1#feinet2001 % R( j0 g+ S) W: { + P+ ^+ b- C* @ doption 1: Two seperated furnances and seperated control# w7 f. Y0 j" ]8 }: ^: V: `- ?
(for big house > 3000 ft) ) S$ Z I/ ? r. y7 Eoption 2: One furnance with Zone Control device ' V5 E' f$ o3 g, ^3 {2 v! z
(three zones or fours zone will be good) - total efficiency will be higher9 h3 u0 U. y3 p! \
4 K$ K H0 T+ A! U" s o7 P
Total cost is not big difference.