Mendota ML39 - Page 58

85-03-01136 ML39 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
°
elbows may be installed anywhere within
the 32’ horizontal run. If the starter vertical section is less than 4’, use the chart and reduce 3’ for every 90
°
elbow installed after
the first 90
°
elbow.
❑ For all vertical terminations, four 90
°
elbows allowed. However, the fourth 90
°
elbow must point vertically and directly to the
vent termination cap.
❑
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.
13'-9"
18'-3"
22'-10"
27'-5"
32'-0"
3'-5"
12'-11"
22'-6"
32'-0"
9"
1'-0"
2'-0"
3'-0"
4'-0"
12'-0"
16'-0"
20'-0"
24'-0"
28'-0"
32'-0"
36'-0"
40'-0"
1'-0"
8'-0"
4'-0"
8'-0"
12'-0"
16'-0"
20'-0"
24'-0"
28'-0"
4'-7"
9'-2"
V min
H max
9”
12”
12”
3’ 5”
2’
12’ 11”
3’
22’ 6”
4’ – 12’
32’
12’ – 40’
Varies
Figure 4-15 MASTER VENT CHART