Their product is extremely unreliable. My interface unit broke every 3 or so years and you have to pay hundreds to get that repaired. Also they don't have any emergency services so if your unit brokes... See more
Company replied
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Their product is extremely unreliable. My interface unit broke every 3 or so years and you have to pay hundreds to get that repaired. Also they don't have any emergency services so if your unit brokes... See more
Company replied
As soon as I reported my problem I had an engineer contact me within an hour. He came & faced many problems trying to fix my boiler but didn’t leave till it was done. Such a lovely engineer & super fr... See more
Company replied
Absolutely terrible - avoid at all costs, overpriced and inconsistent service, bizarre billing, wrongly installed equipment, we are moving out after 6 months due to constant issues. (in E17)
Company replied
Yunus was professional and so knowledgeable. As someone who doesn’t know absolutely anything about heating, he explained everything really well, answered any questions I had and did a fantastic job so... See more
Company replied
Evinox Energy, founded in 2002, has built a strong reputation for its innovative approach to heat interface units (HIUs) and smart energy monitoring systems, playing a key role in the UK’s transition to low-carbon heating solutions. In 2023, Evinox Energy merged with Minibems, a company known for its advanced digital platform for optimising the performance of heat networks. Minibems was founded with the goal of improving the efficiency and management of heat networks through real-time control and remote management software technology. The merger of Evinox Energy and Minibems combined Evinox’ expertise in hardware and system design with Minibems’ cutting-edge digital controls and data analytics. This strategic partnership aims to create a more integrated and efficient solution for managing communal and district heating systems, enhancing the value provided to clients and supporting the UK’s goals for net zero heating. Evinox has over 20-years experience with thousands of installations across the UK, including prestigious developments such as Battersea Power Station and City Island, Canary Wharf.
Evinox UK Ltd, Unit 37, KT9 2NY, Chessington, United Kingdom
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Evinox are completely useless. I am unable to change to a different supplier as I own an apartment that makes use of a communal heating system, but if I could I would drop them immediately. They have a track record of billing me incorrectly. However, they have now exceeded themselves by persisting in billing me for hundreds more kWh than I have used. This is despite my having provided them with the correct readings and having photos of the meter readings as proof. The next step is for me to report them to the ombudsman.
Elton was brilliant. He arrived on time, fixed our problem, was very friendly and stayed to make sure everything was working correctly. He talked me through how to use the heating system. Very happy with the service.
Company is extremely unprofessional
Had to call the company multiple times and they still haven't fixed a simple issue of online registration. Now I'm here on a Saturday without any heating because they can't fix their issues.
After a series of e-mails, the customer service was telling me to do things that they did earlier.
I would not recommend this company to anyone, and since my building is locked to it, I'm stuck.
This is not 1990 where I need to call to solve stuff, online websites need to be the standard, so fix your issue.
I must admit I haven't always found it easy to contact Evinox. However, on this occasion, with a one-year-old baby in the house and no hot water or heating, they came up trumps. Polite and efficient customer service from Nikki and impeccable work from Lee, who went beyond the call of duty to solve the problem in double quick time.
Two months to reply to an email, even then just told me to speak to another company or pay them to come and fix their faulty device which isn't calculating a correct meter reading. Truly shambolic company run by crooks - avoid at all costs.

Reply from Evinox UK LTD
Elton was great. He fixed the leak, he had the part he needed. Saved us so much stress and worry. Honestly he is so polite and sharp for the job !
Elton came this morning to fix an ongoing problem. We now have hot water without having to run the water until in finally gets hot, plus he has now repaired the leaks which have been an on going problem for some time . He was polite and explained everything he was doing. Thank you Elton.
I had Elton who came and did a fantastic job, his personality and demeanour is awesome. I wish him all the very best in his future. He did make EVINOX very proud in terms of customer satisfaction.Great work Elton!
Terrible service. No out of hours support. If your hot water goes on Friday past 17.30, there's no way of getting into contact with them to fix the issue. Our meter is showing that we're out of credit despite the direct debit being paid this morning and yet we have no way of resolving this issue over the weekend because Evinox provide no emergency maintenance.

Reply from Evinox UK LTD
Ask to pay £110 monthly for a single person living in a small London flat. And there is no ways of investigating. It’s outrageous!

Reply from Evinox UK LTD
I had to call them due to an issue with my wall unit. I found every one I spoke to in every division extremely helpful and informative. At no point did they brush me off, but gave me info I needed and were able to reset my unit remotely.

