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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 fill 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 fires 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.

INSTALLATION NOTES

For the purpose of these instructions, 
PelletVent will collectively include PelletVent 
and PelletVent for Multi-Fuel, unless 
PelletVent for Multi-Fuel is specifically called 
out. Proper planning for your PelletVent 
installation will result in greater safety, 
efficiency, 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 
specified 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 flue 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 firmly 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 fireplace insert, 

Summary of Contents for PelletVent

Page 1: ...PelletVEnt for Multi Fuel Multi fuel venting system UL 641 UL 1777 Installation Instructions ...

Page 2: ...meowner 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 We welcome any comments regarding matters pertaining to our DuraVent products We welcome any ideas input or comp...

Page 3: ...tion 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 Venting Systems for Pellet Oil and Multi fuel Stoves For the most up to date installation instructions see www duravent com for Multi Fuel ...

Page 4: ...ATION NOTES For the purpose of these instructions PelletVent will collectively include PelletVent and PelletVent for Multi Fuel unless PelletVent for Multi Fuel is specifically called out Proper planning for your PelletVent installation will result in greater safety efficiency and convenience saving both time and money Use only authorized DuraVent PelletVent listed parts Do not install damaged par...

Page 5: ...e 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 floors and ceilings always install a Ceiling Support Firestop Spacer F When the PelletVent enters the Attic...

Page 6: ...ed every 4 feet along the vertical run Assemble pipe in the same manner described in Step 2 of the general instructions If an Adjustable Length is required in the horizontal run and the Adjustable Length must enter the Wall Thimble the diameter of the center hole in the Wall Thimble must be enlarged by 1 8 to accommodate the Adjustable Length D Seal the exterior section of the Wall Thimble to the ...

Page 7: ...ND TOP EDGE OF STORM COLLAR SHINGLES OVERLAP ON TOP EDGE OF FLASHING TEE WITH CLEAN OUT ADAPTER CEILING SUPPORT FIRESTOP SPACER ATTIC INSULATION SHIELD PIPE ADAPTER 12 MIN damage to the appliance Either vent Cap should be at least 6 from the wall C Follow the below listed NFPA 211 rule for distance of exit terminal from windows and openings NFPA 211 2003 ed Section 10 4 Termination 10 4 5 1 The ex...

Page 8: ...liance to the Chimney Adapter using a Pipe Adapter lengths of pipe as required and an Adjustable Length pipe Slide the Adjustable Length down over the top pipe section position the installation Figure 4 Figure 5 Figure 6 6 INCHES MINIMUM ROUND HORIZONTAL CAP OPTIONAL OPTIONAL HOUSE SHIELD SQUARE HORIZONTAL CAP 6 INCH MINIMUM BLACK INTERIOR GALVANIZED EXTERIOR TEE SUPPORT BRACKET WALL STRAP DOUBLE ...

Page 9: ...le the first rigid pipe section to the Flex Pipe insuring that the UP arrows shown on the pipe labels are in fact pointing up Push the sections together and twist to lock Screws are not required for a firm lock however should it be desired to use them use stainless steel sheet metal screws 1 4 long DO NOT penetrate the inner liner of the pipe 7 Repeat this process for the remainder of the pipe sec...

Page 10: ...ipe and affix it to the pipe with a 1 4 long stainless steel sheet metal screw Figures 13 14 The Storm Collar will then support the entire vent system Install the Cap Seal the joint at the Storm Collar and any other joints or seams which may appear suspect Figure 15 shows a Tall Cone Flashing modified to fit a chimney where the tile liner protrudes above the masonry as another alternate terminatio...

Page 11: ... PELLET VENT Figure 11 Figure 12 TEE SUPPORT BRACKET TEE WITH CLEAN OUT FLEX PELLET VENT REAR EXIT APPLIANCE TOP EXIT APPLIANCE FLEX PELLET VENT PIPE ADAPTER B C Figure 13 6 INCHES MINIMUM MASONRY ANCHORS PELLET VENT PIPE NONHARDENING SEALANT PELLET VENT CAP TALL CONE FLASHING STORM COLLAR Figure 14 TALL CONE FLASHING SHEET METAL SCREWS TOP VIEW OF STORM COLLAR AND PIPE SHEET METAL SCREW 3 REQUIRE...

Page 12: ...llar and Cap as described in Step 11 for the fireplace installation 6 Connect the horizontal piece of pipe which goes through the masonry to the Tee by pushing it through the hole in the masonry and lining it up with the branch of the Tee Then push it into the Tee while twisting to lock it 7 Once the horizontal pipe section is in place the space between the pipe and the masonry may be filled with ...

Page 13: ...o it can be located from the top of the roof 4 From the roof locate and mark the outline of the Support Box 5 Remove shingles or other roof covering as necessary to cut the rectangular hole for the Support Box Cut the hole 1 8 larger than the dimensions of the Support Box Figure 19 The rectangular hole should be centered on the small hole which you drilled through the ceiling to mark the location ...

Page 14: ...ent pipe as assembled can be no longer than 42 feet 11 Slip the Flashing over the pipe section s protruding through the roof Secure the base to the roof with roofing nails as shown in Figure 24 Insure that the roofing material overlaps the top edge of the Flashing Refer to Figure 2 CLEANING AND MAINTENANCE 1 Have your system cleaned by a certified chimney sweep if you have doubts about your abilit...

Page 15: ...es It is recommended that the vent run inside the building envelope or inside a chase enclosure to minimize the vent s exposure to cold temperatures Be sure to follow all applicable building codes and the requirements of the vent and appliance manufacturers Appliance Operation Always operate your appliance in accordance with the appliance manufacturer s recommendations However operating the applia...

Page 16: ...n bio fuels driftwood or other wood containing salt preservative treated lumber plastic and household trash or garbage or wood pellets containing such materials must not be burned in the appliance or fireplace In case of a chimney fire the chimney must be inspected and approved by a certified Chimney Sweep before reuse After each annual inspection maintenance and cleaning the certified Chimney Swe...

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