1 thing I don't understand

来源: 用户名被占用了 于 2011-12-21 12:28:05 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (315 bytes)
回答: 出来了出来了 由 coorslight969 于 2011-12-21 12:06:43

The pressure of cold water and hot water are not the exactly same all the time. In my home, hot water has higher pressure than cold, because they come from different sources. If you make a loop from hot to cold circulation, eventually part of cold tube will become warm. It will burn more gas to maintain so.

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• 都是瞎折腾 - 热水里面往往有软水剂，混到冷水里不太好 -mc3361- ♂ 给 mc3361 发送悄悄话 (0 bytes) () 12/21/2011 postreply 12:33:39

• probably for radiator, but not for tap water -用户名被占用了- ♂ 给 用户名被占用了 发送悄悄话 用户名被占用了 的博客首页 (0 bytes) () 12/21/2011 postreply 12:39:49

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