Efficient central heating system design and installation
We’re true experts and always get the job done properly
Why use Chelmsford Gas Services to design and install your system?
An A-rated boiler only performs at that level if it is installed correctly and finely tuned with your whole heating system.
Quite simply a boiler is only as good as the gas engineer that installs it. The importance of a competent installer cannot be understated.
Our engineers all have over a decade of experience, training and expertise and we never subcontract.
See what our customers say
Posted on Google![]()
Dan Green8 days agoTrustindex verifies that the original source of the review is Google.
Bam was fantastic. Arrived on time. Communicated efficiently and clearly. He was thorough, clean and tidy & I will not hesitate to book again.Posted on Google![]()
Beverley Eckhart17 days agoTrustindex verifies that the original source of the review is Google.
Chelmsford Gas Services were brilliant. The gas service was thorough, efficient, and professionally done. Everything was clearly explained, and the engineer was friendly and reliable. Great service overall — highly recommend.Posted on Google![]()
Lauren Sheppard18 days agoTrustindex verifies that the original source of the review is Google.
Bam from Chelmsford Gas Services was great. Professional, friendly and efficient. Explained everything he'd done clearly afterwards and how to reset the pressure. Highly recommend!Posted on Google![]()
Jerome Holland22 days agoTrustindex verifies that the original source of the review is Google.
Chelmsford Gas Services have been looking after our home for several years now. They are proactive in contacting us to organise our yearly service, and arrive promptly and provide excellent service. I would not hesitate to recommend them, a great local family run business.Posted on Google![]()
Stephen Nicklin27 days agoTrustindex verifies that the original source of the review is Google.
All round great service - very pleased I took out the service last year. From Office staff - Joanne, to the engineers - Richard and Connor - great friendly service.Posted on Google![]()
Harry Bodian30 days agoTrustindex verifies that the original source of the review is Google.
After using a number of national service schemes, I hadn’t been too impressed and have given Chelmsford Gas a try. Needless to say the experience is a million times better. Bam was experienced, friendly and explained exactly what he was doing and saw during the service. Would recommend.Posted on Google![]()
Sue Roberts37 days agoTrustindex verifies that the original source of the review is Google.
As usual we received excellent service from Bam at Chelmsford Gas. Always on time, giving advance warning that he was on his way. The boiler was given a thorough service & we were advised that everything was working well but that there were parts that would need renewing at the next service & that this would all be put in hand so that the parts were with him when he comes next year. Would thoroughly recommend Chelmsford Gas.Posted on Google![]()
Jo40 days agoTrustindex verifies that the original source of the review is Google.
Had our boiler serviced today by Bam. Very professional and respectful throughout, Bam explained the issues he found and showed pictures. We were recommended to Chelmsford Gas Services by a friend and I am very impressed today as a new customer.Posted on Google![]()
jacqui41 days agoTrustindex verifies that the original source of the review is Google.
Thank you to Bam for providing such a friendly and excellent service. I will definitely use Chelmsford Gas Services again in the futurePosted on Google![]()
Jean Harper43 days agoTrustindex verifies that the original source of the review is Google.
Arrived on time, very professional, good value
Everything you need to know about boilers
Boilers aren’t A-rated out of the box
Most A-rated boilers only actually perform at C or E rated within the home.
Why?
Well, modern condensing boilers are much more complicated than non-condensing boilers.
They need to be finely tuned to the individual heating system in order for them to run at the highest efficiency. Matching the boiler to the system is a complicated task, involving setting the correct flow rates and DT cross the emitters (radiators).
To achieve this you need a good boiler to start with. Unfortunately many A-rated boilers available in the UK market do not have the ability to fine-tune them to the system. Lots of boilers are installed with the incorrect controls as many heating engineers don’t have the knowledge to make them work efficiently.
Smart thermostats are also frequently installed incorrectly and do not necessarily make your system more efficient.
Gas Safe Registration only means knowledge about safety, NOT efficiency
Gas Safe engineers are simply trained to install gas pipes and flues safely. Of course, that’s vital. But although everybody on the gas safe register can do this job safely, very few are trained to work on efficiency.
There is no legislation to ensure that installers get adequate training on heating systems and how to get the most efficiency out of a boiler. This means that there are huge skill gaps within the industry.
To get the best efficiency out of your boiler you need to look at the whole system. It needs to be cleaned and balanced properly.
99% of installers cannot set up a gas boiler to run at the best efficiency.
But all our engineers at Chelmsford Gas Services are different. We’ve done all of the training and are the only Heat Geek certified installers in a wide area, to make sure that we are within the top 1% of installers that can get the job done properly and get the best out of an A-rated appliance.
Get a quote in 5 minutes
Use our online quote builder tool to get an estimate quickly and easily. All you need to do is answer a few questions and we’ll give you some options and prices.
You can then book an appointment to either ask any questions or go ahead.
PS the quote builder looks different to our website at the moment as it’s not yet been updated to our new look – don’t worry though, it’s still us.



