check this out

来源: RomaVacation 于 2023-10-10 19:33:37 [] [旧帖] [给我悄悄话] 阅读数 : (414 bytes)

https://accessheating.com/furnace-efficiency-guide-with-comparison-diagram/

Rental: I would not worry about it since I don't pay for utilities. Almost no tenant pay attention to furnace efficiency

 

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