Lennox Hearth VIS35 - Manual (Page 13)

1
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
s
norkel
t
erminations
For installations requiring a vertical rise on the exterior of
the building, 14-inch and 36-inch tall snorkel terminations
are available. When using a snorkel, the stove can be vented
directly out the back. There is a vent starter collar fastened
to the stove (to vent straight out the back), remove the four
screws securing the collar, rotate the collar 180 degrees and
refasten using the same four screws. Make sure the gasket
between the collar and the stove is properly positioned
before refastening the collar. After rotating the collar, it will
be positioned horizontally. When this pipe passes through a
wall, a wall thimble - Simpson part number 942or Security™
part number SV4RSM is required. The hole in the wall for
the wall thimble should be 9-1/4” wide by 10-1/4” high. To
vent out the rear wall, add up to a 12” section of pipe and
then the snorkel. When the stove is located in a corner of
the room, to vent horizontally first add a 45 degree elbow,
then up to a 12” section of pipe and lastly the snorkel.
Installations using a snorkel have no restrictor installed in
the pipe (see pages 14 and 15 for restrictor positioning).
Follow the same installation procedures as used for standard
horizontal terminations. If the snorkel termination must be
installed below grade, (i. e. basement application), proper
drainage must be provided to prevent water from entering
the snorkel. Do not attempt to enclose the snorkel within
the wall, or any other type of enclosure. On vinyl siding,
furring strips may be used to ensure that the snorkel is not
recessed into the siding.
Framed Hole: 9-1/4”
Wide by 10-1/4” High
Wall Thimble
Elbow
Termination
Cap
A Minimum of 18”
Section of Pipe
Wall Thimble
Framed Hole:
9-1/4”x 10-1/4”
High
Snorkel
v
ertiCal
v
ent
i
nstallation
Important Notes
1. All vertically terminated vent installations use 6-5/8”x 4”
Security™ Secure Vent™ pipe*.
2. If the vent passes through a ceiling or floor, a firestop
- Simpson #963 or Security™ #SV4BF - is required.
3. If the vent passes through the roof, a roof flashing - Simp-
son #943 or 943S or Security™ #SV4FA or SV4FB - and
storm collar - Simpson #953 or Security™ #SV4FC - are
required.
4. A 1-inch clearance from the vent pipe to combustible
materials must be maintained.
5. A maximum of either two 45º elbows or two 90º elbows
may be used. See diagrams showing allowable offsets.
6. The maximum system height is 30 feet and the minimum
is 10 feet.
Pipe Length
Vertical Termination
Cap
Storm Collar
Flashing
Roof - Maintain 1”
Clearance to Combustibles
Ceiling Minimum
Framing 10”x 10”
Ceiling Firestop
Figure 0
Figure 1
Figure