507582-04
Page 22 of 54
Issue 2220
Conditioned
Space
Unconditioned
Space
Exhaust
Pipe
Intake
Pipe
Conditioned
Space
Pipe Insulation
Figure 27. Insulating Exhaust Pipe in an Unconditioned Space
Maximum Allowable Exhaust Vent Pipe Length
3
(in ft.) without Insulation in Unconditioned Space for Winter Design
Temperatures
Winter Design Temperatures
1
ºF
(ºC)
Vent Pipe
Diameter
Unit Input Size
045
070
090
110
PVC
2
PP
PVC
2
PP
PVC
2
PP
PVC
2
PP
32 to 21
(0 to -6)
1-1/2 in.
22
N/A
20
N/A
N/A
N/A
N/A
N/A
2 in.
21
18
33
30
46
42
30
30
2-1/2 in.
16
N/A
26
N/A
37
N/A
36
N/A
3 in.
12
12
21
21
30
30
29
29
20 to 1
(-7 to -17)
1-1/2 in.
12
N/A
20
N/A
N/A
N/A
N/A
N/A
2 in.
11
9
19
17
28
25
27
24
2-1/2 in.
7
N/A
14
N/A
21
N/A
20
N/A
3 in.
N/A
N/A
9
9
16
16
14
14
0 to -20
(-18 to -29)
1-1/2 in.
8
N/A
13
N/A
N/A
N/A
N/A
N/A
2 in.
6
4
12
10
19
16
18
15
2-1/2 in.
N/A
N/A
7
N/A
13
N/A
12
N/A
3 in.
N/A
N/A
N/A
N/A
8
8
7
7
1
Refer to 99% Minimum Design Temperature table provided in the current edition of the ASHRAE Fundamentals Handbook.
2
Poly-Propylene vent pipe (PP) by Duravent and Centrotherm
3
Vent length in table is equivalent length. Each elbow is equivalent to 5ft. of straight pipe and should be included when measuring
total length.
NOTE
- Maximum uninsulated vent lengths listed may include the termination (vent pipe exterior to the structure) and cannot exceed 5
linear feet or the maximum allowable intake or exhaust vent length listed in Table 7A through Table 7C.
NOTE
NOTE
- Concentric terminations are the equivalent of 5ft. and should be considered when measuring pipe length.
Table 8.
Содержание 045-12
Страница 3: ...507582 04 Page 3 of 54 Issue 2220 Figure 1 Parts Arrangement ...
Страница 42: ...507582 04 Page 42 of 54 Issue 2220 Table 15A Field Wiring Applications with Conventional Thermostat ...
Страница 43: ...507582 04 Page 43 of 54 Issue 2220 Table 15B Field Wiring Applications with Conventional Thermostat Continued ...
