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Posted by gilmorrie on October 15, 2009 at 14:03:55:
In Reply to: Re: BTU input -vs- BTU output posted by geo on October 14, 2009 at 21:49:51:
The boiler's burner burns 70K Btu/hr worth of fuel. The boiler puts out 50K Btu/hr of hot water heat for your house. The difference is wasted - it goes up the chimney.
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