12
PLENUM
OPENING
C
A
B
D
FLOOR
OPENING
A96283
Fig. 11 -- Floor and Plenum Opening Dimensions
DOWNFLOW
SUBBASE
SHEET METAL
PLENUM
FLOOR
OPENING
FURNACE
(OR COIL CASING
WHEN USED)
COMBUSTIBLE
FLOORING
A96285
Fig. 12 -- Furnace, Plenum, and Subbase Installed on a
Combustible Floor
APPROVED
COIL ASSEMBLY
OR
COIL BOX
FURNACE
SHEET METAL
PLENUM
FLOOR
OPENING
COMBUSTIBLE
FLOORING
A08556
Fig. 13 -- Furnace, Plenum, and Coil Assembly or
Coil Box Installed on a Combustible Floor
58D
L