What if it raining, no sun? Solar stuff cannot help.
所有跟帖:
• 这个俺也考虑过的。 how about groud source heating? -lookatme..- ♀ (0 bytes) () 06/19/2008 postreply 12:06:30
• But how ground source heating works? I never heard of it. -u92178- ♀ (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- ♀ (141 bytes) () 06/19/2008 postreply 13:33:45