10
Majestic Fireplaces
©
NVCR Series B-Vent
20001315
Install the Venting System,
Flashing and Termination
Refer to venting installation instructions provided by the
B-Vent manufacturer.
Refer to Figure 1 on Page 3 to locate chimney center-
line dimension from a combustible back wall.
•
Minimum vertical chimney height - 12 feet
(3.65m)
•
Maximum vertical height - 40 feet (12m)
•
Minimum height with two elbows - 16 feet
(4.06m)
•
Elbow requirements allow a maximum of two
90 degree elbows or four 45 degree elbows per
installation. (Two 45 degree elbows = one 90 de-
gree elbow.) See venting chart for proper elbow
offset runs.
For firestop positioning, refer to Figure 9. Only one (1)
firestop required per frame.
NOTE:
A firestop is not
required at the roof.
Install Outside Air Kit - Model AK-MST
See separate instructions provided with outside air kit.
Measure/Cut/Frame Ceiling Hole
(Non-chase Installation)
See venting installation instructions provided by the B-
vent manufacturer.
FP567
NVBR/NVBC VENTING RUNS
11/12/97
Venting Runs
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
8 9 10
1 2 3 4 5 6 7
Horizontal Run (in feet)
Vertical Run (in feet)
A
A:
Vertical installations up to 40 feet (12m) in
height. Up to a 6 ft. horizontal vent run can be
installed within the vent system using a
maximum of two 90-degree elbows or four
45-degree elbows.
B:
Vertical installations up to 40 feet (12m) in
height. Up to a 10 ft. horizontal vent run can be
installed within the vent system using a
maximum of two 45-degree elbows.
B
= Acceptable venting configuration
= Unacceptable venting configuration
Table 4
Venting configuratons.
FP567
Ceiling Installation
FP384
FIRESTOP
11/21/96
adapted from IGF53
Attic Installation
Firestop position when area above ceiling is an attic.
Firestop position when area above ceiling is NOT an attic.
(Firestop/draftstop
appearances may
vary. Only 1 firestop
required per frame.)
Nails (4)
Firestop
Spacer
Joist
Fig. 9
Firestop/draftstop positions.
FP384
f i r e - p a r t s . c o m
