Installing a boiler can be a complex process, and the amount of time it takes can vary depending on several factors. On average, it takes anywhere from half a day to a full day to install a new boiler, but it can up to three days.

Replacing a combi boiler in the exact same spot as the previous boiler is a relatively easy and smooth process for a qualified professional. Assuming everything goes smoothly, the combi boiler replacement should take between four and six hours.

Here are some of the factors that can impact the installation time:

Type of boiler: Different types of boilers can take varying amounts of time to install. For example, a combi boiler, which provides both heating and hot water, can typically be installed more quickly than a conventional boiler.

Location of the boiler: The location of the boiler can also impact the installation time. If the new boiler needs to be installed in a different location than the old one, this can add time to the installation process.

Accessibility: The accessibility of the installation site can also impact the amount of time it takes to install a new boiler. For example, if the installation site is in a cramped basement or attic, the installation may take longer.

Experience of the installer: The experience and skill level of the installer can also play a role in the installation time. An experienced installer will typically be able to install a new boiler more quickly than someone who is less experienced.

Installing a smart thermostat

Smart technology is in most people’s houses nowadays. Smart thermostats are a great way of reducing energy costs and simplifying the use of your central heating system.

Many companies now offer a smart thermostat installation alongside your new boiler, but this does also add to the installation time. It doesn’t take long, but it still adds cost and labour.

It is important to choose an experienced installer to ensure that the installation is done correctly and efficiently.

It’s quick and easy to get a quote for a boiler replacement with KDE. Just speak to a member of our team on 01928 711444 and we’ll take care of the rest. You can also email us via

Interest free payment options are available.

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