City Gas are your local boiler installation and fitting company with 24 hour emergency support services. We cover all aspects of boiler installations and repairs in London. We specialise in central heating installations in London.
We are dedicated to superior workmanship, punctuality, fair pricing and above all customer satisfaction. All of our employees are polite, considerate, and fully qualified with Gas Safe Register certificates. When dealing with any gas appliances or pipe work; guaranteeing you peace of mind for all your plumbing requirements and boiler installation in London.
Boiler Services
We offer a wide range of boiler installation and heating services including:
Water Main Repair
Boiler Installation
Central Heating Installations
24 Hour plumbing repair |
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We are proud to offer the very best plumbing service in Greater London, serving domestic and commercial clients with the full range of plumbing work, from boiler installations and central heating servicing to emergency repairs for burst water mains and pipes.
Whatever the job, no other plumbing company offers the same excellent work and commitment to customer satisfaction, at great value rates.
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Choosing a new boiler

How old is your boiler?
Boilers over 15 years old are often only around 60 per cent efficient or less (rated G in the SEDBUK* scale), which means that for every pound spent on fuel, 40p is wasted
“At City Gas Services, we recognise that updating your boiler to a modern condensing boiler can be a simple way to reduce fuel bills and improve the energy efficiency of your home. This is why our green range of gas condensing boilers are all over 90% efficient and are A-rated for efficiency, which means they are better for the environment as well as reducing fuel bills.”
Boilers - get in the know
There are three main types of high-efficiency condensing boiler- the combination or ‘Combi’, the system and the regular. Each type delivers the benefits of high-efficiency technology, but is suitable for different types of homes.
‘Combi’ boilers
Combination or ‘combi’ boilers heat your home and provide instant hot water without the need for a tank. Combi boilers are an increasingly popular choice in UK homes and in fact, account for well over half of all the new domestic boilers installed in Britain every year.
Regular Boilers
Regular boilers are suitable for homes with a traditional heating and hot water system. Unlike a combi, regular boilers work on the principle of stored water and require a separate hot water tank, which determines how many bathrooms can be supplied. Regular boilers require more space than either combi or system boilers as they often require an expansion tank in the loft.
System boilers
System boilers also use stored water which allows them to feed several hot water taps at a time, making them ideal for large homes. In contrast to regular boilers, system boilers have most of their major components of the heating and hot water system built in, making them more efficient and less space consuming.
Here are a few examples and guidelines to think about and help you identify the type of condensing boiler most likely suited to your needs.
Consideration |
Most suitable boiler |
You want to use your loft space for a room conversion or other purpose |
COMBI |
You live in a flat or bungalow (i.e. have very little or no roof space) |
COMBI |
Your home has more than 2 bathrooms |
REGULAR OR SYSTEM |
Your main water pressure is low |
REGULAR OR SYSTEM |
You want to replace an old boiler to improve an existing conventional central heating system |
REGULAR, SYSTEM OR COMBI |
There is a need to have hot water available on tap without waiting for it to heat up. |
COMBI |
What type of boiler suites you?
Vailant Ecotec Range
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Worcester Bosch Greenstar Jnr
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Worcester CDI
Boiler
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Worcester Greenstar Ri
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