85-03-01205
ML-SERIES FIREPLACE
Page
60
4.9.2
ML- Series Master Venting Chart
WARNING: THIS CHART DOES NOT APPLY FOR THE ML72!
See ML72 Direct Venting Section.
THIS CHART IS APPLICABLE TO NATURAL GAS ONLY. FOR LPG INSTALLATIONS, SEE TABLE ON LEFT SIDE OF THE CHART,
BELOW.
If using a Mendota approved power vent kit, consult the power vent instruction manual for additional venting
configurations.
Always use the longest vertical starter pipe section as the first vertical section attached to the fireplace directly.
18” minimum vertical section is required for Natural Gas and 24” mi
nimum vertical section for LPG applications.
6 inches maximum horizontal pipe run allowed with a 90
0
elbow connected to the 18” minimum vertical section Natural Gas
and 24” vertical section LPG.
Maximum Vertical Run allowed is 40 feet.
Maximum Vent System length allowed is 46 feet.
Maximum number of 90
o
elbows allowed in Zone A is 3 and in Zone B is 4.
In
Zone “A”
, 32 feet maximum horizontal run allowed with a 4 feet starter section for NG and 27 feet maximum horizontal for
LPG. If the starter vertical section is less than 4 feet, use the chart and reduce 3 feet for every 90
0
elbow installed after the first
90
0
elbow.
In
Zone “B”
, 32 feet maximum horizontal run allowed NG (27 feet max for LPG) only if the first vertical section connected
directly to the top of this fireplace is 4 to 14 feet.
HIGH ALTITUDE INSTALLATION INFORMATION
: Prior to installing at altitudes higher than 7500, please contact the Mendota
t
e
chnical service department for specific venting requirements and venting restrictions.
Natural Gas ONLY
V min
H max
18 in.
6 in.
24 in.
6 ft.
30 in.
13 ft.
36 in.
19 ft.
42 in.
25-1/2 ft.
48 in.
32 ft.
4 ft. - 10 ft.
32 ft.
10 ft. - 40 ft.
Varies
**LPG
V min
H max
24 in. (LPG)
6 in.
30 in.
8 ft.
36 in.
14 ft.
42 in.
20 ft.
48 in.
27 ft.
4 ft. - 10 ft.
27fft.
10 ft. - 40 ft.
Varies
