DuraVent UL 641 User Manual

Installation Instructions

Multi-fuel venting system.
UL 641, UL 1777

PelletVEnt

for Multi-Fuel

A MAJOR CAUSE OF VENT RELATED FIRES IS FAILURE

TO MAINTAIN REQUIRED CLEARANCES (AIR SPACES)
TO COMBUSTIBLE MATERIALS. IT IS OF THE UTMOST

IMPORTANCE THAT PELLETVENT BE INSTALLED ONLY IN

ACCORDANCE WITH THESE INSTRUCTIONS.

NOTE:

Read through all of these instructions before
beginning your installation. Failure to install
as described in this instruction will void the
manufacturer’s warranty, and may have an
eect on your homeowner’s insurance and
UL listing status. Keep these instructions for
future reference. This booklet also contains
instructions for installing a venting system
within an existing masonry chimney, and
for installations passing through a cathedral
ceiling.

Dear Customer, Installer, or End User:

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LISTED

MH8381

MH14420

VENTING SYSTEMS FOR PELLET, OIL AND MULTIFUEL STOVES

For the most up-to-date installation instructions, see www.duravent.com

CONTENTS

CLEARANCES AND APPLICATIONS . . . . . . .. . . . . . . . . . . . . . . . .. . . . . . . . .. . . . . . 4

VENT LISTING, INSTALLATION NOTES . . . . . .. . . . . . . . .. . . . . . . . .. . . . . . . . . . . . 4

TOOLS AND EQUIPMENT YOU MAY NEED, PERMITS . . . . . . . . . . . . . . . . . . . . . 5

GENERAL INSTALLATION INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

INSTALLATION INTO A MASONRY FIREPLACE . . . . . . . . . . . . . . .. . . . . . . . . . . . 9

INSTALLATION THROUGH SIDE OF MASONRY CHIMNEY . . . . . . . . . . . . . . .10

INSTALLATION IN A CATHEDRAL CEILING . . . . . . . . . . . . . . . . . . .. . . . . . . . 13

CLEANING AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

WARRANTY. . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

PelletVEnt

for Multi-Fuel

3

CLEARANCES AND APPLICATIONS

DuraVent’s PelletVent and PelletVent for
Multi-Fuel is listed by Underwriters
Laboratories as 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. Combustible
materials include (but are not limited to)
lumber, plywood,sheetrock, plaster and
lath, furniture, curtains, electrical wiring,
and building insulation of any kind. In the
United States the minimum clearance to
combustibles from PelletVent is 3” for oil,
pellet or other biofuel applications. 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.

For other components not listed
(components not in contact with exhaust
gases), use a regular PelletVent component
(examples: Support Boxes, Tee Support
Bracket, Flashing).
Pipe Sections: 6”, 12”, 24”, 36”, 60” lengths
Adjustable Length Pipe
Stovetop Pipe Adapter
45 & 90 Degree Elbows
Single Tee with Clean-Out Adapter
Clean-Out Adapter
Vertical Cap
Round and Square Horizontal Caps
Wall Thimble

VENT LISTING

PelletVent and PelletVent for Multi-Fuel are
listed (listing numbers MH8381 & MH14420)
to the American standard UL 641 Type L Low
Temperature Venting Systems. PelletVent is
also listed to UL 1777.

4

INSTALLATION NOTES

For the purpose of these instructions,
PelletVent will collectively include PelletVent
and PelletVent for Multi-Fuel, unless
PelletVent for Multi-Fuel is specically called
out. 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. When installing multi-fuel
appliance or an appliance that can burn
pellets, use PelletVent for multi-fuel parts as
specied above.

1. WARNING: When passing through
ceilings and walls, make sure all combustible
materials and building insulation products
are a minimum of 3” 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 improvised solutions.

4. Practice good workmanship. Sloppy work
could jeopardize your PelletVent 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 DuraVent 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. RTV Sealant may be required at all vent
joints. Refer to Appliance manufacturer.

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
not eliminate the need for inspection and
cleaning. During the heating season, inspect
monthly, and clean at least once a year.

TOOLS AND EQUIPMENT YOU
MAY NEED

Eye Protection High-Temperature Waterproof
(RTV) Sealant
Gloves Tape Measure
Screwdriver Saber or Keyhole Saw
Hammer

PERMITS

Contact your local building department or
re ocials regarding any needed permits,
restrictions, and installation inspection
requirements in your area.

GENERAL INSTALLATION
INSTRUCTIONS

PelletVent and PelletVent for Multi-Fuel
are listed with a minimum 3” clearance to
combustibles. Refer to Table 1 for framing
requirements needed for these components.

1. Follow the stove/appliance manufacturer’s
instructions.
A. Choose an appliance that is listed by a
recognized testing laboratory.

B. Connect only one ue per appliance.
C. Follow the appliance manufacturer’s

instructions and safety manual for maximum
eciency and safety. Overring can damage
the appliance and vent.

2. If the vent exit is on top of the stove
(Figure 1):
A. Place the appliance according to the
manufacturer’s instructions.
B. Drop a plumb bob to the center of the
appliance ue outlet and mark center point
on the ceiling, cut a square hole in the ceiling
for the Ceiling Support Firestop Spacer. Refer

to Table 1 for the dimensions of the hole.
C. Connect Pipe Adapter to stove: Attach
each section of pipe by pushing male and
female ends of pipe together and twisting
until pipe is in locked position.
D. When the pipe passes through the Ceiling
Support Firestop Spacer at ceiling, tighten
bolt and clamp around pipe.

E. Always maintain at least 3" clearance
from combustible materials. Where the

chimney passes through additional oors
and ceilings, always install a Ceiling Support
Firestop Spacer.
F. When the PelletVent enters the Attic, install
an Attic Insulation Shield around the vent
(Figures 1 & 3). This will prevent insulation
and debris from collecting near the vent pipe.
Use (4) wood screws to secure the base of the
Attic Insulation Shield to the framed opening.
Adjust the height of the Attic Insulation
Shield by sliding the top cylindrical shield
over the one from the base. Insure that the
top of the Shield is above the level of building
insulation. Secure the Shield in place with at
least two (2) sheet metal screws through the
side of the cylindrical shield. Attach collar
around the top of the Attic Insulation Shield.
G. After lining up for the hole in roof, using
the same method as 2.(B), cut either a round
or square hole in the roof. Always cut the
hole with the proper clearance to sides of
Flashing under the roong materials and nail
to the roof along the upper edge. Do not nail
across the lower edge. Seal all nail heads with
non-hardening waterproof sealant.
H. To nish, apply high-temperature
waterproof sealant where the Storm Collar
will meet the vent and Flashing; slide Storm
Collar down until it sets on the Flashing, put
the Cap on and twist to lock (Figure 2).

3. If the ue exits on back of stove and an
interior installation is desired (Figure 3):
A. Place the appliance according to the
manufacturer’s instructions.
B. Connect a Pipe Adapter to the back of the
stove and attach a Tee to Pipe Adapter, align,

5