1#feinet2001 ) Y, y7 i: d: W1 C, a ) d8 l% v1 R2 t5 ^. a/ A8 d( ioption 1: Two seperated furnances and seperated control 4 B a/ i+ u4 O+ W (for big house > 3000 ft)6 m) l% b. a# `/ x' b- d W! `
option 2: One furnance with Zone Control device ( H3 R) U) B" n8 s
(three zones or fours zone will be good) - total efficiency will be higher ( K/ h2 s2 N" m% c8 A4 C. c, A6 `% }- f" j2 W; c) A
Total cost is not big difference.