11
MAXIMUM ALLOWABLE EXPOSED VENT PIPE LENGTH (FT / M) WITH
INSULATION IN WINTER DESIGN TEMPERATURE AMBIENT*
UNIT SIZE
WINTER DESIGN
MAXIMUM PIPE DI-
INSULATION THICKNESS†
TEMPERATURE
AMETER (IN.)
0
3/8
1/2
3/4
1
042060
20
_
F / ---6.7
_
C
2
30 / 9.1
55 / 16.8
61 / 18.6
70 / 21.3
70 / 21.3
0
_
F / ---17.8
_
C
2
16 / 4.9
33 / 10.1
38 / 11.6
46 / 14.0
53 / 16.2
---20
_
F / ---28.9
_
C
2
9 / 2.7
23 / 7.0
26 / 7.9
33 / 10.1
38 / 11.6
042080
060080
20
_
F / ---6.7
_
C
2
37 / 11.2
65 / 19.8
70 / 21.4
70 / 21.3
70 / 21.3
0
_
F / ---17.8
_
C
2
20 / 6.1
39 / 11.9
45 / 13.7
55 / 16.8
63 / 19.2
---20
_
F / ---28.9
_
C
2
11 / 3.4
27 / 8.3
31 / 9.4
39 / 11.9
45 / 13.7
060100
20
_
F / ---6.7
_
C
2---1/2
41 / 12.5
70 / 21.3
70 / 21.3
70 / 21.3
70 / 21.3
0
_
F / ---17.8
_
C
2---1/2
21 / 6.4
42 / 12.8
48 / 14.6
59 / 18.0
68 / 20.7
---20
_
F / ---28.9
_
C
2---1/2
11 / 3.4
28 / 8.5
33 / 10.1
41 / 12.5
49 / 14.9
060120
20
_
F / ---6.7
_
C
3
49 / 14.9
70 / 21.3
70 / 21.3
70 / 21.3
70 / 21.3
0
_
F / ---17.8
_
C
3
26 / 7.9
51 / 15.5
58 / 17.7
70 / 21.3
70 /21.3
---20
_
F / ---28.9
_
C
3
15 / 4.6
35 / 10.7
40 / 12.2
50 / 15.2
59 / 18.0
* Pipe length (ft/m) specified for maximum pipe lengths located in unconditioned spaces. Pipes located in unconditioned space cannot exceed total allowable
pipe length as specified in Table.
†
Insulation thickness based on R value of 3.5 per in.
CONCENTRIC VENT (DIRECT VENT/2--PIPE ONLY) (ALL MODEL SIZES)
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
A97110
Dimensions (in.)
KIT PART NO.
A*
B
C
D
{
E
F
KGAVT0701CVT
33---3/8
2
3---1/2
16---5/8
6---1/4
5---3/4
KGAVT0801CVT
38---7/8
3
4---1/2
21---1/8
7---3/8
6---1/2
* Dimension A will change proportionally 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.
355B
A
V
