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4 months ago
I asked Chris to quote based on good reviews & was very pleased that he turned up on time, listened to what we were thinking of doing (a new boiler, extra radiators & possible tank removal or move) & then proposed a sensible package. Chris had lots of ideas which we were able to work through until we had a final plan. I had selected a new Viessmann boiler with weather compensation which turned out to be a totally new model & quite sophisticated. Chris worked out how to set up etc & also discovered that our 27 year old boiler was both plumbed & wired in such a way that it had never functioned correctly. Now all fitted & working we are very pleased with both the boiler & how it was fitted. Chris is very easy to work with, his work is very high quality, and everything was kept clean & tidy throughout. We will now use Chris for servicing & the new boiler even lets him know if it has a problem! Would highly recommend to anyone who wants a good job.
- Nick A
a month ago
CMW & Chris recently fitted a replacement boiler for me at short notice, Chris dealt with my problem promptly & very thoroughly from the start. After inspecting my old boiler he gave me several different options with regard to repairing or replacing the 21 year old boiler & went through the pro's & con's. I decided on a new one & Chris recommended one to suit my requirements a Worcester Bosch Greenstar 2000 it was fitted later the same week very efficiently, with minimal disruption Chris worked around an issue with the condenser pipe routing & found a good solution. On completion Chris talked me through the boiler controls & answerd the questions I had. It was refreshing to meet a genuine tradesman & I would not hesitate in recommending CMW Limited for your gas & plumbing needs.
- Steve R
2 months ago
We can only echo the many previous positive comments about Chris. On-time, knowledgeable , efficient, tidy and price as quoted - such a contrast to other gas / plumbers we have used in the past. He installed a Worcester Bosch Greenstar 21r to replace our 30 year old Potterton, also replaced pump, three-way valve (found to not be leaking internally, and replaced a radiator as requested. Chris found some issues with pipework feeding expansion tank and modified pipework to improve system functioning. Outside vent pipes were a bit tricky but a solution was found. I don't normally write reviews but we were really pleased with work. Our house has not been so warm in many years! Thanks again Chris. Brian
- Brian H

Qualified on LPG and Mains Gas

Specialising in affordable gas boiler installation throughout Herts, Beds and Bucks

New boiler installation ,Servicing, Breakdowns 
Smart thermostats
Pipe fitting
Vented/Unvented Hot water cylinders
Landlord Gas certificates and more 

*Finance available on all Boiler installs*
C M W Gas Limited is an introducer appointed representative of Phoenix Financial Consultants Limited ("Phoenix"). Phoenix is a credit broker that is authorised and regulated by the Financial Conduct Authority (Financial Services Register No. 539195) which offers finance for home improvement projects from its panel of lenders. All finance subject to status and credit checks. 
Complaints contact

Which Trusted Trader page 

Vaillant advance installer
Worcester-Bosch accredited  

Previously C M W gas limited 
Registered in England and Wales
Company number: 12992329

Contact Us


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  • 07706 077132
  • 01525 873129


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Bush Close
United Kingdom

Opening Hours

Mon:8:00 am – 5:00 pm
Tue:8:00 am – 5:00 pm
Wed:8:00 am – 5:00 pm
Thu:8:00 am – 5:00 pm
Fri:8:00 am – 5:00 pm
Sat:8:00 am – 5:00 pm
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