Setting the right budget

How much should you expect to pay?

We know it's difficult to estimate how much a project will cost, that's why we've surveyed our tradesmen to give you an idea of how much you should expect to pay for specific jobs. Tradesmen all across the country have contributed to the cost guides, so the costs you see are an approximate national average.

System boiler

Cost estimates for a new boiler (dependent on your current boiler system)

If you currently have no boiler installed:

New Boiler Low High
System boiler £2,500 £3,500

If you currently have a combination boiler installed:

New Boiler Low High
System boiler £2,200 £3,200

If you currently have a regular or conventional boiler installed:

New Boiler Low High
System boiler £1,300 £2,300

If you currently have a system boiler installed:

New Boiler Low High
System boiler £1,300 £2,300

A system boiler is a variation of the conventional boiler and can be confused with this more common type of boiler, so do ask your plumber or heating professional about which system you have if you are in any doubt. Your engineer should come to look at your old boiler and measure up for the job anyway, so this is the time to ask questions or advice on boiler types.

The main difference with the system boiler is that it heats water straight from the water supply, rather than relying on a cold water tank feed from your loft. This makes for more efficient hot water supply and also does away with the need for installation and maintenance of a cold water tank. For this reason, the installation of a system boiler can cost slightly less in terms of labour costs.

Your engineer should be able to provide you with a price comparison and a list of the advantages or disadvantages of all the systems on offer, so that you can choose the right one for you. If you are changing from another type of boiler then there may be additional costs for installation and pipework as well as for remedial work to patch up where a previous boiler may have been situated.

The installation of your system boiler

Once you have agreed on a boiler type and price for the job then your engineer will call to remove your old boiler and install the new one. You can expect the whole job to take most of the day, or possibly even longer. So do expect to be without water for much of the day.

Your heating professional will install your system boiler and connect it to the water, gas and heating before testing the whole set up to make sure that it works correctly. They should leave the house tidy once the job is complete, as well as giving you some basic instruction on how the new boiler works.

Pros and cons of a system boiler

  • You can get hot water from multiple taps at the same time.
  • Ideal if you have multiple bathrooms.
Rated People surveyed 65 of our registered plumbers and heating engineers across the country to give you an idea of the approximate cost of installing a new boiler, materials included.

Please note these prices are average and are offered as guidance only, to help you budget when posting a job on Rated People. For a free quote tailored to your specific requirements, please contact our local heating engineers.


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