Avoid this company at all costs. I called them because my boiler was leaking even when switched off. Their engineer told me I needed a part costing £650 and that, realistically, I should replace... See more
Efficiency Boilers
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See what reviewers are saying
Please don’t use this company, no service since installation, put wrong KW boiler , very noisy from all pipes , unable to sleep during night. contacted Tazz many times. Said he will sent engineer, n... See more
Wish I'd never had my boiler changed now. New one has been nothing but trouble, continually breaking down, no hot water again tonight. Company are nice enough, just the boiler they installed is proble... See more
Fantastic service from start to finish, Yassar came out on the Thursday to look at job and carry out quote, by Saturday afternoon the job was completed. Yassar explained everything in full so we under... See more
Company details
Information provided by various external sources
People often find themselves looking for a reliable local company who can provide a competitive price and more importantly an excellent after service, well that's us! Efficiency Boilers is becoming the first choice for homeowners when it comes to a boiler replacement and boiler repair. We can attend to emergency situations and potentially install your boiler within 48hours. Your boiler might be too old and you want that peace of mind ready for winter, then call us today for a free quote! All our engineers have a minimum of 10 years experience ensuring you are left with excellent workmanship and more importantly an energy efficient home for many years to come!
Contact info
71-15 Shelton Street, London , WC2H 9JQ, London, United Kingdom
- 0333 7721 613
- Sales@efficiencyboilers.co.uk
- efficiencyboilers.co.uk
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Avoid this company at all costs
Avoid this company at all costs. I called them because my boiler was leaking even when switched off. Their engineer told me I needed a part costing £650 and that, realistically, I should replace the whole boiler. Because it was already Saturday lunchtime and nothing could be done until Monday, I said I would think about it. Before he left, I asked whether there was a way to stop water going into the boiler so the leak would stop over the weekend. He insisted the only option was to shut off the entire house’s water supply, meaning no heating and no running water at all.
Later that day, I spoke to another engineer—someone a friend put me in touch with—who said that no part for that boiler costs £650 and that isolating the boiler’s cold-water feed is simple and does not require shutting off water to the whole house. In other words, the company not only misled me about the cost of the repair but also tried to leave me without water all weekend, presumably to pressure me into agreeing to an unnecessary and expensive job. Their behaviour was completely dishonest and deeply unprofessional.
Eventually I got it sorted much cheaper with another company.
Never use this company
Please don’t use this company, no service since installation, put wrong KW boiler , very noisy from all pipes , unable to sleep during night. contacted Tazz many times. Said he will sent engineer, never happened, now he changed number, I arranged private engineer, he said previous boiler was 15KW new one they put 30KW doubled that’s why this noice. Installation of this free boiler they charge me £450 pounds , don’t know what to do now ....
The Job was done nicely
The Job was done nicely! The boys was good and left my house clean and tidy Thank You Kassam & Rana :) would definitely recommend to others 👍 👌
I had Kaseem visit to survey for a new…
I had Kaseem visit to survey for a new boiler early December and would have all installation done by Christmas, then heard nothing until the new year when it was arranged for the underfloor insulation to be done. Good sufficient workmen came and said that I would hear within a day or two about the boiler. I Heard nothing for about six weeks when an appointment was made for the installation of the boiler. Three times the date was changed before an engineer arrived with the new boiler. I must admit that the engineer Habeeb was a very good and clean worker, there was absolutely no mess left when he had finished and he worked until very late in the evening. Kaseem kept me up to date with things but would leave me with nothing for weeks on end by which time I had thought I had been forgotten. I had to pay £400 for my 'free' boiler because they could not get the one they had hoped for and said the one I have is an upgrade and more efficient. Apart from the messing about and the silent weeks, I must admit the work was done without trouble or mess.
Efficient and professional
Very happy with the service we received from Efficiency Boilers particularly Kassam our surveyor who arranged our underfloor insulation and boiler replacement and clearly explained the process. Would definitely use again and recommend.
Wish I'd never bothered.
Wish I'd never had my boiler changed now. New one has been nothing but trouble, continually breaking down, no hot water again tonight. Company are nice enough, just the boiler they installed is problematic.
Never ever ever !!!
ATTENTION !!! WARNING !!! The WORST company ever I had to deal with. Ignorant, unresponsive, unprofessional, cheating... Don't believe me ? Keep on reading. Sorry it may be long, but I will try my best to explain everything.
