1#feinet2001 ( ?5 Z. d# n2 c6 P. O; w. A6 I : s3 a; ]4 r8 poption 1: Two seperated furnances and seperated control : V4 L2 n' l7 j (for big house > 3000 ft)9 |- _8 R; h) B& t! T$ s9 y$ f
option 2: One furnance with Zone Control device y1 T, |1 v2 R. ]' l (three zones or fours zone will be good) - total efficiency will be higher: V2 g9 V5 e5 I. k6 q1 r' h
) H3 y' ^' x# s ]! d
Total cost is not big difference.