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Posted by HeatPro on January 27, 2009 at 09:36:06:
In Reply to: gsa boiler sizing posted by Bob on January 26, 2009 at 14:28:14:
You can get free estimate software at:
http://www.heatpro.us/documents/E45C7EC752F849A755AAB551A7E7193A77CC3DC4.html
here is why you need them:
http://www.heatpro.us/duct/squareft.htm