1#feinet2001 . p5 U9 u* u* c3 Q" p % n5 d5 x1 W' D0 ~6 ]& z+ n" Coption 1: Two seperated furnances and seperated control 0 K, K- G6 M* D {* }0 F- ? (for big house > 3000 ft)6 P1 Q, l& B9 i
option 2: One furnance with Zone Control device " N# M) a _1 w) L7 b% Z7 V (three zones or fours zone will be good) - total efficiency will be higher& p. ^" E- ` V4 G& _# a- B" W* [: c
3 J# l) L1 m/ @& N+ [* e) ~$ sTotal cost is not big difference.