How long does it take to fit a new boiler?

install timescales

How long to install a new boiler or a boiler replacement?

how long to fit and replace a boiler

The average time to install a new boiler or a boiler replacement:

  • Combi boiler replacement – 1 day
  • System boiler replacement – 1 day
  • System to combi – 1-2 days
  • Back boiler to system boiler 2 days
  • Back boiler to combi 2 days

Let’s look at each boiler replacement option and new boiler fitting in more detail below:

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One of the most common questions about new boilers is how long it will take to replace or install them. This guide gives you everything you need to know about how long it will take to fit your boiler upgrade.

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What do you need to know about fitting a new boiler?

boiler installation diagram

Firstly, It’s important to note that fitting a new boiler isn’t always a simple like-for-like swap. Additionally, you might need to upgrade a new system, replace an old boiler, or switch to a new combi.

For this reason, the time it will take is dependent on your circumstances. That said, this guide will touch on the average installation times and what you can expect at a minimum.

Additionally, the fastest boiler installation is what’s called a ‘like for like swap’. So, all gas boiler fitting must be done by a Gas Safe registered engineer.

Simply, this refers to those who need to replace their current boiler with the same type of boiler. Be sure that this doesn’t mean the same brand, simply the same type of technology.

Therefore, replacing your current combi boiler in the same location calls for a new, modern boiler. You are in luck.

gas safe installer

A like-for-like swap usually takes a Gas Safe heating engineer a day.

If everything goes to plan without any issues occurring, it should take up to 6 hours at the most to fit your new central heating system.

How long does it take to replace a boiler?

The common answer is usually 1 to 2 days for moving a boiler or replacing a boiler.

But this answer will vary depending on what work is needed, if your boiler is moving location or if you have a like-for-like boiler.

gas engineer

You won’t typically see one replaced in less than a day. While that seems like a lot of time, it’s because boilers are complicated machines and there is a lot of variation when it comes to boiler types.

Sometimes you may need to move additional pipework or a boiler flue, and all of these tasks take time.

If your boiler was previously leaking water, then you may need some work to repair flooring or areas where water may have dripped on. 

Boilers such as the Megaflo unvented range takes longer to install as many of these installations are new installs. These can take 1 to 3 days dependent on the size of the boiler and home. 

It will often take quite a while however, if you have a combi boiler, then you will benefit from a much shorter installation time.

So, let’s change the question for a moment how long does it take to fit a new boiler if it’s a combi unit?

How long does it take to install a new combi boiler?

Not to mention, combination boilers, or combi boilers, are hybrid devices that serve as high-efficiency water heaters and a central heating system.

These are the most fitted, modern boilers throughout the UK. Combi boilers benefit from much shorter installations on average.

In comparison to more “traditional” conventional boilers, a combi boiler can usually be installed in 4 – 6 hours.

Moreover, these are usually only useful if you’re replacing an existing combi boiler and want it installed in the same location. Find out what a conventional boiler is here. 

If you are getting a combi installed but currently have an older boiler, such as a traditional back boiler, then installation will take longer.

If you want to relocate the boiler, such as from one room to another, the installation will take longer.

The location is very important when it comes to boiler installation so let’s take a more detailed look at it.

When considering how long it will take to move and fit new boiler, the location will be very important to any engineer’s or surveyor’s estimate.

How long does it take to move a boiler?

If you want the boiler to be kept in the same location, then installation will almost always be quicker, unless the engineer runs into an unexpected problem that is.

However, how long to install or move a boiler will be a much longer job.

Whereas, moving a boiler to a new location will usually require the engineer to change the existing pipework and maybe even install new pipes as well.

This as I am sure you can guess, will add some extra time to your boiler installation.

How much longer this will take can once again can vary quite considerably depending on where you want the boiler moving to.

But on average you can expect it to add half a day to a full day of extra time to your boiler installation.

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How long does it take to remove and install a boiler?

Not only, is the removing and installation process of a boiler is all included in boiler replacement, as removing the old boiler doesn’t take that long. Most boilers are just hung on a wall using a large bracket that can take the weight of the required boiler. If you remove a boiler and the brackets, you will receive a new one with your replacement boiler.

Once the old boiler is removed as the first job, the rest of the job will be installing the new one which as we have said can take from 1-2 days depending on the work involved.

How long does it take to upgrade a boiler?
a rated boiler replacement

Finally, the other main thing that can impact your installation timeframe is whether you are getting a system upgrade or not.

If you’ve never heard the term system upgrade before then don’t worry. It means you are changing the type of boiler.

As previously stated, replacing an older conventional boiler with a new combi boiler will most likely take two days.

However, if you already have a combi boiler and are replacing it with a conventional boiler then installation could take even longer.

The Installation can take around 3 – 4 days in some cases.

combi boiler how long to install

So within a few hours, you can be controlling your heating and room temperature with your phone or tablet if it is a combi swap. But if it’s a bigger job, it could be longer depending on your current boiler system.

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How long for a new boiler fitting time guide

New combi boiler swap1 day
New Combi boiler swap and relocation1-2 days
System to new combi conversion1-2 days
New system boiler1 day
New system boiler with relocation1-2 days
New regular boiler swap1 day
Regular boiler swap with relocation1-2 days
Regular boiler to combi boiler conversion1-2 days

Summary of boiler installation times:

As illustrated, there are many different answers to the question of how long it takes to install and fit a new boiler. Because in most cases, you can expect around 1 day on average. At most, it usually takes 2 days.

If you are doing the like-for-like and swapping to the best combi boiler, you can expect your installation to be quick, often within a few hours. So the rest of the time spent after the actual fitting of the boiler will be safety checks by the Gas Safe registered engineer.

What about a boiler service, how long does it take?

Another commonly asked question is, how long does it take to service a boiler? Boiler services should happen annually to keep your warranty valid and usually takes around 1 to 2 hours and you can expect boiler service costs to be around £100.

Additionally, if you are looking for a new boiler, get a fixed boiler price online now.

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