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First wall-hung micro-CHP unit due this year

Posted by Cathy Debenham on 12 March 2009 at 10:58 am

With approval from British Gas under its belt, the Baxi Ecogen micro-CHP boiler will hit the domestic market later this year. It will be the first wall-hung combined heat and power unit available in the UK.

Like the boiler that it is likely to replace, Ecogen will use gas to heat your water and radiators. It looks similar, and takes up the same amount of space. However, it has a generator that also produces electricity which you can use in your house, or export to the grid.

A free piston stirling engine generates heat and electricity by driving a magnetic piston up and down between a generator coil. While generating 6kW of heat it also produces 1kW of electricity. The result is a significant (sorry, I can't be more specific than that - it's Baxi's word) reduction in energy bills - although that will be balanced by a higher initial cost.

Baxi's field trials indicate that use of Ecogen will cut household carbon emissions by 1.5 to 2 tonnes of carbon dioxide. Of course, CHP is not a renewable energy, it still uses a fossil fuel. But we have included it on YouGen as it is a way of lowering carbon used in the home.

To find out more about how it works, you can watch a video (you may want to start at one minute to avoid being lectured about climate change with yet more pictures of melting ice caps and polar bears).

Ecogen will be available through the British Gas network of installers later this year (although new builders will be able to go direct to Baxi). Baxi can't confirm when, or exactly how they will be supplied. It is lobbying for it to be included in any feed in tariff that the government introduces, and for for grants to be available, but at the moment it's watch this space. You can, however, register your interest now, you might also win an energy efficiency home make over.


If you have a question about anything in the above blog, please ask it in the comments section below.

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2 comments - read them below or add one

Cathy Debenham

Cathy DebenhamComment left on: 9 June 2009 at 2:39 pm

Hi Kayrad

I spoke with the Baxi press officer at EcoBuild earlier this year, and couldn't get any detail on how much it's going to cost or on when it's going to arrive (even when I invited information as vague as summer or autumn). And I haven't seen anything that helps make it any clearer in the three months since. Both Baxi and British Gas are still inviting people to register their interest. Sorry not to be more help, but as soon as we hear more we'll write about it here, so if you sign up to RSS feeds you won't miss out.


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kayradComment left on: 8 June 2009 at 12:20 pm

Hi - any indications of how much these will cost and what the "higher initial cost will be" - i.e. what the premium above a normal combination condensing boiler will be

- I'm in the market for two new boilers in the next six months or so in my home renovation project and my rented out flat. I've already selected a Baxi combination condensing boiler as my preferred option so would like to know if the cost of the new chp Ecogen boilers is going to be so prohibitive that I shouldn't bother to wait for them to hit the market...

thanks in advance to any replie, kayrad

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