Mendota ML39 Assembly, Installation And Operating Instructions page 58

ML39 Master Venting Chart
Note: This chart is applicable to both natural gas and LP installations.
❑ 9" minimum vertical pipe run required to be connected directly to this fireplace's flue starter collar.
❑ Maximum horizontal run allowed with the minimum 9" vertical run is 12".
❑ Maximum vertical run allowed is 40'.
❑ Maximum vent system length allowed is 44'.
❑ 32' maximum horizontal run allowed with a minimum 4 to 12' starter section. Three 90
the 32' horizontal run. If the starter vertical section is less than 4', use the chart and reduce 3' for every 90
°
the first 90 elbow.
❑
For all vertical terminations, four 90
vent termination cap.
40'-0"
36'-0"
32'-0"
28'-0"
24'-0"
20'-0"
16'-0"
12'-0"
4'-0"
3'-0"
2'-0"
1'-0"
9"
❑
Maximum Horizontal Run
❑ Maximum Horizontal Run allowed is 32 feet if a vertical starter section that is between 4 feet to 12 feet is connected
directly to this fireplace's flue starter collar and no more than three (3) 90-degree elbows are used.
❑ Maximum Horizontal Run allowed is 12" if a 9" starter vertical section is connected directly to this fireplace's flue
starter collar.
Maximum Vent System Length
❑ Combined total length of all straight pipe sections in the vent system shall be less than 44 feet.
❑ Combined total length of all straight pipe sections in the vent system shall be less than 44 feet when using three (3) 90-
degree elbows or equivalent and terminating the vent system horizontally.
❑ Combined total length of all straight pipe sections in the vent system shall be less than 44 feet when using four (4) 90-
degree elbows or equivalent and terminating vertically.
85-03-01136
°
elbows allowed. However, the fourth 90
Figure 4-15 MASTER VENT CHART
ML39
°
elbows may be installed anywhere within
°
°
elbow must point vertically and directly to the
V min
9"
12"
2'
3'
4' – 12'
12' – 40'
8'-0"
elbow installed after
H max
12"
3' 5"
12' 11"
22' 6"
32'
Varies
Page 58