9
DOWNFLOW SUBBASE — DIMENSIONS (In.)
* The plenum should be constructed 1/4 in. smaller in width and depth than the plenum dimensions shown above.
FURNACE
CASING
WIDTH FURNACE IN DOWNFLOW APPLICATION
PLENUM OPENING* FLOOR OPENING HOLE NO.
FOR WIDTH
ADJUSTMENTABCD
17-1/2
Furnace with or without CD5 or CK5 Coil
Assembly or KCAKC Coil Box
15-1/8 19 16-3/4 20-3/8 3
21
Furnace with or without CD5 or CK5 Coil
Assembly or KCAKC Coil Box
18-5/8 19 20-1/4 20-3/8 2
24-1/2
Furnace with or without CD5 or CK5 Coil
Assembly or KCAKC Coil Box
22-1/8 19 23-3/4 20-3/8 1
LOCATING
TAB
LOCATING
TAB
1
2
3
4
4
3
2
1
B
D
Assembled Disassembled
A97427 A88207
CONCENTRIC VENT
DIMENSIONS (In.)
* Dimension A will change accordingly as dimension D is lengthened or shortened.
† Dimension D may be lengthened to 60 in. maximum. Dimension D may also be
shortened by cutting the pipes provided in the kit to 12 in. minimum.
KIT PART NO. A* B C D† EF
KGAVT0501CVT 33-3/8 2 3-1/2 16-5/8 6-1/4 5-3/4
KGAVT0601CVT 38-7/8 3 4-1/2 21-1/8 7-3/8 6-1/2
A97110
C IN. DIA
B IN. DIA PVC
VENT/EXHAUST
1
3
/
16
B IN. DIA PVC
INTAKE/COMBUSTION AIR
D
E
F
A
1
1
/2
C
A
1
1
/
4
″ TYP
PLENUM
OPENING
FACTORY-SUPPLIED
FIELD-INSTALLED
INSULATION
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