Don't believe "they", just because they are...."they". You know what I mean.
If that's too freaking much information;
http://www.google.com/webhp?hl=en ...and ask away.
With the NEW guideline from GAMA, AGA and UL the calculations come up with
different numbers TODAY
In the OLD days when gas was flowing like free beer there was no need to get
tight with numbers, now days there is
I hope this clears it all up for you.
Now buy a frickin SHE boiler and get on with life.
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