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Posted by Gerry on November 08, 2003 at 07:08:22:
The plant I work in is about 100 years old. The current boilers have been there for about 25 years. In the old part of the building, above the boilers are two dormers that are open to the atmosphere allowing fresh air to come in and/or heat to escape. Is there any need to duct in combustion air according to the current ASME standard of X# sq in per Btu in to the boiler? I could understand doing when and if the boilers ever get replaced... but...
Also curious about warm to hot combustion air verses cool - which is better? Seems like you might want the boiler room a little warm to increase efficiency if nothing else.