Boiler Installation & Replacement in Edinburgh

GAS SAFE REGISTERED  ·  WORCESTER BOSCH ACCREDITED  ·  UP TO 12 YEAR GUARANTEE  ·  4.9/5 RATED

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A New Boiler Designed Around Your Home

Replacing a boiler isn’t simply a matter of fitting another appliance with the same output. The right boiler depends on the size and heat loss of your home, the existing heating system, your hot-water requirements, the number of bathrooms and how you actually use the property.

Thermatek Heating provides professional gas boiler installation and replacement throughout Edinburgh and the Lothians. We install modern condensing boilers from manufacturers including Worcester Bosch, Vaillant and Baxi, together with suitable heating controls and system protection.

Before recommending a boiler, we assess your existing system and discuss what you want from the replacement. That might mean a straightforward boiler change, converting an older system to a combi boiler, retaining a hot-water cylinder, upgrading controls or considering whether another heating technology would suit the property better.

Our aim is to specify a system that provides reliable heating and hot water without unnecessarily oversizing the boiler.

Call 0131 235 1236 to speak to member of the team.

Thermatek Heating engineer installing a new boiler and heating system in an Edinburgh home

Why Choose Thermatek Heating for Your Boiler Replacement?

✓Local Edinburgh Heating EngineersWe're based locally and install and maintain heating systems across Edinburgh, Midlothian, East Lothian and West Lothian. You deal with a local company before, during and after the installation.
✓Gas Safe RegisteredGas boiler installation is regulated gas work and must be undertaken by appropriately qualified Gas Safe registered engineers. Our engineers carry the appropriate qualifications for the work they undertake. Gas Safe confirms that anyone carrying out gas work as part of a business must be competent and registered for the relevant work category.
✓Manufacturer-Trained InstallersWe work with leading boiler manufacturers including Worcester Bosch, Vaillant and Baxi, allowing us to recommend equipment according to the property and installation rather than being tied to one boiler for every home.
✓Heating-System DesignWe consider boiler output, hot-water demand, radiators, controls, pipework and system condition rather than selecting a replacement purely from the output of the old boiler.
✓Clear Written QuotationsYour quotation sets out the boiler and controls proposed, the work included and any known additional requirements such as scaffolding, flue alterations or radiator work.
✓Installation and AftercareOnce your boiler has been commissioned, we explain how the heating and controls work and remain available for annual servicing and future support.
✓Outstanding ReputationRated by our customers across every major review platform.
4.9/5Trustpilot
★★★★★Google
4.97/5TrustATrader
Ready to talk it through?Book a no-obligation home survey with a local Gas Safe engineer.Get a Quote

Professional and Reliable Gas Boiler Installers

We’re proud to be Edinburgh’s trusted choice for boiler installation and replacements.

  • Fitting a new A-rated system or combi boiler with energy-saving smart heating controls as standard can save you money on your heating bills. In fact, upgrading a G-rated boiler to an A-rated boiler with full heating controls will save you £420 in Great Britain (GB) and £500 in Northern Ireland (NI) according to a recent article from the energy savings trust.
  • Up to 12 years manufacturer’s guarantee on selected Worcester Bosch appliances and 2 year workmanship guarantee with all of our new boiler installations.
  • We are proud Worcester Bosch, Vaillant and Baxi Accredited Installers. We are also tado° professional installers so you can rest assured that your new system will be as efficient as possible.

If you’re looking for a new combi boiler and expert installers in Edinburgh, we’re here to help. With almost 20 years in the heating industry, you and your family are in safe hands. We cater to all your needs with a selection of boiler types, including combi boilers and system boilers with hot water tanks.

Specialists in heating system design and the installation of gas boilers, unvented hot water systems and low carbon heating systems and we recently have been awarded the most trusted heating and plumbing company in Edinburgh for 2024.

Replacing your gas boiler is a big decision, and with Typical household energy bills increasing by 54% in April 2022 and 27% in October 2022 and prices remaining high since, a new efficient boiler makes a big difference to your home energy bills.

Whether you need an emergency boiler replacement or want to lower your household CO2 emissions, we can survey and correctly size your new heating solution to maximise efficiency and ensure you get the most out of your purchase.

Our gas engineers are qualified in central heating system design for both conventional and low-temperature heating systems.

New Worcester Bosch gas boiler fitted by Thermatek Heating in Edinburgh

Boiler Installation - Our 3 Step Process

1

Free Home Survey

Contact our office, and a member of staff will be on hand to arrange an appointment for one of our highly experienced heating experts to complete a site survey.

One of our engineers will assess your current heating system, discuss your needs, and recommend the best boiler type and size. We can also offer a variety of finance options.

2

Transparent Quotation

You’ll receive a clear, no-obligation quote with all costs explained - no hidden extras.

If you have any questions or would like to change something in the quote, a member of the team will be happy to discuss it in more detail. Otherwise we can book you in for an agreed date!

3

Hassle free Booking and Professional installation

If you're happy with the quote, we will arrange a day and time to start the work and explain what will happen and how long it’s likely to take from start to finish.

