Passing Through A Combustible Wall Or Ceiling; Venting Requirements - Vermont Castings SNV30 Homeowner's Installation And Operating Manual

Passing Through a
Combustible Wall or Ceiling
An approved pass-through device is always required
when a vent passes through a combustible wall or ceil-
ing. Check with the maker of the vent system for the
correct listed devices that are available. A listed pass-
through device is required whether or not the installa-
tion includes decorative pipe around the Type B venting
system. NOTE: It is essential to seal between the ceil-
ing support (sometimes called a 'firestop spacer') and
the decorative pipe, if installed, with a high-temperature
silicone sealant. (Fig. 6)
Complete the venting system installation according to
the manufacturer's instructions.
Air Space as Re-
quired by Code
High-tempera-
ture Silicone
Sealant
Decorative
6" Pipe
Listed 4"
(102 mm)
ST361
B-Vent
Fig. 6 A ceiling pass-through, with decorative pipe around the
ST361
vent.
Ceiling pass thru
5/11/00 djt
20007067
Joists
Ceiling
Support
Trim Col-
lar
High-tem-
perature
Silicone
Sealant
Air Space
Stardance Natural Vent Gas Heater

Venting Requirements

36
34
A
32
B
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
1 2 4 6 8 10 12 14 16 18 20 22 24
Horizontal Run (in feet)
Venting Runs
NOTE: When venting staight vertical, without an
elbow, a minimum of 8 ft. vertical is required
off the top of the stove.
= Acceptable venting configuration
= Unacceptable venting configuration
A: Vertical installations up to 36 feet (12m) in
height. Up to an 18 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 36 feet (12m) in
height. Up to a 24 ft. horizontal vent run can be
installed within the vent system using a
maximum of two 45-degree elbows.
(Ratio = 2/3, Hor./Vert.)
Fig. 7 Vent termination window.
FP567
NVBR/NVBC VENTING RUNS
11/12/97
FP567b
7