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Specifications are subject to change without notice.
12
441 01 1422 00
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
Table 4 – Opening Dimensions
−
In. (mm)
FURNACE
CASING
WIDTH
APPLICATION
PLENUM OPENING
FLOOR OPENING
A
B
C
D
14–3/16
(360)
Upflow Applications on Combustible or Noncombustible Floor-
ing (subbase not required)
12
−
11/16
(322)
21
−
5/8
(549)
13
−
5/16
(338)
22
−
1/4
(565)
Downflow Applications on Noncombustible Flooring
(subbase not required)
12
−
9/16
(319)
19
(483)
13
−
3/16
(335)
19
−
5/8
(498)
Downflow Applications on Combustible Flooring
(subbase required)
11
−
13/16
(284)
19
(483)
13
−
7/16
(341)
20
−
5/8
(600)
Downflow Applications on Combustible Flooring with Coil
END4X, ENW4X or Coil Casing NAEA (subbase not required)
12
−
5/16
(313)
19
(483)
13
−
5/16
(338)
20
(508)
17–1/2
(445)
Upflow Applications on Combustible or Noncombustible Floor-
ing (subbase not required)
16
(406)
21
−
5/8
(549)
16
−
5/8
(422)
22
−
1/4
(565)
Downflow Applications on Noncombustible Flooring
(subbase not required)
15
−
7/8
(403)
19
(483)
16
−
1/2
(419)
19
−
5/8
(498)
Downflow Applications on Combustible Flooring
(subbase required)
15
−
1/8
(384)
19
(483)
16
−
3/4
(425)
20
−
5/8
(600)
Downflow Applications on Combustible Flooring Coil with Coil
END4X, ENW4X or Coil Casing NAEA (subbase not required)
15
−
1/2
(394)
19
(483)
16
−
1/2
(419)
20
(508)
21
(533)
Upflow Applications on Combustible or Noncombustible Floor-
ing (subbase not required)
19
−
1/2
(495)
21
−
5/8
(549)
20
−
1/8
(511)
22
−
1/4
(565)
Downflow Applications on Noncombustible Flooring
(subbase not required)
19
−
3/8
(492)
19
(483)
20
(508)
19
−
5/8
(498)
Downflow Applications on Combustible Flooring
(subbase required)
18
−
5/8
(473)
19
(483)
20
−
1/4
(514)
20
−
5/8
(600)
Downflow Applications on Combustible Flooring with Coil
END4X, ENW4X or Coil Casing NAEA (subbase not required)
19
(483)
19
(483)
20
(508)
20
(508)
24
−
1/2
(622)
Upflow Applications on Combustible or Noncombustible Floor-
ing (subbase not required)
23
(584)
21
−
1/8
(537)
23
−
5/8
(600)
22
−
1/4
(565)
Downflow Applications on Noncombustible Flooring
(subbase not required)
22
−
7/8
(581)
19
(483)
23
−
1/2
(597)
19
−
5/8
(498)
Downflow Applications on Combustible Flooring
(subbase required)
22
−
1/8
(562)
19
(483)
23
−
3/4
(603)
20
−
5/8
(600)
Downflow Applications on Combustible Flooring with Coil
END4X, ENW4X or Coil Casing NAEA (subbase not required)
22
−
1/2
(572)
19
(483)
23
−
1/2
(597)
20
(508)