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How Much Does a Gas Boiler Replacement Cost?

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Gas boiler with tool box

The cost of replacing a gas boiler is between €2,000 and €3,000 including installation. The exact price will depend on the type of gas boiler you are installing and individual labour costs. It is recommended to replace your boiler after 15 years as its efficiency will begin to reduce, leading to higher energy costs. Servicing your gas boiler each year can help to extend its lifespan and maintain its efficiency.

How Much Is a Gas Boiler Replacement?

The cost of replacing your gas or combi gas boiler is around €2,000 to €3,000. There are several factors that will influence the final cost, including:

  • New boiler
  • Labour
  • Assessments

Given the factors that influence the final cost, we recommend getting two or three separate quotes before making a final decision on the price you are going to pay. This way you can try and find the best price that suits your budget.

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Selectra's Gas Boiler Replacement Tip

"Make sure that the technician who carries out the installation is an RGII registered gas installer to ensure that the work is carried out to a high standard of both safety and service."

When Should I Get a Gas Boiler Replacement?

Boilers normally need replacing after about 10 to 15 years.

Most gas boilers will continue to work perfectly for years, but will eventually start deteriorating after a while. There are some clear signs to watch out for when it comes to knowing when to replace your gas boiler:

  1. Boiler Age
    Gas boilers will typically last between 10–15 years. If your gas boiler is approaching this age and starting to break down, it might be time to look into a gas boiler replacement.
  2. Inconsistent Heating and Hot Water
    If you’re getting inconsistent hot water from the tap, like if it’s running cold and then hot again, it could be down to wear and tear and needing a replacement.
  3. Strange Noises
    If your boiler is constantly making banging or clanging noises, you should have it checked out immediately. Your plumber will be able to determine if you need a gas boiler replacement.
  4. Major Leaks
    If you’re having constant leaks and water is dripping from the boiler, it might need to be replaced if the parts can’t be found for it.
  5. Yellow Flame Instead of Blue
    A yellow or orange flame instead of a crisp blue flame can indicate incomplete combustion. This is a serious problem that can produce carbon monoxide, so you should get it replaced as soon as possible.
  6. Increased Energy Bills
    Since gas boilers become less efficient with age, it might lead to your energy bills increasing. This can happen when your gas boilers need to try harder to reach the same performance and so add to your home heating bills.

Is It Better to Service or Replace My Gas Boiler?

Given the cost of a new boiler, you might want to consider servicing your boiler, especially if it isn’t that old or only a couple of issues that could be fixed by bleeding your boiler. Servicing a gas boiler will cost roughly €130.

How Do I Get a Gas Boiler Replacement?

If you’re certain that your gas boiler is broken and needs replacement, you should definitely look into getting it done as soon as possible. 

Getting a replacement can take a bit of time, however, so you should follow these steps to get it done in a straightforward way:

1

Details About Your Current Boiler
Make sure you know what type of boiler you have and how long you’ve had it. This will help a gas boiler company or engineer understand your needs.

2

Quotes
Shop around for different boiler quotes and find out how much it will cost to replace. In some instances, if you have boiler insurance or cover, you might be able to get a discount on the cost of a new boiler.

3

Assessment
You’ll need to get an assessment from a gas registered engineer to get an idea of what you need and what your property may require when it comes to your heating. The engineer will usually be from the same company as your boiler cover.

4

Installation
Once you’ve decided on the quote, you will need to get it installed. This must be done by a Registered Gas Installer (RGI) as you cannot install your own boiler. After installations, your engineer will double-check to see if everything’s in good working order.

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How Efficient Is My Gas Boiler?

To know how efficient your gas boiler compare to others such as electric, condensing or biomass boilers, you first need to look at its energy efficiency rating. 

You can find these labels on various energy appliances in your home. Here is what these labels mean:

  • A rating - Your gas boiler works at 90% efficiency or more.
  • B rating - Your gas boiler functions between 86-90% efficiency.
  • C rating - Your gas boiler runs between 82-86% efficiency.
  • D rating - Your gas boiler performs at 78-82% efficiency.
  • E rating - Your gas boiler operates at 74-78% efficiency.
  • F rating - Your gas boiler runs between 70-74% efficiency.

An inefficient gas boiler will use more units of gas than necessary to heat your home and water.

Using Ireland's average gas usage for a three-bedroom house, the yearly gas cost is approximately €1,403 including VAT. An inefficient gas boiler, therefore, costs you the following:

 
Boiler Efficiency to Cost Comparison

Gas boiler efficiency rating

Extra gas cost per year

Estimated time required to pay off a new boiler

B rating - 86-90%

€55

N/A

C rating - 82-86%

€112

30 years

D rating - 78-82%

€168

20 years

E rating - 74-78%

€225

15 years

F rating - 70-74%

€280

12 years

G rating - under 70%

€420

8 years

How Long Does a Gas Boiler Replacement Take?

A gas boiler replacement usually takes between 2 and 3 hours. Depending on the complexity of your gas boiler installation, it may take multiple hours to get your gas boiler installed.

Are There Gas Boiler Replacement Grants?

No, there are no direct gas boiler grants or SEAI grants for any type of boiler available in Ireland.

The government is aiming to phase gas and oil boilers out of the market by 2025 due to our Paris Agreement commitments. However, there are some other options you can take advantage of when trying to boost the heating efficiency of your home.

Despite this, there are alternative heating grants available from the SEAI for:

  1. Heat pump systems.
  2. Solar water heating systems.
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