USSC 1537G Owner's Manual page 21

2" MINIMUM
CLEARANCE
ANTI-BACKDRAFT
FLAPPER
SOLID FUEL
FURNACE
2" MINIMUM
CLEARANCE
SOLID FUEL
FURNACE
INSTALLATION D
(U.S. ONLY)
DUCT
WORK
COLD AIR
RETURN
INSTALLATION E
(U.S. ONLY)
DUCT
WORK
COLD AIR
RETURN
21
11 PCS
(OPTIONAL PLENUM
FAN CONTROL LOCATION)
FURNACE PLENUM
EXISTING FURNACE
BAFFLE
FURNACE PLENUM
EXISTING FURNACE