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Step by Step Guide to Gas Boiler Installation

We understand that getting a new boiler installation can be a stressful process. Not only is your boiler an essential supply, it is also one of the most expensive. Your boiler keeps you warm and powers the central heating which provides hot water. As there are so many options to choose from for your new boiler, we have put together a step by step guide to gas boiler installation to help you choose the right one. We will discuss the different types and brands of boilers. As well as the process of the gas boiler installation.

Choosing the Right Boiler for You

The first step in our step by step guide to gas boiler installation is choosing your boiler. Choosing the right boiler for your home can be difficult. You need to choose a boiler that fits in your home, can keep up with the amount of hot water you use and your heating needs. If you currently have a gas boiler, it is best to choose a gas boiler to be installed. This makes the boiler installation easier as there is already a gas supply for the new boiler to be connected to.

When you receive a free quote from FixLink, our expert engineer Mark will help you decide on the right boiler. He will be able to advise you on the technical side of the boiler to ensure your new boiler is large enough to heat your home. 

Choosing the Type of Boiler

The first thing to consider when choosing your boiler for your new gas boiler installation is the type of boiler. There are 3 main types of boilers: combi boilers, system boilers and conventional boiler.

A combi boiler is the most popular option on the market for small and medium sized homes. The majority of new boilers that installed in UK today are combi boilers. They are high efficiency water heaters and a central heating boiler in one unit. As they don’t need a cold water storage tank or a hot water cylinder, this frees up a lot of space in your home. They are compact and space saving. Combi boilers work by heating the hot water instantly and delivering them to the water mains. This means due to the pressure you can get a power shower without the need of any shower pumps.

System boilers are typically a more expensive installation than a combi boiler. But they are a great option for larger properties with more than one bathroom. They require a hot water cylinder . However, the major heating and hot water system components are integrated into the boiler. This makes the installation more compact and frees up loft space as there is no need for a cold water tank. This removes the worries of any leaks or frost damage. System boilers can provide hot water to all your taps at the same time as the system boiler is combined with an unvented hot water cylinder. 

Finally, the conventional boiler is suited for larger homes that use a lot of hot water. They are also known as a regular, traditional or heat-only boiler. They are best suited to homes that already have a hot water cylinder installed. This is because they require a hot and cold water tank. As they require two tanks, they take up a lot of space. Conventional boilers are suitable for properties with older heating pipework and radiator systems. They are a good option in areas where water pressure is low.

Depending on your heating needs and thes size of your home will determine the type of boiler you choose. Whichever one you choose, you should always get it installed by a Gas Safe Registered engineer.

Choosing the Brand of Boiler

The next thing to consider when choosing your new boiler is the brand. There are many brands of boilers to choose from. The main 3 boiler brands you might have heard of are:

Worcester Bosch

Worcester Bosch was founded in 1962. And since then have been awarded Which? Best Buys on multiple occasions. They are one of the best boiler brands out there. Their boilers provide homes all over the UK with effective and efficient heating.


Vaillant was founded in 1874. And in their 140 years of being in the boiler industry they have been awarded the Superbrand status. They have pioneered the most common boiler, the combi (combination) boiler.


Ideal was founded in 1906. They have been making boilers that are reliable for over 100 years. Since they have been founded they have been awarded with The Queen’s Award for Enterprise. The award was for their high levels of excellence and industry-leading technology.

When Should You Get a New Gas Boiler Installation?

The next step in our step by step guide to gas boiler installation is to decide when to get your new boiler. Typically, your boiler should last 10-15 years. To keep your boiler in good shape, you should get it serviced annually. This will help identify any issues with your boiler and get them fixed right away. As your boiler approaches 15 years, you should start to think about getting it replaced.

However, your boiler might start failing before then. So make sure you know what signs to look out for. 

– A rise in your heating bills (this means your boiler is inefficient and uses more energy to heat your home)

– Popping noises

– Hissing sounds

– Your radiators are only heating up slightly, and not as much as they normally would

– Strange smells coming from your boiler

If you have noticed any of these things, then it is time to replace your boiler. Your boiler is very close to breaking down, and it is best to get it replaced before you are left without any heating or hot water.

Getting a Quote

Once you have decided on your boiler and when you are going to get your new boiler, it’s time to get a quote. Most companies will provide you with a free no obligation quote. This means that you choose the best deal for your new boiler.

When receiving a quote, you should have a qualified engineer attend your home. Firstly, they will speak to you and ask what your needs and wants are. Finding out exactly what you want from your new boiler will enable them to help you choose the best boiler. Then, they will assess your current boiler and complete some basic checks. Once they have completed these checks they will talk to you in detail about your quotation. 

The quotation will include:

– The cost of your new boiler and any additional piping

– The labour of installing your new boiler

– New controls for your boiler

– Power flushing your boiler system

You can get a free no obligation quote from FixLink. We provide a quote in the comfort of your home, at a time that suits you. And if you would like a free quote from FixLink, use our Contact Form to request a quote and we will be in touch shortly.

Your Gas Boiler Installation

And the final part of our step by step guide to gas boiler installation is the boiler installation. The day of your gas boiler installation is here. Your chosen company will arrive at your house at the agreed time, ready to install your new boiler.

In the UK, only Gas Safe registered engineers will be allowed to install your new boiler. Firstly, they will remove your old boiler and dispose of this correctly. The next step is to install your new boiler in the requested location. They will connect the boiler to your pumps and pipes to ensure you can heat your radiators and your water. FixLink are keen to provide quality workmanship at all times, reassuring you will get the best boiler installation.

To Conclude our Step by Step Guide to Gas Boiler Installation

Having a new boiler installed is vital to heat your home. And if you are in need of a new boiler, make sure you follow our step by step guide to choose the right boiler and the right company to install it.

At FixLink, Mark is a Gas Safe registered engineer with many years of experience. We install boilers in Tunbridge Wells, Tonbridge and Sevenoaks. When you have your new boiler installed by us, you can be sure that you are getting the best service and installation possible.