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John Rumm
 
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Default Vaillant Ecotec 837 or WB Greenstar 35CDI combi ??

lid wrote:

Gas pipe will have to be replaced anyway its 15mm and about 25metre
run at present.


If memory serves, I calculated a max effective length for 22mm pipe
feeding a 35kW boiler at only 12m. So as Ed said, "bigger"!

(Personally I would not go for less than 35kW - I find even that is only
_just_ good enough)

--
Cheers,

John.

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