How long does it take to replace a boiler?

Depending on how well they’ve been maintained and how much they have been used, Worcester Bosch boilers tend to have a lifespan of 10 to 15 years. For more information on this topic, read our article on how long does a boiler last? 

If you buy a new boiler from us, all the necessary installation is included in the price you pay for the boiler. This means your price will include any new pipework and filters needed, as well as removing your old boiler. We also offer a free chemical cleanse of your new gas boiler to maximise its efficiency.

You don’t have to pay for it all in one go. We offer flexible finance options - you can pay monthly, interest-free*. Read our guide about how you can benefit from boilers on finance.

When it comes to how fast you can get an engineer to come and replace your boiler, it can be from as little as 48 hours¹, depending on engineer availability. The boiler replacement itself can be just a few hours, but it depends on the complexity of your situation. 

Like-for-like replacements are fastest because all water and gas pipes should already be there so it can take from as little as 48 hours¹ from arranging the installation. If you have a combi boiler it can usually be done within a day. 

If you want to switch your boiler type because your needs have changed, installation time may go up by 1-2 days. For example, adding an extra bathroom could mean your current combi doesn’t provide enough hot water to multiple taps at once. In this case, you might think about switching to a system boiler and need a hot water cylinder installed in your airing cupboard.

If you're changing where your boiler is in your home, it will add 1-2 days to your boiler installation. This is because engineers have to re-route the pipework to the new location. If you're moving it to another floor, it can also involve raising floorboard, laying new power and thermostat cables and drilling through walls for the flue. 

If you’ve had your boiler for a long time your next one might need modern heating controls installed for it to work. This should only add an hour to the installation time and it'll give you greater control of your heating. Smart thermostats let you control your heating from an app, so you can automatically turn your heating off when there's no one at home and track your usage, saving you money on your monthly bills and helping you to be more eco-friendly.

Older boilers might also only have 15 mm pipework while many new boilers require 22mm so you might need new pipework. If the distance from your boiler to the meter is significant, floorboards may have to be lifted to lay the new pipe which can take some time to complete.

Demand for boiler replacements goes up during colder months and slows down during summer, so it may take a bit longer to book an engineer in the winter. Where you live may also impact when you're able to get an engineer to visit your home; if you’re in a remote location you may have access to fewer engineers.