Horizontal Vent Table
To use the Horizontal Vent Table, determine the total vertical height of the system and the number of bends required. Locate
the value on the first column and then move across to see the corresponding maximum allowable horizontal run.
The Horizontal Vent Table has been established for 90
°
horizontal/vertical runs. Therefore, flex pipes that do not
have 90
°
bends will not fall into this vent table relationship.
All Measurements are from the bottom of the appliance.
Total Vertical
Max. Horizontal
Imperial Metric Imperial Metric
MQZDV3927
MQZDV4634
56-1/2”
69-1/2”
1.4m
1.8m
4ft
4ft
2.4m
2.4m
6.5ft 2.0m 20ft 6.1m
7ft 2.1m
20ft
6.1m
8ft 2.4m
20ft
6.1m
9ft 2.7m
20ft
6.1m
10ft 3.0m
20ft 6.1m
11ft 3.4m
20ft 6.1m
12ft 3.7m
20ft 6.1m
13ft 4.0m
20ft 6.1m
14ft 4.3m
20ft 6.1m
15ft 4.6m
20ft 6.1m
16ft 4.9m
20ft 6.1m
17ft 5.2m
20ft 6.1m
18ft 5.5m
21ft 6.4m
19ft 5.8m
23ft 7.0m
20ft 6.1m
25ft 7.6m
25ft 7.6m
20ft 6.1m
30ft 9.1m
15ft 4.6m
45ft 13.7m
0ft 0m
Horizontal Vent Table.
Figure 25 - Vent configuration for 6.5ft [2.0m] vertical and 20ft [6m] horizontal run.
NOTE: Measurements are taken from the center of the pipe.
1/4” Rise Per 12” Run
For Propane Horizontal
installations the venting must
be a minimum of two feet
vertical off the flue before
going horizontal.
46