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Figure 12 − Furnace, Plenum, and Subbase Installed on a
Combustible Floor
FURNACE
(OR COIL CASING
WHEN USED)
COMBUSTIBLE
FLOORING
DOWNFLOW
SUBBASE
SHEET METAL
PLENUM
FLOOR
OPENING
FURNACE
CASING
WIDTH
IN. (mm)
Upflow Applications on Combustible or Noncombustible
Downflow Applications on Noncombustible Flooring
14–3/16
(360)
Downflow applications on Combustible Flooring
Downflow Applications on Combustible Flooring with Coil
END4X, ENW4X or Coil Casing NAEA (subbase not required)
Upflow Applications on Combustible or Noncombustible
Downflow Applications on Noncombustible Flooring
17–1/2
(445)
Downflow Applications on Combustible Flooring
Downflow Applications on Combustible Flooring with Coil
END4X, ENW4X or Coil Casing NAEA (subbase not required)
Upflow Applications on Combustible or Noncombustible
Downflow Applications on Noncombustible Flooring
21
(533)
Downflow Applications on Combustible Flooring
Downflow Applications on Combustible Flooring with Coil
END4X, ENW4X or Coil Casing NAEA (subbase not required)
Upflow Applications on Combustible or Noncombustible
Downflow Applications on Noncombustible Flooring
24−1/2
(622)
Downflow Applications on Combustible Flooring
Downflow Applications on Combustible Flooring with Coil
END4X, ENW4X or Coil Casing NAEA (subbase not required)
12
A96285
Table 4 – Opening Dimensions − In. (mm)
APPLICATION
Flooring (subbase not required)
(subbase not required)
(subbase required)
Flooring (subbase not required)
(subbase not required)
(subbase required)
Flooring (subbase not required)
(subbase not required)
(subbase required)
Flooring (subbase not required)
(subbase not required)
(subbase required)
Specifications are subject to change without notice.
Figure 13 − Furnace, Plenum, and Coil or Coil Casing In-
stalled on a Combustible Floor
FURNACE
APPROVED
COIL ASSEMBLY
OR
COIL BOX
COMBUSTIBLE
FLOORING
SHEET METAL
PLENUM
FLOOR
OPENING
PLENUM OPENING
A
B
12−11/16
21−5/8
(322)
(549)
12−9/16
19
(319)
(483)
11−13/16
19
(284)
(483)
12−5/16
19
(319)
(483)
16
21−5/8
(406)
(549)
15−7/8
19
(403)
(483)
15−1/8
19
(384)
(483)
15−1/2
19
(394)
(483)
19−1/2
21−5/8
(495)
(549)
19−3/8
19
(492)
(483)
18−5/8
19
(473)
(483)
19
19
(483)
(483)
23
21−1/8
(584)
(537)
22−7/8
19
(581)
(483)
22−1/8
19
(562)
(483)
22−1/2
19
(572)
(483)
A08556
FLOOR OPENING
C
D
13−5/16
22−1/4
(338)
(565)
13−3/16
19−5/8
(335)
(498)
13−7/16
20−5/8
(341)
(600)
13−5/16
20
(338)
(508)
16−5/8
22−1/4
(422)
(565)
16−1/2
19−5/8
(419)
(498)
16−3/4
20−5/8
(425)
(600)
16−1/2
20
(419)
(508)
20−1/8
22−1/4
(511)
(565)
20
19−5/8
(508)
(498)
20−1/4
20−5/8
(514)
(600)
20
20
(508)
(508)
23−5/8
22−1/4
(600)
(565)
23−1/2
19−5/8
(597)
(498)
23−3/4
20−5/8
(603)
(600)
23−1/2
20
(597)
(508)
441 01 2122 01
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