Had to deal with them via the free boiler installation scheme. Firstly they've charged me extra £200 for the flue which supposed to be covered by the scheme, but I was told otherwise. Complete scamming and ripoff. The flue I paid for during the "free" installation became the main issue. I noticed water dripping into my cupboard the very next day. It was the leaking flue so called them out. They came on the other than agreed time and obviously I wasn't at home. Eye witness said the the "fix"was very quick. Changed flue elbow and little piece of wood under the leaking connection. Cheap quick fix turned into a bigger problems as the condensation found it's way to the inside of the flue and run down covering the insides of the boiler ( those brown rusty patches in the pics).
It would be only half of the trouble, but after a few weeks of unnoticed watering the boiler started to make squeaking noises and even shaking dangerously loudly.
Called them and the answer was it couldn't be their problem. They "fixed" theirs and I was advised to call the manufacturer. Engineer came on the other day and diagnosed the problem. The gas valve developed a fault because of the water constantly pouring over so had to be replaced. I was told to use the boiler only if absolutely necessary until the problem is fixed and get in touch with the installer asap. I was also assured the condensation from the flue is due to unprofessional installation. Made them to speak directly with each other over my phone and the installer seemed to understand that they have to fix it (goddammit !). Again.
They came had a look. Found the loose bolt from inside the boiler which holds the flue tight to the boiler itself. Was left with faulty hopes again, as the watering continued soon after they left.
And then the fun begins. Excuses, excuses, excuses...Lots of empty talking, justification, trying to convince me they are superior and done everything they could. The most outrageous thing is they understood it's their fault, but ignorantly advised to book another engineer offering to reimburse me after (come on ! would you believe a liar twice?) or complain to the Gas Safe Register (believe me I will) and they would maybe come fix it during 28 days, because that's the protocol. What ? Do you have some human left under your skin ? Finally I was blocked from contacting them on mobile. Too much hassle, too annoying. It's time to celebrate not to deal with picky customers.
I don't know how would you describe such an individual. You name it. In the middle of the winter and festive Christmas/New Year's time with 3 little kids and only emergency use of the boiler. Thank you very much !
Think twice (probably not enough) before doing the business with them and please remind my story if you decide to deal with such a company. Make them feel ashamed of what they've done and not done. Let them lose the customer's trust because that's what they deserve.

Reply from Efficiency Boilers
Excellent service from first chat to…
Excellent service from first chat to installation a week,very nice lads who came out to fit the new boiler,we 100% recommend this company...
Absolutely amazing surveyor (Taz) and…
Absolutely amazing surveyor (Taz) and installers. Great communication throughout whole process. Can’t believe job was completed in a week. Very Happy customer.
Superb service
Superb service from surveying to installing a new boiker it only took 3 days!!.. Thankyou so much to the surveryor Taz and Installer Faisal ..great communication throught the whole process would highly recommend.. thankyou so much again.
Very fast and good service all done…
Very fast and good service all done within a week the engineers and surveyors were very friendly
Fantastic company
Fantastic comoany, extremly profession. Company went above and beyond to get my boiler installed. 10 out of 10.
Great work!!
Wow!! All done within 2 weeks start to finish from booking assessment and completion of installation! Very good installers, highly recommend them! Keep it up guys 👏👏
*BE AWARE of this company…
*BE AWARE of this company representatives, please use another company to supply & fit your boiler.
All I was doing was getting the best quote for the new boiler as I have a old back boiler & further costs are involved around £1000, a lot of money they take.
So getting the best price & told him this after 10 mins into the appointment.
He became rude & very nasty in my home !! He said we don’t need business like this !! Slammed my door, I went out & I said there’s no need for that & put a finger up at me !!
Guess what this is the owner of the company !!
I’ve never been treated so unprofessionally for no reason !!

Reply from Efficiency Boilers
Floor insulation and boiler
Floor insulation and boiler fitted, Job completed on time, nice and tidy job, guys were very professional and know what they were doing.
Highly recommend the team
Vaillant eco fit sustain boiler installation
The whole process was smooth and had no issues. The surveyor Taz and installer Faisal were very professional and understanding. Would 100% recommend them going forward. Keep up the good work.
Amazing
Hi Sham thanks for the wonderful service it was professionally executed and the work men were really nice and polite thanks for your help
Very professional service
Very professional service. Very quick and efficient. Boiler was fitted within days of having survey. Highly recommended.
The lads that did my boiler worked…
The lads that did my boiler worked really hard very very polite and went that extra mile to help us with anything questions and that
They called and did a survey and within…
They called and did a survey and within a week they came and fitted boiler and did flooring. Everything is working fine. Thanks guys for quick and efficient work.
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