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Boiler installation guide

When you decide to have a new gas boiler you need to follow a certain process to get the right product for your home, at the best price, fitted by a qualified installer.

This is what we recommend if you want to install a Baxi boiler:

Find an installer

You need a qualified, Gas Safe registered installer to carry out a survey of your home and advice you of the type of boiler you need for all your heating and hot water requirements. They will look at your existing system to determine whether you need any replacement pipework or controls to meet the latest Building Regulations, and will also evaluate your home - number of rooms, windows, insulation etc - to calculate the output of boiler to suit your needs.

Remember, if you're planning to install renewable technology in your home, you'll need to check that any engineer working on it is registered with the Microgeneration Certification Scheme (MCS), so you can claim any available grants or incentives.

We recommend you get three quotes from installers to do the work. You may have recommendations from friends and family, or you can use Baxi find an installer. Simply enter your postcode and you'll find Gas Safe registered heating engineers in your area.

Choose three installers from the list, and to make life easier we'll get them to call you to quote for the work. 

Schedule the work

Once you've accepted a quote for your boiler installation, your engineer will schedule the work. Straightforward installation of a combi boiler typically takes around a day. They should also carry out a power flush of the system to get rid of all the debris in the system.

You won't need to be around while the work is being carried out, but it's a good idea to make yourself available at the start and finish of the project. At the start you can meet the installer to fully understand the extent of the work. When the installation is complete, the installer will complete the Benchmark checklist to show you how the boiler works and how to operate the controls properly.

Boiler registration

When the boiler has been installed, you have 30 days to register it. Registering the boiler is a requirement of the warranty.

Baxi boilers must be registered by your Gas Safe registered installer, so for your own peace of mind, you may want to direct them to

If the new boiler is a Baxi Ecogen - or if you've installed any other form of renewable technology - you'll also need your installer to register you on the MCS database and supply a certificate.
Keep the certificate safe, as your energy supplier will ask to see it when you start claiming your Feed-in Tariff payments.

Start your boiler installation process today by finding a local installer.

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