气的与电的有点不同,同一产品多付的是warranty。这篇可供参考 - Link

来源: 2019-10-16 22:14:32 [旧帖] [给我悄悄话] 本文已被阅读:

https://www.biggerpockets.com/forums/84/topics/501710-6-vs-9-vs-12-year-water-heaters-which-is-best