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Posted by Pat S on January 28, 2005 at 13:10:23:
I have read much concerning condensing-type boilers. It seems my application would not benefit from the extra efficiency (thus savings) as I need high temperature hot water and large thermal mass delivery units (cast iron radiators @ 180F). I also would like to add an indirect fired water heater, and most of these are rated using 180 - 200F boiler supply temperatures. From what I have read - the condensing-types need low hot water return temps (< 140 F) in order to utilize this feature effectively. Should I just go with a mid-efficiency, modulating capacity boiler and install an outside air reset - or can the condensing type work with my system?
Also, I would like to know about the use of elastomer gaskets instead of push nipples in boiler design. Are the gaskets less reliable than the nipples- aka leakage problems? Thanks.