12 Best Heating Engineers in Hemel Hempstead for 2026

🔥 12 businesses · 📍 Hemel Hempstead
✓ Reviewed regularly · ✓ Updated 23 September 2026
Mark Reid
Written by Mark Reid, Trades Editor · Verified 23 September 2026
Hemel Hempstead's mix of housing throws up a fair range of heating jobs. You've got the older terraces and semis around the Old Town with their original cast-iron radiators and sometimes dodgy pipework, the 1960s and 70s estates in Adeyfield and Bennetts End where combi boilers are often on borrowed time, and newer builds out towards Maylands and Buncefield where the systems are modern but still need annual servicing to keep the warranty valid. A lot of local engineers spend their week going between all three, which means they're used to fitting new boilers into tight airing cupboards as much as diagnosing why a 1980s system keeps losing pressure. Hard water isn't a huge issue here compared with some parts of the country, but sludge build-up in older radiators is still common, so a decent power flush comes up a lot on service invoices.

The businesses listed here were pulled from public business listings and ranked mainly on review rating and review count, with a small boost given to those showing a working website and phone number. We then read each business's homepage to check that heating engineering is genuinely what they do day to day, rather than a sideline for a plumber or electrician who happens to mention boilers once on their site. That homepage check is what keeps unrelated trades off this page. Any listing flagged as permanently closed gets removed automatically. Where you spot a Trust Verified badge next to a business, that company has gone through our full verification process, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information. You can read exactly what that involves on our How We Verify page. For businesses without the badge, we'd encourage you to run those same checks yourself before agreeing to any work.

Before booking anyone, ask to see their Gas Safe registration card and check the licence number against the register online, it only takes a minute. Get a written quote that breaks down parts and labour separately, and ask whether it includes a boiler flush or magnetic filter if that's relevant to your job. For anything involving a new boiler, find out what warranty applies and whether it needs annual servicing by the same firm to stay valid. It's worth getting two or three quotes for bigger jobs like a full system replacement, since prices for the same work can vary by several hundred pounds across Hemel Hempstead depending on the firm's overheads and how busy they are that month.
How We Select & Rate The Best Heating Engineers in Hemel Hempstead

Rankings are driven mainly by review rating and review count from public business listings, with a small lift given to businesses showing a working website and phone number. We check each business's homepage to confirm heating engineering is what they primarily offer, 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 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 on this page haven't been independently verified by us, and their inclusion 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 Hemel Hempstead

Our Top Picks

1
Gas Flow Heating
Not Verified
★★★★★ 4.9 (378 reviews)
Hemel Hempstead 01442 971775

Gas Flow Heating spends much of its time in Hemel Hempstead's older housing stock, where ageing boilers and outdated pipework need careful diagnosis rather than straightforward swaps. The firm also fits systems in new builds and flats, adjusting its approach to suit each property's layout. With 4.9 stars from 378 reviews, its handling of tricky older installations has clearly built confidence locally.

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2
Hemel Plumbing and Heating
Not Verified
★★★★★ 4.9 (180 reviews)
Hemel Hempstead 07508 999930

Hemel Plumbing and Heating covers boiler installations, servicing and general plumbing work for households across Hemel Hempstead. The firm has built up a strong local following, reflected in a 4.9 rating from 180 reviews, and continues to take on repair and maintenance jobs throughout the HP2 area.

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3
TDP Heating Solutions
Not Verified
★★★★★ 5.0 (104 reviews)
Hemel Hempstead 07989 570441

Hemel Hempstead households rely on TDP Heating Solutions for boiler repairs, servicing and installations across the HP1 area. The firm has built up a run of 104 reviews with an unbroken five-star average, a reflection of consistent workmanship rather than one-off jobs. Its focus stays on heating systems, without straying into unrelated trades.

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4
Plumb Heating LTD
Not Verified
★★★★★ 5.0 (55 reviews)
Hemel Hempstead 07501 619738

Heating engineering work across Hemel Hempstead is handled by Plumb Heating LTD, covering boiler installation, servicing and repairs for local households. The firm has built up a run of 55 reviews on Google, all rated five stars, reflecting consistency in its day-to-day callouts.

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5
Active Heating and Renewables
Not Verified
★★★★★ 4.6 (25 reviews)
Hemel Hempstead 01442 209008

Families across Hemel Hempstead call on Active Heating and Renewables for boiler repairs, servicing and heating system upgrades, including renewable options for households looking to move away from traditional gas systems. The firm has built a rating of 4.6 from 25 reviews, reflecting consistent workmanship across the HP2 area.

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6
Strong Plumbing & Heating
Not Verified
★★★★★ 5.0 (8 reviews)
Hemel Hempstead 07901 503403

Boiler installation and central heating work form the core of what Strong Plumbing & Heating offers residents in Hemel Hempstead. The company covers both new system fits and existing system repairs, giving homeowners a single point of contact for most heating requirements. HP4 2NT places them within reach of the surrounding Berkhamsted area as well.

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7
Heatelec
Not Verified
★★★★★ 5.0 (7 reviews)
Hemel Hempstead 07960 954944

Boiler installation and servicing form the core of Heatelec's work in Hemel Hempstead, alongside general heating repairs for local households. The firm holds a five-star rating from seven Google reviews, reflecting consistent workmanship on smaller-scale jobs. Based in the HP3 postcode area, it covers surrounding neighbourhoods for both routine maintenance and breakdown callouts.

