check this out

來源: RomaVacation 於 2023-10-10 19:33:37 [] [舊帖] [給我悄悄話] 本文已被閱讀： 次 (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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