Fireplace specifications, Gas vent rule – Maxon Telecom MPB3328CNE User Manual
Page 5
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
5
F
E
B
D
C
G
Top View
FRAMING
SPACERS
(Top and Sides
and Rear)
Front View
3 (76)
A
J
H
Flue Outlet For B-Vent Connection
OPTIONAL ELECTRICAL
INLET KNOCKOUT
REQUIRING A FIELD
PROVIDED JUNCTION
BOX (Either Side)
GAS INLET
(Either Side
and bottom)
NOTE - Hood shown
as positioned
in louvered
front model.
ELECTRICAL INLET
2-3/4 x 2 (70 x 51) COVER
PLATE with KNOCKOUT)
K
1/2 (13)
3 (76)
1
³⁄₈
(35)
(140)
5-1/2
9-3/8
(238)
2
(53)
Right Side View
(140)
5-1/2
9-3/8
(238)
1-3/8
(35)
Left Side View
GAS INLET
(See Also
Right Side View)
ELECTRICAL INLET
(See Also
Right Side View)
3
(76)
OUTSIDE AIR
SHUTTER
8-15/16
(227)
7-3/8
(187)
ELECTRICAL
INLET
(Optional)
.
o
N
l
e
d
o
M
A
B
C
D
E
F
G
.
n
i
5
3
8
/
1
-
8
/
1
-
2
3
9
1
2
/
1
-
9
2
5
3
8
/
1
-
8
/
-
6
1
/
7
-
2
5
8-3/4
13
330
406
16
406
16
406
16
m
m
2
9
8
6
1
8
3
8
4
9
4
7
2
9
8
2
3
6
6
1
3
7
2
1
222
.
n
i
8
/
1
-
0
4
8
/
1
-
7
3
4
2
2
/
1
-
4
3
8
/
1
-
0
4
8
/
7
-
9
2
1
6
1
/
5
1
-
4
5
8-3/4
m
m
9
1
0
1
3
4
9
0
1
6
6
7
8
9
1
0
1
9
5
7
9
7
3
7
2
1
22
2
.
n
i
8
/
1
-
0
4
8
/
1
-
7
3
4
2
2
/
1
-
9
3
8
/
1
-
5
4
8
/
7
-
4
3
6
1
/
7
-
7
1
6
8-3/4
m
m
6
4
1
1
3
4
9
0
1
6
3
0
0
1
6
4
1
1
6
8
8
3
4
4
2
5
1
222
MPB3328
MPB3530
MPB4035
MPB4540
in.
mm
33-1/8
841
432
765
841
699
21-1/2
33-1/8
4
546
102
273
27-1/2
17
30-1/8
24-7/8
621
12-7/16
10-3/4
J
K
H
6-1/2
165
FIREPLACE SPECIFICATIONS
Figure 4
Venting
GAS VENT RULE
Gas vent caps are not permitted within 8 feet
(2.4 mm) of a vertical wall or similar obstruc-
tion. Gas vent caps that are located 8' or more
from a portion of a building which extends at
an angle greater than 45° upward from the
horizontal may terminate in accordance with
Table 4 and Figure 5, provided that in no case
shall any discharge opening on the cap be less
than 2' (610 mm) horizontally from the roof
surface (National Fuel Gas Code ANSI Z223.1
(NFPA 54) 7.6.2) (CAN/CGA B149).
Figure 5
Termination Heights For Vents
Above Flat Or Sloped Roofs
Ref. NFPA 54 / ANSI Z223.1, 7.6
Roof Pitch
Feet
Meters
Flat to 6/12
1' 0"
0.3
Over 7/12 to 9/12
2' 0"
0.6
Over 10/12 to 12/12
4' 0"
1.2
Over 13/12 to 16/12
6' 0"
1.8
Over 17/12 to 21/12
8' 0"
2.4
Table 4
Roof Pitch is X/12
Minimum Height from Roof to
Lowest Discharge Opening
X
12
1" (25 mm)
Minimum
Gas Vent Rule
Note: Venting terminals shall not be recessed
into a wall or siding.