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8
Hamiltons Plumbing Heating & Bathrooms
Not Verified
★★★★★ 5.0 (6 reviews)
Hemel Hempstead 0333 224 7999

A boiler losing pressure or a bathroom in need of a full refit are typical calls for Hamiltons Plumbing Heating & Bathrooms in Hemel Hempstead. The firm covers heating repairs and installations alongside bathroom fitting, a combination that suits customers wanting one contact for both. Its five reviews, all rated five stars, reflect a small but consistent client base.

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9
Orion Building Engineering Services
Not Verified
★★★★★ 5.0 (4 reviews)
Hemel Hempstead 01442 242100

Families across Hemel Hempstead rely on Orion Building Engineering Services for boiler repairs, servicing and heating installations. The firm works on domestic systems throughout the HP2 area, addressing breakdowns and routine maintenance alike. Its focus stays on keeping household heating running reliably through the colder months, rather than offering a broad spread of unrelated trades.

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10
Gas safe southern
Not Verified
★★★★★ 5.0 (4 reviews)
Hemel Hempstead 07738 000078

Heating engineers covering Hemel Hempstead and the surrounding HP3 area, Gas Safe Southern deals with boiler installation, servicing and breakdown repairs. Work is carried out by Gas Safe registered engineers, giving households confidence that appliances meet current safety standards.

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11
Steve Probert Gas and Heating
Not Verified
★★★★★ 5.0 (3 reviews)
Hemel Hempstead 07990 711342

Calls to Steve Probert Gas and Heating usually start with a boiler that's stopped firing or a radiator that won't heat properly. Based in Hemel Hempstead, the firm deals with servicing, repairs and replacements for household heating systems, working through the diagnosis before recommending a fix. Jobs are arranged directly rather than through call centres, which suits customers wanting a straightforward conversation about what's gone wrong.

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12
Boiler Buddies Ltd
Not Verified
☆☆☆☆☆ No reviews yet New
Hemel Hempstead 07973 850893

Gas boiler installation, servicing, and repair sit at the core of what Boiler Buddies Ltd offers residents across Hemel Hempstead. The company operates within the HP7 9ET area, making it a practical option for householders who need a local engineer rather than a regional callout. Work covers both routine annual servicing and more involved fault diagnosis.

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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 Hemel Hempstead?
A standard annual boiler service typically runs £70 to £100, while a call-out for a fault, say a boiler losing pressure or not firing up, usually starts around £60 to £90 for the first hour. Full boiler replacements vary a lot depending on make and where it's fitted, but expect anywhere from £1,800 to £3,500 for a combi swap including parts and labour, more if pipework needs rerouting or the flue position changes. Bigger jobs like a full central heating system install in an older Old Town terrace can run higher again. It's normal to get two or three quotes before committing, especially for anything over £1,000.
How long does it take to fit a new boiler?
A straightforward like-for-like combi boiler swap usually takes a day, sometimes a day and a half if access to the airing cupboard or loft is awkward. If you're switching from a heat-only or system boiler to a combi, or moving the boiler to a different room, it can stretch to two or three days because of extra pipework and possibly a new flue run. Ask your engineer to confirm the expected timeframe and whether they'll need to turn your water off for extended periods, useful to know if you're working from home.
What certificates should a heating engineer give me after the work?
For any gas work, you should receive a Gas Safety Record or, for a new boiler installation, a Benchmark logbook filled in and signed, plus a CP12 if it relates to a rental property. If the job involved building work covered under Building Regulations, such as a new boiler installation, it should be notified to your local authority via the Gas Safe scheme and you'll get a confirmation certificate through the post. Keep these documents safe, you'll need them if you sell the property or claim under warranty.
Is it worth having a boiler serviced every year?
Yes, most manufacturers require an annual service to keep the warranty valid, and it's the easiest way to catch a failing part before it leaves you without hot water in January. A service usually covers checking the flue, gas pressure, and safety devices, and cleaning any filters. It's also a good moment to ask the engineer to check radiator balance and whether a power flush would help if some rooms are heating unevenly, a common complaint in older Hemel Hempstead properties with mixed-age radiators.
Can a heating engineer help with a cold spot on my radiators?
Usually yes. Cold patches at the top of a radiator point to trapped air, an easy fix with a radiator key. Cold at the bottom, especially on older systems, often means sludge build-up, which may need a power flush or magnetic filter fitted near the boiler. An engineer can bleed radiators and check system pressure during a routine visit, and if the problem's widespread across the house they'll usually recommend a full flush rather than treating each radiator individually.
What should I check myself before hiring a heating engineer in Hemel Hempstead?
Ask for their Gas Safe registration number and check it on the official Gas Safe Register website, it's free and takes seconds. Confirm they hold public liability insurance and ask to see a copy if you're having major work done. Look at recent customer reviews rather than just the overall star rating, and ask how long they've been trading locally. For bigger jobs, get a written quote itemising parts and labour, and ask what happens if something goes wrong shortly after the work is finished, a reputable engineer will offer some form of guarantee on their labour.