Reply from Evinox UK LTD
I don't understand how a home heating company can get away with closing on weekends and bank holidays. They don't even have an emergency phone number. If your heat or hot water is out on a weekend, you just have to wait. If it happens to be Christmas, you're out of luck from Christmas Eve at 12 noon until the 29th!

Reply from Evinox UK LTD
I received this email today-
Dear Customer,
"Please find attached your latest Energy Bill/Statement for usage from occupation to 30/11/2021, or any outstanding balances for a former period of occupation at xxx "
I left the property more than a month ago. The customer service who assisted was probably one of the most condescending and discriminating service staff I have ever come across. The call started with giggles at the back and when explained I don't live at the property anymore, she asked me to open the pdf attached in email. It showed a balance of zero, she said "this is why you should open your attachment".
I explained I'm calling because your email reads as above for usage or any outstanding which is none, so why contact me with such email. She said I was assuming what I read.
I don't have an English accent as I'm not local but I did grow up speaking three languages and English is my first language dear Evinox. I have every right to be angry at someone who indirectly discriminate me for who I am, and said I assumed when I explained that their email read bill/statement for usage or outstanding balance. That gives their intention to contact via email in the first place and so poorly written with contradiction. Yet she was so defensive, playing victim when I mentioned she was indirectly discriminating me and doubted what I read in their random email!
Evinox, please stop insulting consumers. If you cannot even formulate an email and have the audacity to tell me I am assuming what I read, please do hire a professional proofreader and educate your service staff. No one would bother to call in unless there is an issue hence the placement of customer service. If you prefer to talk me down just because you are local, please look at yourself- you can't even write an email with the right intent and content. This customer service did not even bother to explain, so poorly trained. The manager I spoke with was equally terrible, never allowed me a chance to speak, went on and on. Who trained these people?
They can deny all they want, look at their ratings here and on Google. It's terrible like their attitude.
Avoid them!
My elderly Father-in-Law received a grossly inaccurate Cold water bill from Evinox in July this year. We phoned originally and was told to put our concerns in an email. Having done so we were told an Account Manager would contact us to resolve the matter shortly. Well fast forward 50 (Yes, 50!!!!) days and countless emails chasing them, we are still waiting for this issue to be addressed. This has caused my 80 year old father-in-law so much stress and anxiety I can't even describe it. The Customer Service is non existent to the point of downright negligence. I would tell anyone considering using this company for anything at all to run a mile!
We have used their service since december 2019. We have to date never received a cold water bill. And today they sent us an over £600 bill out of the blue for cold water, that we are seeing for the first time since we moved to this property.
Is this fair ?? We have been paying the hot water and heating bill on a monthly basis on time. This is ridiculous. If this bill was due, why werent we sent the bill along with the other bill on a monthly basis. What is this ?

Reply from Evinox UK LTD
Evinox have been servicing our boiler for the past 15 years or so and we have always found the service and professionalism to be outstanding. Response times are fast - usually the same day, and the service technicians are always extremely friendly and helpful. We can highly recommend Evinox to anyone installing a high quality heating/hot water system, as they also provide great advice on the best way to operate your system.
Also, unlike other companies that service boilers (which we used in the past) Evinox actually fully clean the boiler at each service, meaning that we have had 20 years of operation of our boiler with no need to replace the boiler, as the quality of the boiler (brass parts - not plastic) PLUS the quality of the service by Evinox ensures decades of hassle-free operation.
Thank you so much Evinox!
Very pleased with the service. They have looked after my small block for 5 years and the emergency call out has been very helpful. Original design team helped a lot.
Georgia in service always very responsive.
Olivia was extremely helpful & her customer service was exceptional. Lovely to speak to a friendly person first thing in the morning. Reassuring to speak to her. :)
Excellent service support and help from Olivia Armstrong. Always nice when companies do what they promise. Olivia was determined to assist me , no matter how long it took.
Thank you for your patience, much appreciated.
Could not recommend Evinox more highly for boiler replacement, which we have just had done, and for servicing which we have had for many years. I can't resist sneaking into the cupboard where the tank is to look at the beautifully installed pipes and to look at all the whirring pumps. The Vaillant boiler now adjusts off our phones. Top engineer fitted it all. Excellent, quality job.
Bit baffled by the adverse comments on website here on what looks like billing and servicing in flats - a different department, perhaps? Horses for courses. Every reason to have a boiler installed by these people.
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