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Posted by HeatPro on November 29, 2007 at 12:52:54:
In Reply to: Riello F3 40 series burner posted by Peter Hamilton on November 29, 2007 at 12:06:35:
If you are providing combustion for a steam system (a reasonable assumption for a steam forum, though not necessarily the fact) then you would total up the radiation output in the building and add 50% to that. If the required btuh of the burner can provide that, it is what you need.
http://www.heatpro.us/steamtree/documents/13DCC0F93CE9CBF05551C0B19B792902A9F2BE46.html