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A
PLENUM
OPENING
B
D
FLOOR
OPENING
C
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
assembly coil or coil box (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
assembly coil or coil box (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
assembly coil or coil box (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
assembly coil or coil box (Subbase not required)
* Not all families have these models.
Fig. 30 - - Installation on Combustible Flooring
Table 8 – 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)
FURNACE
(OR COIL CASING
WHEN USED)
COMBUSTIBLE
FLOORING
DOWNFLOW
SUBBASE
SHEET METAL
PLENUM
FLOOR
OPENING
PLENUM OPENING
A
12--- 11/16
(322)
12--- 9/16
(319)
11--- 13/16
(284)
12--- 5/16
(319)
16
(406)
15--- 7/8
(403)
15--- 1/8
(384)
15--- 1/2
(394)
19--- 1/2
(495)
19--- 3/8
(492)
18--- 5/8
(473)
19
(483)
23
(584)
22--- 7/8
(581)
22--- 1/8
(562)
22--- 1/2
(572)
29
FURNACE
APPROVED
COIL ASSEMBLY
OR
COIL BOX
COMBUSTIBLE
FLOORING
SHEET METAL
PLENUM
FLOOR
OPENING
FLOOR OPENING
B
C
21--- 5/8
13--- 5/16
22--- 1/4
(549)
(338)
19
13--- 3/16
19--- 5/8
(483)
(335)
19
13--- 7/16
20--- 5/8
(483)
(341)
19
13--- 5/16
(483)
(338)
21--- 5/8
16--- 5/8
22--- 1/4
(549)
(422)
19
16--- 1/2
19--- 5/8
(483)
(419)
19
16--- 3/4
20--- 5/8
(483)
(425)
19
16--- 1/2
(483)
(419)
21--- 5/8
20--- 1/8
22--- 1/4
(549)
(511)
19
20
19--- 5/8
(483)
(508)
19
20--- 1/4
20--- 5/8
(483)
(514)
19
20
(483)
(508)
21--- 1/8
23--- 5/8
22--- 1/4
(537)
(600)
19
23--- 1/2
19--- 5/8
(483)
(597)
19
23--- 3/4
20--- 5/8
(483)
(603)
19
23--- 1/2
(483)
(597)
A10491
D
(565)
(498)
(600)
20
(508)
(565)
(498)
(600)
20
(508)
(565)
(498)
(600)
20
(508)
(565)
(498)
(600)
20
(508)
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