What if it raining, no sun? Solar stuff cannot help.

来源: u92178 于 2008-06-19 11:46:35 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (62 bytes)

My yard has solar lights, when there is no sun, they are dark.

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• 这个俺也考虑过的。 how about groud source heating? -lookatme..- ♀ 给 lookatme.. 发送悄悄话 lookatme.. 的博客首页 (0 bytes) () 06/19/2008 postreply 12:06:30

• But how ground source heating works? I never heard of it. -u92178- ♀ 给 u92178 发送悄悄话 u92178 的博客首页 (395 bytes) () 06/19/2008 postreply 13:07:44

• 有同感，我也觉得用更EFFICIENT的APPLIANCE更省能源。 -katies- ♀ 给 katies 发送悄悄话 (141 bytes) () 06/19/2008 postreply 13:33:45

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