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Thread: Boiler AFUE during Summer DHW
02-26-2005, 09:44 AM #1
I'm trying to complete some energy calcs to convince myself to go hydronic plus separate AC vs. FHA and AC. But one "deal killer" occured to me.
Assuming an 84% AFUE gas boiler, what will the REAL AFUE be during June-September when I am only needing abuit 2.5M BTU input to make DHW? This is for a 50MBH IBR gas boiler. Any ideas? Seems that the summertime AFUE is going to be kinda low comparted to a chinzy standard tank.