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option 1: Two seperated furnances and seperated control: \& V! G' B# l0 J$ m( }! G; z+ Y9 G
(for big house > 3000 ft) * M/ |& z8 }, G+ u% p9 ]option 2: One furnance with Zone Control device $ G2 k% q1 Y7 [1 ^+ D' a (three zones or fours zone will be good) - total efficiency will be higher- F$ j X. W# u+ U& E
" H4 x$ Y4 |" g* S# GTotal cost is not big difference.
Zone Control device, 会不会象他们说的,互相影响呢? 如果房子盖好后,再自行安装,容易实现吗?0 A2 f' R' J- b
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, F7 a% |% b; O* toption 1: Two seperated furnances and seperated control" q, C k+ n J ]% H, h
(for big house > 3000 ft) % l1 b4 Y4 m, G; Koption 2: One furnance with Zone Control device ; X8 w3 P0 ~- q0 n ^ (three zone ... 0 E+ }0 X% x6 p( `十年移民路_ 发表于 2011-3-29 06:36 [/quote]