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Posted by rbeck on December 13, 2007 at 14:14:42:
In Reply to: Re: steam boiler sizing posted by HeatPro on December 12, 2007 at 09:52:05:
Do not add the 33% for piping at all. The manufacturers already have deducted the 33% today. Also do not convert to btu's. Maybe this is where this is getting confusing. The brochur states a sq ft heating figure. This is for connected load. 33% of what the boiler can produce is removed before that figure hits the printer. Sometimes I am asked how much to add for uninulated mains. I also state nothing. You must insulate the mains. That is a 212 btu per ft loss in 2" pipe, not to mention the latent heat loss.