1#feinet2001 . V) [" m( {/ o0 |8 N0 L- b8 r1 r1 j8 E. p
option 1: Two seperated furnances and seperated control& ^ P* |2 q5 B- Y
(for big house > 3000 ft) ! F) K2 r& T# n4 ~+ Q2 g! u* Zoption 2: One furnance with Zone Control device & g q7 o" s$ f* f1 x
(three zones or fours zone will be good) - total efficiency will be higher 1 K% x2 }6 G8 z0 d* j# n& L 2 X, W" q* c* S" Z2 k' sTotal cost is not big difference.