USSC 1537G Owner's Manual page 20

PLENUM
COLLECTOR BOX
COLD AIR
RETURN
FILTER BOX
PLENUM ELBOW
COLD AIR
RETURN
PLENUM TOP
(OPTIONAL)
FILTER BOX
INSTALLATION B
(U.S. ONLY)
SOLID FUEL
FURNACE
INSTALLATION C
(U.S. ONLY)
SOLID FUEL
FURNACE
20
TO EXISTING
DUCT WORK
WARM AIR
EXISTING
FURNACE
TO EXISTING
DUCT WORK
WARM AIR
EXISTING
FURNACE