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MASTER FLUE VENTING REQUIREMENTS CHART
NOTE: THIS CHART IS APPLICABLE TO NATURAL GAS ONLY. FOR LPG INSTALLATIONS, SEE TABLE ON LEFT
SIDE OF THE CHART, BELOW.
Important Notes
:
- Always use the longest vertical starter pipe section as the first vertical section attached to the fireplace directly.18” min-
imum vertical section is required for Natural Gas and 24” minimum 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 42 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 horizon-
tal for LPG. If the starter vertical section is less than 4 feet, use the chart and reduce 4 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 connect-
ed directly to the top of this fireplace is 4 feet or longer.
High Altitude Installation Information
: Prior to installing at altitudes higher than 7500, please contact the Mendota tech-
nical 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
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