How Much Does it Cost to Power Flush a Central Heating System?

Cost Summary of Power Flushing Central Heating
Price Range = £300
Average Cost = £1,788.16
Cheapest Price = £1,201.04

Related Guides: Central Heating Cost Guide, Central Heating Power Flushing Guide


Central Heating Power FlushingAre you finding that most of your radiators remain cold (or lukewarm at best), despite continually turning up the thermostat? Or are they taking too long to heat up to maximum capacity? Or do some only heat up in some places, and not others? If any of these are the case then you might find that you have a clogged up central heating system. This occurs over a long period of time, as sludge and sediment gradually starts to accumulate in both the pipes and radiators, until the blockage prevents your heating panels from warming up properly; the boiler lacks the power to pump the heat through the level of waste and scale that’s gathered together, and as a result the poor circulation of your heating system leaves you and your family craving the warmth that, although it isn’t there, you’re ultimately still paying for.

So what’s the best solution? Well, the best thing to do is call in a professional heating surveyor or gas inspector to first of all assess the damage and locate the major sources of the problem. If it is simply a case of a blocked heating system, then they will most likely recommend that you power flush your central heating system. This involves hiring a professional, fully qualified engineer to clean the system by essentially ‘flushing’ out all of the built-up dirt and sludge from each outlet and/or clogged pipe, using the most effective tools and fast-working chemical solutions. But how much does flushing a central heating system cost?

Central Heating Power Flush Cost

According to¸ the final central heating flushing cost usually depends on the size of the home; more specifically, the number of radiators in your home affected by the faulty system. Under their guidelines the cost of flushing central heating system works out as the following:

  • £300 for up to 10 radiators (usually around a three-bedroom semi-detached property)
  • An additional £35 for anything between 11-15 radiators (in total)
  • An additional £25 per radiator after that (up to a maximum of 20 radiators/outlets).

You might think this sounds a little expensive for what is basically a ‘clean’ of your system, but power flushing central heating system costs can be ‘recouped’ in reduced energy bills, less wasted heat and the time and money you save on potential follow-up repairs that, when you leave a clogged system unattended, could escalate into a major system overhaul. Therefore it is always advised that you pay the up-front power flush central heating cost by budgeting carefully and comparing a number of different quotes from several companies; some even offer a free follow-up check, so be mindful of looking out for deals that could save you even more cash! Either way, power-flushing your central heating system will certainly seem worth the worry when you can relax in the warm, cosy comfort of your own home again.

*Source: Prices are accurate as of October 2012

Bill Meldon says:

Asked you for quotes for external wall insulation & am still waiting have heared nothing

ablyth says:

Hi Bill, I have forwarded your comments to our customer care team.

Mohammad Asim Khan says:

Hello, I have a four bedroom house with a total of 8 radiators in total. New central heating system was installed only five years ago and as we understand the system was power flushed. WE experienced the breakdown of the system most recently. As a consequence, the British Gas engineer was called upon who found that the water pump failed to work due to accumulation of sludge and sediments in the system. Hence power flushing is advised at a cost of……I would like your quotes and what guarantee you offer. Thanks

mjackson says:

Hello Mohammad,

Thanks for your post.

As a rough guide – it would cost approximately £300 for up to 10 radiators (usually around a three-bedroom semi-detached property) with an additional £35 for anything between 11-15 radiators (in total) and an additional £25 per radiator after that (up to a maximum of 20 radiators/outlets).

In order to receive official quotes from local contractors, you would need to fill in our online plumbers form.

Once received , we will aim to match your details with up to 4 local plumbers who will each contact you in order to arrange the quotes.

We advise taking a look at our consumer terms of use which will explain our service in more detail.

We hope to be of assistance in the future.

Mark @ ServiceMagic

Christine Morse says:

We have just had a quote of £365.00 plus VAT for a central heating system in a mobile home consisting of 4 small radiators plus one very tiny one in the bathroom, how much would you charge as this seems to be an exorbitant price.
(Sorry, this is for the system to be flushed and inhibitor added).

mjackson says:

Hi Christine,

The best way of checking whether you have a competitive price would be to contact other companies that can carry out this type of work and compare their quotes to what you already have.

It would cost approx £300 + VAT to have a power flush on 10 radiators therefore, in my humble opinion, the price you have received does seem quite high considering it’s for 4 radiators in a mobile home.

I hope that this helps.

Mark @ Servicemagic

abraham tolossa says:

Pleas send model no.carna 905 heating power price list

mjackson says:

Hi Abraham,

We wouldn’t be able to provide a price list as we match you with the contractors who will provide the quotes.
Please feel free to fill in our online request form and we will aim to match you with up to 4 local contractors who will call you in order to arrange a convenient time for them to visit you and provide you with a free quote.

alana hosie says:

Hi ive signed up with british gas homecare plan who have quoted me £719.00 for powerflush and pump.Do i have to go with them as im a customer i feel its really expensive.My fear is if something goes wrong after i get someone else to do it then would british gad refuse to fix any probs i may have in the near future.

mjackson says:

Hi Alana,

Thanks for your post.

We suggest that you contact British gas in order to discuss your concerns.
They should be able to answer all of your questions.

mike says:

When doing a power flush, what are the chances of leaks occurring in the system, in particular when some of the radiators are looking a little rusty on the bottom seals.
Also do you recommend the installation of a magnetic filter after the flushing or is it unnecessary if an inhibitor is applied

mjackson says:

Hi Mike,

Thanks for your post.

As we aren’t plumbers, it would be hard for us to advise.

The best thing to do would be to contact a local plumber who will be able to advise.

Thanks again

hollie welch says:

I’ve been told by my home boiler brake down cover I need a system flush. How do I book it in?

mjackson says:

Hi Hollie,

Thanks for your post.

Please feel free to fill in our online request form and we will aim to match you with up to 4 local contractors who will call you in order to arrange a convenient time for them to visit you and provide you with a free quote you can then book someone to carry out the work.

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