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Condensing boilers
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Doctor Drivel
Posts: n/a
"Dave Plowman (News)" througha haze of senile
flatulence wrote in message ...
In article s.net,
Doctor Drivel wrote:
So if efficiency of a 25 year old boiler was about 70%,
More like 55%.
More numbers
Yes 55 is a number.
snip senile drivel
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