 鲜花( 19)  鸡蛋( 0)
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1# feinet2001
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& k/ v" f) N/ z) ~option 1: Two seperated furnances and seperated control, k# O, ?, U$ E* P& `, I5 S
(for big house > 3000 ft)
' X& E7 n7 g, }$ \: j( o" aoption 2: One furnance with Zone Control device , d* q+ X P* d k: K, n$ x
(three zones or fours zone will be good) - total efficiency will be higher [/ ^7 _) E( b# p D
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Total cost is not big difference. |
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