Heatzen Reviews 

Jimmy and Cass turned up when booked very professional explained everything. Left everything beat and tidy. Fantastic lads. Better than Dane who put the original installation in. Who was very unprofessional

Fastest boiler replacement, was done with the whole process within two hours

The work is carried out to an extremely high standard, the fitters are very nice people and a pleasure to deal with, the company’s communication is excellent, courteous and very helpful

Do not waste your time with these people. Do not hand over your details. Scammers

Very happy with the service provided by …Jimmy. Excellent jobs done.

I am sharing my honest experience as the homeowner following an ECO4 heating installation carried out by Proximus Solutions Limited (trading as HeatZen) at my property in March 2026.
While a Worcester Bosch combi boiler was installed, the process resulted in severe technical defects, property damage, and missing legal paperwork. After independent audits by Tecnika and Simply Certification validated 11 official Non-Conformances on site, the company's director called me directly to offer an apology. He assured me he would take personal oversight of my case, act as my single point of contact, and personally follow up to ensure every physical, cosmetic, and technical issue was resolved to my satisfaction.
Unfortunately, those assurances were not kept:
Incomplete Technical Remedies: During a remedial visit in July, engineers successfully relocated the boiler flue vertically through the roof (resolving an initial issue where it was routed through a child's wardrobe). However, they failed to fix severe hydraulic shock (water hammer) across my pipework or properly commission/demonstrate the radiator controls.
Unfulfilled Promises & Abandoned Contact: Following the visit, I emailed the director detailed updates outlining what remained outstanding, including promised professional carpet cleaning for stains left by installers and repair of plaster/brickwork damage. Despite explicit commitments to personally manage my case and call me back, I received no further contact and my correspondence was ignored.
Missing Statutory Safety Certificates: Months after the installation and flue alteration, Proximus has still failed to provide or register mandatory compliance paperwork, leaving me without a Gas Safe Register Certificate, Electrical Minor Works Certificate, Building Regulations Compliance Certificate, or Benchmark warranty sign-off.
Breached Scheme Deadlines: Proximus failed to meet the mandatory compliance deadline of 16th July set by their certification body (Simply Certification), despite my written confirmation offering full access and cooperation to complete the repairs.
On 24th July 2026, Simply Certification formally closed their complaint file as unresolved due to Proximus’s default, handing the case over to the Dispute Resolution Ombudsman (DRO).
I acted in complete good faith throughout, but being left without resolution after clear promises leaves me no choice but to pursue resolution via the Ombudsman, the Gas Safe Register, and my Insurance Backed Guarantee provider.

Had a GREAT! experience with Jimmy!
In all honesty i did have some reservations about the whole "New Boiler" as there were a few phone calls to be had first...
But all Jimmy was professional... He comunicated well and explained the whole process and did exacly as he said he would. Jimmy arrived promptly! Worked SO hard in the boiling heat non stop!!! The end result was excellent! We are so happy! We highly recomend!

Jimmy's Very friendly, professional and quick worker!

Jimmy and Billy were fantastic engineers , polite , professional and all round nice guys , thank you both for a great job one very happy customer

Excellent work by Jimmy and Billy, Nothing was a problem for them. Very happy with works done

Jimmy came round and moved a boiler that had been incorrectly fitted. Was a bigger job than seemed, he completed this in super quick time to everyone's satisfaction. Affable, polite, professional and patient. Would absolutely recommend

Waste of time applied for the government grant to be told my household does not meet their requirements, even though it clearly states on their website that qualifying benefits and a old aging boiler that is over the age of 16 years old that does not work and left a venerable household with a 9 month old and 2 over 60s who are vulnerable and with many health conditions with out the appropriate boiler and heating system. Even though on their website it clearly states qualifying benefits and those with children and the elderly who are over the age of 60 with government funding but No just more lies and misinformation. They should definitely change what they have put on their website as it is misleading

Had the survey completed, no contact from them, upon chasing they made a lame excuse about my 83 year old elderly mother.
Therefore I have had no other option but to pay someone else £3700 funded by myself to ensure my Mum has hot water and heating.
Shocking!

Shocking not sure if these where originally called Heatzen this is the name they used when they recently rang Heatzen is who originally installed our boiler but they installed a boiler to big for the cupboard blamed me saying I asked for the boiler but im not the engineer if it doesn’t fit then they should have said it couldn’t be installed now they want me to cut out my cupboards plinth so it would be able to be serviced. I said no and they left it there saying they would come back to me but they have vanished off my WhatsApp, getting on 2yrs the manufacture said they have put on the system that tge warranty with them is void and I took a payment plan out with British Gas and they put warnings on it so who is bringing these people to account for what they do to people it’s a disgrace. Maybe I should get the boiler replaced snd tgen gp through small claims and they do the government grant ones do maybe if anyone knows someone in the DWP who pay these cowboys ask them to take them off the list, there should be some system to make sure these people don't keep ripping people off but they should never be able to claim the grant money or anyone’s money until customers are happy.

jimmy and Billy were awesome!
Very profession and knowledgable
Fantastic job on the boiler and we have hot water anytime! Great job lads!

Provides false information that ECO4 grant is only for old non-combi boiler. When questioned the salesman started shouting at me. Could be rogue traders in the industry.

Jimmy did a great job installing mum’s new boiler.
Would recommend

Both Jimmy and Billy were fabulous, total professionals. Had an issue on Friday which was fixed and meant they didn’t finish until about 8.30pm, Jimmy knew all the technical stuff and was a very quick worker whilst Billy was a superb labourer. I’d highly recommend these lads to anyone.

Contacted heatzen online and within a week I had surveyor round a new boiler, vents & loft insulated immediately.
Jimmy & his team were fantastic making it a smooth, fast installation of the boiler and problem solving. I would highly recommend to use them in future
Arrived punctual and very polite people. 5 star from me! Susan wetherell

I had Jimmy and Billy installing my central heating/boiler.
These guys are very professional and hard workers.
I was explained exactly what will be done and how long it will take.
Any mess was cleared.
Can’t fault them at ALL. Would definitely recommend them.
Nice and hard working lads.