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13
Ta ble 4 – Opening dimensions (In.)
FURNACE
CASING
WIDTH
APPLICATION
PLENUM OPENING FLOOR OPENING
A B C D
14–3/16
Upflow Applications on Combustible or Noncombustible
Flooring (KGASB subbase not required)
12---11/16 21---5/8 13---5/16 22---1/4
Downflow Applications on Noncombustible Flooring (KGASB
subbase not required)
12---9/16 19 13---3/16 19---5/8
Downflow applications on combustible flooring
(KGASB subbase required)
11---13/16 19 13---7/16 20---5/8
Downflow Applications on Combustible Flooring with CD5 or
CK5 Coil Assembly or KCAKC coil box
(KGASB subbase not required)
12---5/16 19 13---5/16 20
17–1/2
Upflow Applications on Combustible or Noncombustible
Flooring (KGASB subbase not required)
16 21---5/8 16---5/8 22---1/4
Downflow Applications on Noncombustible Flooring
(KGASB subbase not required)
15---7/8 19 16---1/2 19---5/8
Downflow applications on combustible flooring
(KGASB subbase required)
15---1/8 19 16---3/4 20---5/8
Downflow Applications on Combustible Flooring with CD5 or
CK5 Coil Assembly or KCAKC coil box
(KGASB subbase not required)
15---1/2 19 16---1/2 20
21
Upflow Applications on Combustible or Noncombustible
Flooring (KGASB subbase not required)
19---1/2 21---5/8 20---1/8 22---1/4
Downflow Applications on Noncombustible Flooring
(KGASB subbase not required)
19---3/8 19 20 19---5/8
Downflow applications on combustible flooring
(KGASB subbase required)
18---5/8 19 20---1/4 20---5/8
Downflow Applications on Combustible Flooring with CD5 or
CK5 Coil Assembly or KCAKC coil box
(KGASB subbase not required)
19 19 20 20
24---1/2
Upflow Applications on Combustible or Noncombustible
Flooring (KGASB subbase not required)
23 21---1/8 23---5/8 22---1/4
Downflow Applications on Noncombustible Flooring
(KGASB subbase not required)
22---7/8 19 23---1/2 19---5/8
Downflow applications on Combustible flooring
(KGASB subbase required)
22---1/8 19 23---3/4 20---5/8
Downflow Applications on Combustible Flooring with CD5 or
CK5 Coil Assembly or KCAKC coil box
(KGASB subbase not required)
22---1/2 19 23---1/2 20
UPFLO
W OWNFLOW
HORIZONTAL
YES
NOT
RECOMMENDED
YES
YES
YES
120û
MIN
YES
120û
MIN
YES
120û
MIN
90û
90û
NOT
RECOMMENDED
NOT
RECOMMENDE
D
D
A02329
Fig. 14 -- Duct Flanges
312A