i see. thanks. how much does it cost (material and labor )? of

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• if labor is 200-300 per day, it could be about $1250-1750.估计我人工算 -3apples- ♀ (118 bytes) () 02/12/2015 postreply 14:24:24

• Well, you save hundreds of heating bill every year. -borisg- ♀ (0 bytes) () 02/12/2015 postreply 14:26:27

• 是的，投资不大，但是很值得。 -3apples- ♀ (0 bytes) () 02/12/2015 postreply 14:51:50