24 |
P a g e
F
OU
R
90° ELBOWS MAX IF VER
T
IC
ALL
Y
TE
RM
INA
TE
D
IN
ZO
NE
"
B
".
T
H
R
EE 90° ELBOWS MAX IF H
OR
IZON
T
A
L
L
Y
TE
RM
INA
TE
D
IN
ZO
NE
"
B
".
N
OTE: IN
ZON
E "B"
, MAXIMUM H
OR
IZO
NT
A
L
RU
N
RE
MA
INS
2
0
FE
E
T
R
EGARD
LESS OF T
H
E NU
MBER O
F
9
0
°
E
L
B
O
WS
US
E
D.
ZONE "B"
ZONE "A"
FV41-M MASTER FLUE VENTING REQUIREMENTS CHART
NOTE: THIS CHART IS APPLICABLE TO BOTH NATURAL GAS AND LPG INSTALLATIONS.
IMPORTANT NOTES: See Figure 15, below.
1. 18 inches maximum horizontal pipe run allowed with a 90
0
elbow
connected directly to this fireplace’s flue starter col-
lar.
2. Maximum Vertical Run allowed is 50 feet.
3. Maximum Vent System length allowed is 50 feet.
4. In
Zone “A”
, 20 feet maximum hori-
zontal run allowed with a 4 feet starter
section. If the starter vertical section
is less than 4 feet, use the chart and
reduce 3 feet for every 90
0
elbow in-
stalled after the first 90
0
elbow.
5. In
Zone “B”
, 20 feet maximum hori-
zontal run allowed only if the first ver-
tical section connected directly to the
top of this fireplace is 4 feet or longer.
Three 90
0
elbows may be installed
anywhere within the 20 feet horizontal
run. No reduction in horizontal is re-
quired for the 90
0
elbows used.
HIGH ALTITUDE INSTALLATION
INFORMATION
: Prior to installing at alti-
tudes higher than 7500, please contact
the Mendota technical service department
for specific venting requirements and
venting restrictions.
V min
H max
0 in.
18"
6 in.
3’
12 in.
6’
18 in.
8’
24 in.
11'
36 in.
15
’6”
4 ft. - 30 ft.
20'
31ft. - 50 ft. Varies
Figure 14
