Originally Posted By: real80sman
Actually, just the opposite. The thermal expansion & contraction from repeated short heating cycles, causes more wear and aging than fewer, longer, heating cycles. Similar to a car with mostly "highway miles" vs "city miles"


Interesting, and very good to know. I guess that pretty much eliminates all of the arguments for "oversizing" a furnace. Thanks !!

Last edited by bridgman; 09/26/10 10:45 PM.
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