September 21, 2023

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Step-by-Step Guide to Boiler Installation in London

The centre of your house is your boiler, which does everything from keeping it warm in the winter to cleaning your dishes and taking your hot bath at the end of a long day. Because of this, a boiler malfunction can cause disruption and annoyance in your day-to-day activities.

Making sure you have a dependable boiler and a skilled installation for your house requires selecting the finest model and a reputable contractor.

As contractors might differ in price and diagnosis, we advise contacting at least two or three installers to visit your house and discuss your heat and hot water needs.

They will talk to you about whether a straightforward new boiler is necessary or whether there is a better option.

The control systems that are accessible to you will also be explained by your boiler installation services providers, who will then propose one depending on the characteristics you value and any optional features like smart functionality, weather compensation, or load compensation.

Guide for Boiler Installation Services in London

  • The day of boiler installation service

Depending on how extensive the installation is, it normally takes 1-3 days to finish. However, the majority of uncomplicated like-for-like exchanges may be completed in a single day

Then, based on your needs, the installation procedure and time vary.

Some of the actions your installer could do to install your new boiler.

  • Removing the outdated boiler

The normal first step for installers is to remove the existing boiler. Again, the intricacy of the task and the current technology determine how long it takes.

  • Flush/Clean

British Standards dictate that the installer should clean or flush your system. Depending on the state of the system, a chemical flush could be adequate or a power flush could be necessary. In particular, when installing a new boiler, it’s critical to maintain the cleanest system water possible. Your new boiler will be protected from any potential harm by a system cleanse before installation.

  • Changes/upgrades to the piping

Your pipes may need to be upgraded or changed to accommodate your new boiler. Pipework installation might take up a significant amount of the installer’s time because it is not always an easy task.

  • Installation of the boiler

Your new boiler will be installed either where your old boiler was or in a new place by the installer. Although you may relocate your furnace, doing so will cost you more time and money. It’s crucial to pay attention to the installers’ advice.

  • Accessories

In accordance with recommended British Standards practice, technician should suggest installing a system filter with your new boiler. The installation will also clean the gas boiler with cleaning first, followed by such inhibitors to prevent corrosion in order to avoid this from happening. A system filter is meant to safeguard your gas boiler from every waste or sludge that may accumulate over time.

  • Activation of the system

Your installer will activate the system to make sure everything is operating as it should when your new boiler has been completely fitted and the necessary pipework is finished.

  • Handover

Ensure your installer gives you a handover after the job is finished so you are as aware as possible, understand how to use the controls and operate the boiler, as well as some basic maintenance inspections you may need to perform over the boiler’s lifetime, such as topping off the system pressure and bleeding a heater.

  • Registration

To ensure that the boiler’s warranty is still in effect and that you are protected in the unfortunate event that you encounter any problems, either the owner or installer must register your boiler with the gas boiler manufacturer.


Embrace your cozy house! You may use the heating and hot waters whenever you need it when your technician has finished and handed over all of his or her work.


Boiler Servicing must be performed annually to preserve the warranty.