A
PLENUM
OPENING
B
D
FLOOR
OPENING
C
FURNACE
CASING
WIDTH
IN. (mm)
Upflow Applications on Combustible or Noncombustible Floor
Downflow Applications on Noncombustible Flooring (KGASB
14–3/16{
Downflow applications on combustible flooring (KGASB sub
(360)
Downflow Applications on Combustible Flooring with CNPV,
CNRV, CAR, or CAP Coil Assembly or KCAKC coil box
Upflow Applications on Combustible or Noncombustible Floor
Downflow Applications on Noncombustible Flooring (KGASB
17–1/2
Downflow applications on combustible flooring (KGASB sub
(445)
Downflow Applications on Combustible Flooring with CNPV,
CNRV, CAR, or CAP Coil Assembly or KCAKC coil box
Upflow Applications on Combustible or Noncombustible Floor
Downflow Applications on Noncombustible Flooring (KGASB
21
Downflow applications on combustible flooring (KGASB sub
(533)
Downflow Applications on Combustible Flooring with CNPV,
CNRV, CAR, or CAP Coil Assembly or KCAKC coil box
Upflow Applications on Combustible or Noncombustible Floor
Downflow Applications on Noncombustible Flooring (KGASB
24-1/2
Downflow applications on Combustible flooring (KGASB sub
(622)
Downflow Applications on Combustible Flooring with CNPV,
CNRV, CAR, or CAP Coil Assembly or KCAKC coil box
{ Not all families have these models.
Fig. 21 − Installation on Combustible Flooring
Table 8 – Opening Dimensions − In. (mm)
APPLICATION
ing (KGASB subbase not required)
subbase not required)
base required)
(KGASB subbase not required)
ing (KGASB subbase not required)
subbase not required)
base required)
(KGASB subbase not required)
ing (KGASB subbase not required)
subbase not required)
base required)
(KGASB subbase not required)
ing (KGASB subbase not required)
subbase not required)
base required)
(KGASB subbase not 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)
25
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)
(565)
19
13-3/16
19-5/8
(483)
(335)
(498)
19
13-7/16
20-5/8
(483)
(341)
(600)
19
13-5/16
(483)
(338)
(508)
21-5/8
16-5/8
22-1/4
(549)
(422)
(565)
19
16-1/2
19-5/8
(483)
(419)
(498)
19
16-3/4
20-5/8
(483)
(425)
(600)
19
16-1/2
(483)
(419)
(508)
21-5/8
20-1/8
22-1/4
(549)
(511)
(565)
19
20
19-5/8
(483)
(508)
(498)
19
20-1/4
20-5/8
(483)
(514)
(600)
19
20
(483)
(508)
(508)
21-1/8
23-5/8
22-1/4
(537)
(600)
(565)
19
23-1/2
19-5/8
(483)
(597)
(498)
19
23-3/4
20-5/8
(483)
(603)
(600)
19
23-1/2
(483)
(597)
(508)
A10491
D
20
20
20
20