Installation Guide

4
CLEARANCES AND APPLICATIONS
DuraVent’s PelletVent is listed by
Underwriters Laboratories as a vent for
listed oil-, pellet-, (multi-fuel) appliances.
PelletVent is also listed as a masonry reliner,
in which case the minimum clearance is
0” from vent to masonry, and 0” clearance
from the masonry to nearby combustibles.
Never ll any required clearance space
with insulation or any other materials
(except insulation explicitly approved by
DuraVent as noted below). Combustible
materials include (but are not limited to)
lumber, plywood,sheetrock, plaster and lath,
furniture, curtains, electrical wiring, and
building insulation except that noted below.
The minimum clearance to combustibles
from PelletVent is 1” for oil, pellet or other
approved fuels. A major cause of vent
related res is failure to maintain required
clearances (air spaces) to combustible
materials. It is of the utmost Importance
that double wall pellet vent be installed
only in accordance with these Instructions.
NONCOMBUSTIBLE INSULATION
DuraVent approves the eld application
of non-combustilble insulation within the
clearance to combustible distance (in wall
thimbles or support boxes) if/when desirable.
Approved insulation must be listed /
compliant with ASTM E136/ULC S114 as Non-
Combustible, have a melting temperature
above 2000°F/1100°C, be water resistant with
low moisture absorbtion and be acceptable
to the AHJ. Materials would include those
made from stone (aka “rockwool” or “mineral
wool” insulations). NOTE- Fiberglass
insulation is NOT approved!
VENT LISTING
PelletVent is listed (MH8381 & MH14420)
to UL 641 Type L Low Temperature Venting
Systems, UL 1777 Relining, and ULC S609 Low
Temperature Vents.
INSTALLATION NOTES
Proper planning for your PelletVent
installation will result in greater safety,
eciency, and convenience,saving both time
and money. Use only authorized DuraVent
PelletVent listed parts. Do not install
damaged parts.
1. WARNING: When passing through
ceilings and walls, make sure all combustible
materials and combustible building
insulation products are a minimum of 1” from
the vent pipe.
2. When exiting through walls, make sure
NFPA rules are followed for distance from
windows and openings.
3. Do not mix and match with other products
or improvise solutions.
4. Practice good workmanship. Sloppy work
could jeopardize your installation.
5. Never use a vent with an inside diameter
that is smaller than the appliance ue outlet.
6. Multistory: Where PelletVent passes
through the ceiling, use an approved and
listed Firestop/Support assembly.
7. PelletVent placement: When deciding
the location of your stove and vent, try to
minimize the alteration and reframing of
structural components of the building.
8. Sections of pipe are connected to each
other by pushing them rmly together and
twisting. Screws are not required. If however,
screws are desired, use 1/4”-long sheet metal
screws. Under no circumstances penetrate
the inner liner with screws.
9. 500 RTV Sealant may be required at all vent
joints. Apply to inner female socket. Refer to
Appliance manufacturer for further detail.
10. Never install single-wall pipe to
freestanding pellet stoves. Single-wall pipe
may be connected to a replace insert,
provided it is inside the replace, and the
replace has completely sealed surroundings.
11. Do not connect B-Vent pipe with
aluminum liners to pellet appliances.
12. Inspections: Using pelletized fuel does