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

EXCELLENT
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Based on 248 reviews
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Daescu Daniel profile picture
Daescu Daniel
9 days ago
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Great service! Considering we just bought the house and this was our first boiler and gas inspection, Bam have done a fantastic job. He answered all our questions and gave us clear, useful tips. Really professional and outstanding service from the admin person to the service delivery!
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Stephen Mundy profile picture
Stephen Mundy
12 days ago
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Very quick response to a problem with no hot water. Attended within the hour, problem fixed including a boiler service.
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Sunshine 62 profile picture
Sunshine 62
12 days ago
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Had Bam out to service our boiler today. Polite, efficient and helpful. Got on with the job professionally and all in good time with no problems. This company are trustworthy and honest. We wouldn’t use any other company.
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Barbara Drummond profile picture
Barbara Drummond
19 days ago
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I have been using Chelmsford Gas Services before they started their monthly plan, so years! The reason I stick with them is mainly because I trust them, they respond, they visit and get the job done. Highly professional, no cowboys here! The monthly plan gives me peace of mind knowing that if I have a problem they’re a phone call away. And over the years my calls have been from user error [ I hadn’t turned the thermostat up] , I know.. duh, to needing a new pump. And, I want to support a local small business. You won’t go wrong with these guys.
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Graham Chapman profile picture
Graham Chapman
20 days ago
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Very friendly and explained exactly what they were doing, will have them again
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Alison Mitchell profile picture
Alison Mitchell
20 days ago
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Engineer turned up on time and was very efficient. The communication and reminders were excellent. As a landlord I value this. They don’t sub contract out the work so you get consistency.
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Sam Harrison profile picture
Sam Harrison
24 days ago
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Called Chelmsford Gas services to take a look at my boiler. Bam arrived on time and carried out a real thorough service to my Vaillant Boiler, he stripped it down, cleared out the pipes, changed filters, put it back together and filled it to the correct pressures. He was full of useful knowledge and was really friendly. I highly recommend Chelmsford Gas Services !
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Amy Cowler profile picture
Amy Cowler
24 days ago
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Bam and Connor attended our boiler at last minuet and delivered excellent service
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Sue Putt profile picture
Sue Putt
26 days ago
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Excellent service. Clear booking process for a service with reminder email the day before. Updated ETA on the day. Arrived within the agreed time slot. Received report straight away . Highly recommend these services.
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Rob R profile picture
Rob R
26 days ago
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Always a first class service. had my first call for replacement of a radiator valve under there service plan. Great service , Bam the engineer was excellent as always

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.

Piggy bank on radiator

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.