to travel within Slough. It's normal to get two or three quotes before booking anything beyond a basic service.
Do I need a Gas Safe registered engineer for boiler work in Slough?
Yes, for any work involving gas appliances, including boilers, gas fires and gas cookers, the engineer must be Gas Safe registered by law. Ask to see their ID card, which shows their licence number and what specific gas work they're qualified for, and you can also check the number on the Gas Safe Register website. For non-gas work like electric heating or unvented hot water cylinders, different qualifications apply, so ask what's relevant to your job.
How often should I get my boiler serviced?
Most manufacturers recommend an annual service, both to keep the warranty valid and to catch small issues like a dropping pressure or a failing pump before they turn into a full breakdown. If your boiler's getting on a bit, say ten years or older, some engineers suggest a check partway through the year too, particularly before winter kicks in and demand on the system increases.
What's the difference between a combi boiler and a system boiler, and does it affect cost?
A combi boiler heats water on demand and doesn't need a separate cylinder, which suits smaller Slough properties like flats or terraces with limited space. A system boiler works with a hot water cylinder, often better suited to larger homes with more than one bathroom where several taps might run at once. Swapping between the two types usually costs more than a straight boiler-for-boiler replacement, since it involves extra pipework and sometimes removing an old cylinder from an airing cupboard.
Can a heating engineer help with cold radiators or a noisy heating system?
Yes, cold spots at the top of a radiator usually point to trapped air, which is a quick bleed job, but cold patches at the bottom often mean sludge build-up that needs a power flush. A banging or gurgling boiler can be down to limescale, a failing pump or air in the system. Most heating engineers will diagnose this on a call-out, typically £60 to £90 for the visit, before quoting for any further work like a flush or pump replacement.
How do I choose between the heating engineers listed here?
Start by checking their Gas Safe registration yourself on the official register, since that's not something we verify for every listing on this page. Read through their recent reviews for mentions of punctuality, tidiness and whether they explained the work clearly, then ask for a written quote and a rough timeframe for the job. If you spot a Trust Verified badge, that business has already been through our deeper check on qualifications, insurance and trading history, but for anyone without it, it's worth asking to see proof of insurance and recent customer references directly before booking.