What our customers say

We called Ryan on a recommendation to look at our hot water system which had stopped working. Ryan came as soon as he could and though the problem was a mystery he figured it out quickly and came back the next day with the right parts to fix. He was efficient, courteous and helpful. His price was fair and we will use him again. Thanks Ryan. Ina Norrman

Ina Norrman

I have used Ryan a couple of times and he is very professional knows his stuff no job to big or small he has every part needed for the job I can’t recommend him enough and will be passing his details on to friends and family and will not hesitate to call him again if I have anymore problems
a big thank you for reconnecting my cooker again
Grateful customer

Lele Williams

Speedy and efficient job at a fair price. Very satisfied

richard , CM20
Gas / Heating engineer

I had a boiler installed recently and would recommend their services! Reliable, honest and competitively priced.

Lyndsey Page

Great workmanship, friendly and helpful. Assert were fairly priced and trustworthy.
We had our boiler position moved as well as a new one installed. All our needs were met quickly and professionally. We will be sure to use them in the future. Can not recommend enough.

Simon Thompson

Our boiler broke down a week ago and Assert were quick to respond especially given the current circumstances. great value and service, cannot thank enough.
Cheers, all the best.

Omar El-sayed

Very good service. On time friendly & efficient.
Leroy Pitter

Boiler repair. Excellent service

Very quick, clear communication, highly recommend

Alastair , E17
Gas / Heating engineer
back beat

Great service Ryan. Arrived on time, very friendly & sorted out the boiler problem efficiently. We’d definitely recommend your services.

Leroy Pitt

Been using Ryan for all my heating and gas needs over the years.
He’s always prompt and carries out a good job.
Highly recommended.

Eric Ibekwem

Really good work very professional.

Senake Hettiarachchi

Prompt reply, smooth communication.

khalid , E17
Gas / Heating engineer

Ryan was friendly, efficient and knowledgable. He serviced our Worcester Bosch boiler today.

Brian , NW11
Gas / Heating engineer

Cant recommend this guy enough, Assert Heating Services provided a great service during this difficult time. Ryan was professional and clear about the problem I had with my boiler. He took the time to talk me through and show me where the issue was. I didnt feel harrased, he let me think about replacing the boiler before I called him in to do the job. All in all, great job and I now have hot water again. Highly recommend.

helen georghiou

Thank you Assert Heating for your very quick response. Boiler issue was sorted quickly and professionally. Your engineer was polite and respectful of social distancing, wore gloves and mask. Fully recommend!

Elena Sophocleous

Recently used Assert after my usual plumber couldn’t come out quick enough for a burst pipe in one of my properties and am very glad I did. Assert were quick to respond and fixed the issue to a high standard in next to no time. Great service all round. Looks like Assert might be my new port of call for any emergencies.

Quick and professional during an emergency.

Great experience with Assert, can’t thank enough!

charlotte baird

We had a new boiler installed and our old radiators upgraded, the plumbing engineers came on time and everything was very well managed. We are so impressed with the quality of the work and recommend Assert Heating Services highly.
Elaine Wallace

Thank you so much for the great service, the attention to detail really made the work stand out from the rest and I look forward to using Assert Heating for any future heating related work.
Susan Goode

Our boiler is not as new as other makes but your team provided an excellent service. Assert Heating Services reassured me that they could take on any kind of heating system problems, and they didn’t disappoint. Great work, many thanks.
Alice and John McGowan

Having been recommended by a friend, we had no hesitation in asking Assert Heating Services to install a new boiler and central heating system for us. The two engineers that came carried out the work to a very high standard and we are delighted with the results.


We offer extensive gas service solutions. From gas safety checks, gas safety certifications to gas leak repairs and other gas services in London.

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Our team of plumbing engineers work fast and efficiently and can carry out a range of services from routine leaks to advanced system problems.

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Our team of gas safe heating engineers carry out boiler repairs, install state of the art heating systems and implement system upgrades on a daily basis.

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Our rates

Boiler repairs starting from £79 – for all new and existing customers.

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Book an engineer

Get in touch with us today and book your next visit.

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Plumber in London