Thermofix Services Ltd Reviews 49

TrustScore 5 out of 5

4.8

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Rated 5 out of 5 stars

Excellent service from a reliable company. We've used Thermofix for many years, from annual boiler servicing to the installation of new radiators and fixing of central heating issues. Everyone we've m... See more

Rated 5 out of 5 stars

Gareth and Steve did an excellent job installing our Air Source Heat Pump. Started with a really thorough heat loss survey, talked us through options and siting. Managed the boiler upgrade sch... See more

Rated 5 out of 5 stars

Having Jamie come and sort our boiler and heating was such a relief after being taken for a ride by several other companies. So friendly and personable, has your best interests at heart and expla... See more

Rated 5 out of 5 stars

We've used Thermofix on a number of occasions for our boiler and gas fire servicing. They are always very friendly, caring and highly professional. In October last year Jamie replaced our gas hob with... See more

Company details

  1. Central Heating Service
  2. Heating service
  3. Plumber

Written by the company

Thermofix are an independent heating company focused on Sheffield and the surrounding areas. We specialise in the servicing, repair and installation of boilers and central heating systems.


Contact info

4.8

Excellent

TrustScore 5 out of 5

49 reviews

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Rated 5 out of 5 stars

Excellent service!

Excellent service from a reliable company. We've used Thermofix for many years, from annual boiler servicing to the installation of new radiators and fixing of central heating issues. Everyone we've met from Thermofix have been extremely friendly and professional, giving us clear advice and charging fair prices. Would strongly recommend!

14 April 2026
Unprompted review
Rated 5 out of 5 stars

Couldn’t ask for better

Couldn’t ask for better, from responsive initial contact, clear and competitive pricing through to completion of a not very straightforward job, Gareth and Steve were knowledgeable, professional and excellent problem solvers. Thank you.

6 January 2026
Unprompted review
Rated 5 out of 5 stars

Very professional

From start to finish a thoroughly professional job. We needed a bespoke solution for our heating and very few other companies were interested in taking on the job. Thermofix were incredibly knowledgeable and clearly cared about designing a system that would work well for us. The fitting was carried out with minimal disruption and the communication was also top notch. Would highly recommend.

21 July 2025
Unprompted review
Rated 5 out of 5 stars

Very helpful

Gaz was great. Really good advice, and honest. Not trying to up sell but gave me lot of information about all of my options. Would definitely recommend.

20 March 2025
Unprompted review
Rated 5 out of 5 stars

Gaz and Stephen

Gaz and Stephen, have been great with us, very up to date knowledge base, genuine skilled blokes. Trustworthy and hardworking. Couldn’t ask for more

26 February 2025
Unprompted review
Rated 5 out of 5 stars

First class boiler fitting

From booking the installation of a boiler, a radiator and a heated towel rail, to completion the service was excellent. Jimmy and Steve were friendly and professional and carried the work out to a high standard. We are more than happy with the price and the 10 year guarantee. If you need a boiler fitted we would highly recommend Thermofix.

6 February 2025
Unprompted review
Rated 5 out of 5 stars

Gas Engineer

I have used Thermofix for a few years now to service my boiler. A professional job is always provided and I have always found the engineer to be completely trustworthy. I have recommended to friends who are also happy with the service.

6 February 2025
Unprompted review
Rated 5 out of 5 stars

Expert Heat Pump installation

Gareth and Steve did an excellent job installing our Air Source Heat Pump. Started with a really thorough heat loss survey, talked us through options and siting. Managed the boiler upgrade scheme process with us.

They were really thorough in checking existing pipework, radiators etc.

Installed just before the cold snap and has been providing a COP of 420% (we get about four times out what it uses in electricity).

Great service

4 November 2024
Unprompted review
Rated 5 out of 5 stars

Mighty Fine

Arrived on the date and at the time, arranged good communication, clean tidy and great value.
Don't think we will be looking anywhere else for heating issues.

12 November 2024
Unprompted review
Rated 5 out of 5 stars

Installing a new Worcester Bosch boiler

I contacted Gareth based on a recommendation from another tradesman, I was not disappointed. We needed to replace our 12 year old boiler, which had proved inefficient, I contacted Gareth and he came out within a day, he assessed our needs , I am a once every 12 year expert on boilers and know that Gareth’s price was very competitive and I was impressed by his efficient manner and we arranged a fitting date for 2 weeks time.
Gareth delivered the boiler the day before fitting and he arrived promptly on fitting day and proceeded to carry out the fitting quietly, efficiently, cleaned all surrounding areas and the boiler was up and running by 6 that evening,perfect!
His promised after sales service gave me confidence for the boilers future operation
All in all it was a 5* performance and I can thoroughly recommend Gareth and Thermofix without reservation

26 September 2024
Unprompted review
Rated 5 out of 5 stars

NIBE F2050 10kw heat pump with VVM

Thermofix have looked after our boiler and dilapidated heating system for many years and we are so pleased that we chose to upgrade to a NIBE Heat pump.
Gareth, Steve & Jim are reliable, friendly, skilled, knowledgeable, trustworthy and professional heating engineers. They talked us through options and were happy to answer any questions and in just one week changed our outdated and inefficient one pipe system to a efficient heating system. We are amazed by how quiet the system is and how they worked around us with minimal disruption, a clear timetable and excellent communication. They are also very tidy, a pleasure to have in our home and we would highly recommend. Thank you :)

6 August 2024
Unprompted review
Rated 5 out of 5 stars

New boiler installed today

New boiler installed today, both engineers were polite , clean and efficient and took time to explain how things worked
I have also had boiler serviced by Gareth for many years he is a lovely bloke and makes you feel comfortable and does a thorough job

11 June 2024
Unprompted review
Rated 5 out of 5 stars

What a great team

What a great team! Thermofix did a terrific job in installing my air source heat pump. It was not an easy installation as they had to deal with an old, badly installed central heating system. However they found solutions to all the obstacles they encountered. They linked the system to my solar panels, giving me one of the most energy-efficient systems on the market. Thank you!

3 May 2024
Unprompted review
Rated 5 out of 5 stars

Very neat and quick!

Steve and his team at Thermofix were fantastic. They are super busy but managed to fit us in earlier than their original date.

They gave us lots of useful advice and did a super neat job at our house. They were very thorough, helpful and gave us advice to get best boiler for our needs.

He went above and beyond for us - thank you!

4 February 2024
Unprompted review
Rated 5 out of 5 stars

Professional from first phone call

From the start this company reacted quickly to the loss of heating and arrived on time. Carried out the work professionally and were just so efficient. Definitely use again and would recommend to family and friends

11 January 2024
Unprompted review

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