One of our friendly, Gas Safe engineers will install your new boiler to the highest standard, test it thoroughly, and show you how to use it. Easy!

Up to 12 Year Boiler Guarantee

All qualifying replacement gas boilers installed by Thermatek Heating benefit from a Worcester Bosch product guarantee. We register your new boiler on installation so that your new boiler is fully covered against faults or failures for up to 12 years on the 8000 model*. In the unlikely event of you having an issue, then simply contact Worcester-Bosch directly, and they’ll send one of their engineers to fix it, providing absolute peace of mind for up to 12 years from the date of registration.

*Provided it is serviced annually and according to the manufacturers’ guidelines.

Get an Instant Boiler Installation Quote

Answer a few quick questions about your home and get an instant estimate for your new boiler, then book your free home survey whenever you are ready.

Get an Instant Boiler Quote

Frequently Asked Questions

We can be in and out for most boiler replacements within 2 days. However, if you have a simple boiler swap, it may only take 1 day.

If you are having additional work carried out by us then this will require more time at your property.

We will provide an overview of timelines and how long we expect to be with you during the quote.

If the job lasts more than a day, the engineers will clean and tidy the area before leaving at the end of the day and aim to leave you with minimal disruption to water supplies and gas while the work is taking place. At the end of the job, the lead engineer will walk you through everything you need to know and see everything with you, including apps and schedules if required, so when we leave, you have a fully functional and easy-to-use heating system.

Yes – replacing a G-rated boiler with an A-rated boiler and full heating controls could save around £420 a year in Great Britain. Some other heating technologies such as air source heat pumps can offer significant efficiency gains compared to gas boilers but they do come with upfront cost for installation. If you would like further information please get in touch and someone will be happy to speak to you about your options.

Yes – we can offer a variety of flexible payment options to spread the cost of your new boiler. You can include any other upgrades too as long as you include a qualifying Worcester Bosch product.

We serve Edinburgh, Midlothian, East Lothian and West Lothian.

Ready for a new boiler?

Book a free, no-obligation survey with a local Gas Safe engineer.

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zoe todd
October 6, 2026
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Used Thermatek for second year for annual boiler service having used them before. Booked a time slot and with reminders in the run up great efficient and polite service. Reliable company and would recommend. Pricing fair for annual gas boiler check and won’t go anywhere else now I’ve found Ryan and his team.
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Susan Barron
October 2, 2026
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Ryan literally saved me from a total nervous breakdown. He came onsite to sort out a leak that was flooding the flat below us and the basement. We couldn’t get anyone to help us, agents, plumbers and our boiler manufacturer. I woke him at 8 am and he was onsite doing the repairs necessary by 10am. Couldn’t have asked for more help. Bill was reasonable, and we are now engaging his company to install a new heating system . Ryan was knowledgable and communication was excellent . Couldn’t recommend Ryan’s business more
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William Oliver profile picture
William Oliver
October 2, 2026
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Was recommended Thermatek by a family member. Required gas hob removed and sink and washing machine taken out in preparation for new kitchen installation. Job was easy to organise at time I wanted it done. Engineer turned up on time. He explained as he went along and all tasks were completed promptly and efficiently. Engineer was very friendly and easy to talk to. Coming back to reconnect washing machine and fit new sink. Wouldn’t hesitate to recommend company.
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Bruce Stockbridge
September 21, 2026
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Inspection of heating and plumbing systems following purchase of new property. Engineer was on time, knowledgeable and executed work to a high standard.
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Victoria Adam
September 20, 2026
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I had previously always used a different, well known Edinburgh company, for all boiler related servicing and work. When it came to fitting a new boiler, the other company seemed unwilling to relocate the boiler into the attic, nor to deal with a system that included an area of underfloor heating, and gave me a very high quote. When Ryan from Thermatek came to take a look, he was really easy to speak with, said the necessary work could be done no problem and gave me a reasonable quote as well as financing info. He was helpful in arranging fitting dates to work around our needs. Two members of his team have subsequently fit a new boiler for us. They were nice guys, lovely to speak with, were professional and left everything clean and tidy. I really couldn’t have asked for better service and will be using Thermatek going forward for the annual boiler servicing.
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Stanley Kadulski
September 17, 2026
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simply the best
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Caroline Casey profile picture
Caroline Casey
September 12, 2026
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Thermatek replaced the cover of my gas meter after my one cracked and was no longer water tight. Service was prompt and friendly.
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Dawn Pearce profile picture
Dawn Pearce
September 10, 2026
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absolutely excellent service very polite and working boiler
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kate jenner
September 10, 2026
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Great service from start to finish. Good communication explaining what was wrong and respected my property and very pleasant to deal with.
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Allan Scott
September 10, 2026
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Great team of guys who always turn up when they say they will . They look at a problem and get it solved quickly. Highly recommend

Our Accreditations

Worcester Bosch Accredited Installer - Thermatek Heating Edinburgh
Gas Safe® Register Reg. Number: 949536
BAXI Approved Installer
tado Professional

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