1#feinet2001 + M1 w0 p4 |8 r- p% ?- f0 |0 I6 o% W
option 1: Two seperated furnances and seperated control0 _) ?% I9 Q# r; a: J" z- U% {/ ~
(for big house > 3000 ft) 8 k# F( U: H2 X+ z" V5 Moption 2: One furnance with Zone Control device . g& ^: J6 N0 t( w0 i( P3 j* J (three zones or fours zone will be good) - total efficiency will be higher; a- b8 d. Y* D6 V1 V8 t
8 K6 j- Y! [* C6 `2 LTotal cost is not big difference.