Venting Requirements - Lennox Cascade Installation And Operation Manual

VENTING REQUIREMENTS

It is recommended that only an Lennox Hearth Products dealer install your
pellet stove. The specified installation requirements must be followed to
ensure conformity with both the safety listing of the appliance and local
building codes. All clearances, installation instructions and precautions
specified by the vent manufacturer must be followed.
Selecting a Location
Review the appliance clearance requirements before installing the
venting system (see Page 5). Position the appliance far enough away
from walls to allow adequate room for servicing. Choose the appliance
location with the least amount of interference with the house framing,
plumbing, wiring, etc.
Preferred Vent Configuration
For the best performance, we recommend a vent run design which runs
vertically and terminates above the roof line. This design will allow natural
draft to improve the flow of flue gases and will aid in combustion and
stove performance.
Type of Pipe
This stove is approved for venting with Type L and Type PL pellet vent
pipe (sometimes referred to as "L-Vent pellet vent", listed to UL 641 or
ULC S609). We recommend the use of venting products manufactured by
Security Chimneys International. Connect the pellet vent pipe or the "tee"
to the flue collar using a minimum of three screws and seal as specified
in "Pipe/Liner Joint Requirements" on this page. Do not use class B gas
chimney or single wall chimney as a substitute.
Size of Pipe
These pellet appliances are approved for use with the following vent sizes:
3" (75 mm) standard, or 4" (100 mm), see Page 13 - for determining
correct size vent. When 4" pipe is used: for horizontal vent installations
use a 3" (75 mm) to 4" (100 mm) adapter - available from vent manu-
facturer. For vertical installations use a 3" (75 mm) to 4" (100 mm) "tee"
- available from vent manufacturer.
Offsets
In every installation, a single or double clean-out "tee" is recommended
for every ninety-degree offset (this tee will help collect ash residue and
will allow for routine cleaning without the need to disconnect sections
of pipe).
Pipe Clearances/Requirements
See pipe manufacturers instructions for installation of venting components
and clearances. Follow pipe manufacturers installation precautions for
passing pipe through a combustible wall or ceiling (i.e. use an approved
thimble).
Notes
• Offsets and horizontal runs accumulate fly-ash and soot which reduces
the exhaust flow and performance of the stove.
• Total Offsets in venting system should not exceed 270° total in direc-
tion change.
• Maximum Vertical Vent - 30 feet (9.14 M)
• Horizontal Runs - The maximum total horizontal run must not exceed
10 feet (3.1 meters).
• Horizontal run of pipe requires 1/4" (7 mm) rise per foot.
• Pellet vent pipe requires 3" (75 mm) clearance from outside of pipe
unless otherwise specified by vent manufacturer - all diameters: 3" (75
mm) and 4" (100 mm). A support bracket must be installed every 4
feet (1.2 m) of pellet vent pipe on the exterior wall of the house unless
otherwise specified by vent manufacturer.
• It is not recommended to terminate exhaust vent on the prevailing
wind side of the house.
• In Canada, where the venting may pass through a wall, or partition
of combustible materials, the installation shall conform to CAN/CSA-
B365. When installing the wall thimble and other venting components,
follow the vent manufacturers instructions. Maintain an effective
vapor barrier at the location where the chimney or other component
penetrates to the exterior of the structure.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE
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