Installation Instructions
FasNSeal Flex
DuraFlex SW
Ventinox
Ovalizing Flexible Liners
A MAJOR CAUSE OF VENT RELATED FIRES IS FAILURE
TO MAINTAIN REQUIRED CLEARANCES (AIR SPACES)
TO COMBUSTIBLE MATERIALS. IT IS OF THE UTMOST
IMPORTANCE TO INSTALL ONLY IN ACCORDANCE WITH THESE
INSTRUCTIONS.
IMPORTANT:
Read through all of these instructions
before beginning your installation.
Failure to install this product as described
in these instructions will void the
manufacturer’s warranty, may create a
re or other safety hazard, and may aect
your homeowner’s insurance and safety
listing of your appliance.
Keep these instructions for future reference.
Dear Customer, Installer, or End User:
We welcome any comments regarding
matters pertaining to our DuraVent products.
We welcome any ideas, input or complaints
and I’ll make sure that someone responds
directly back to you.
Send your emails to:
president@duravent.com
If you are searching for tech support or
product information, please phone us at
800-835-4429.
Or email us at:
techsupport@duravent.com
LISTED
MH45609
OVALIZING FLEXIBLE LINERS
For the most up-to-date installation instructions, see www.duravent.com
CONTENTS
APPLICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 4
CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 4
PERMITS . . . .. . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . 4
EQUIPMENT AND MATERIALS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . . 4
GENERAL INSTALLATION NOTES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
CUTTING AND OVALIZING FASNSEAL FLEX AND DURAFLEX SW.. . .. .. . . . 5
OVALIZING VENTINOX .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 7
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Ovalizing Flexible Liners
3
APPLICATION
M&G DuraVent's FasNSeal® Flex is a single
strip double layer super-ferritic stainless
steel for use with natural gas or propane
Categories II, III, and IV appliances or
Canada's Type BH Gas Vent Systems, having
a maximum rated operating temperature
of 480F and a maximum positive pressure
of 6" water column. FasNSeal Flex is the
only exible chimney liner listed to UL 1738
standard. DuraFlex® SW is a single, smooth
wall exible relining system for masonry
chimney. Use with gas, wood pellet, oil or
wood appliances. Applications include:
replace inserts, furnaces, boilers and water
heaters. DuraFlex SW is listed to UL 1777 and
ULC S635. Ventinox® is a single-wall flexible
liner used for upgrading or restoring masonry
chimneys that vent Category I natural gas,
propane or oil appliances, wood or pellet
stoves, fireplaces and fireplace insert.
CLEARANCES
DuraFlex SW exible lining system is listed
at 0" clearance for gas, oil, and pellet
applications. 1" clearance to masonry for
wood-burning applications. Insulation is
required for 0" clearance to masonry for
wood-burning. Ventinox VFT single-wall
exible lining system is listed at 0" clearance
to masonry chimney for oil and gas. With
Thermix or ProFoil insulation 0" clearance
for solid fuels. Ventinox VG single-wall
exible lining system is listed at 0" clearance
to masonry for gas appliances. Check with
your appliance manufacturer to see if larger
clearances are required. Do not ll any air
space clearances with insulation.
PERMITS
Before installation, check with your local
Building Ocial, Fire Ocial, or other
authority having jurisdiction regarding
permits, restrictions, and installation
inspections in your area.
EQUIPMENT AND MATERIALS
90 Angle Grinder
Circle cutting Guide
Up-Cut Mill Bit
Ovalizing Machine
Tape Measure
Proper Gloves and Shoes
Eye Protection
GENERAL INSTALLATION NOTES
Read through these installation instructions
before beginning your installation. A
properly listed installation is dependent
upon installing the vent in full compliance
with these installation instructions. Proper
planning for your exible lining installation
will result in greater safety, eciency, and
convenience, as well as saving time and
money. You must use only authorized
M&G DuraVent vent parts, or other parts
specically authorized in these instructions
and listed by the appliance manufacturer in
order to maintain a safe, approved system.
Do not mix parts or try to match with other
products or use improvised solutions. Do not
install damaged or modied parts. Practice
good workmanship. Sloppy work could
jeopardize your vent’s safety. Keep electrical
wiring and building insulation away from
all chimneys and vents. When deciding the
location of your installation, try to avoid
modications to structural components
of the building. If you have any questions,
contact either your dealer or M&G DuraVent
directly.
Refer to the appliance manufacturer for
the maximum and minimum allowed vent
runs for your specic appliance model,
including maximum number elbows allowed
in the system, and for the pressure drops
and equivalent length of the ttings. The
total vent length from the appliance to the
termination shall not be greater than what is
specied by the appliance manufacturer.
4
WARNING
When the outside diameter of any thing
walled liner is reduced beyond a certain
point, it tends to develop "crinkles" on
the major OD. The same is true when
ovalizing FasNSeal Flex and DuraFlex SW,
it only looks dierent: the inner layer may
begin to "pucker". See Figure 1. While this
does not reduce the structural stability
of the liner, you should be aware of this
possibility.
CAUTION
Wear gloves and eye protection when
handling/cutting any liners.
CUTTING AND OVALIZING
FASNSEAL FLEX AND
DURAFLEX SW
Due to its smooth inner layer not being
mechanically fastened on the downward
side, traditional cutting methods are not
usually successful. By using an Angle Grinder,
a clean cut can easily be achieved.
INSTRUCTIONS
1. Set up the 90 Angle Grinder with the
masonry wheel. Make a cut across the
liner's corrugations, rst, then follow the
corrugations all the way around the liner. See
Figure 2a and 2b
While cutting, rotate the liner away from you
and with the direction of the wheel's rotation.
This method produces a nice, clean cut across
both layers of FasNSeal Flex and DuraFlex SW
greatly increases the lifetime of the Masonry
wheel.
2. Set up the Angle Grinder with an Up-Cut
Mill bit and the Circle Cutting Guide. Set
the guide for the desired hole diameter. See
Figure 3a and 3b.
NOTE: The use of the Up-Cut Mill Bit is
essential, as it pulls the inner layer of steel
against the corrugated layer of FasNSeal Flex,
producing a clean cut across both layers.
3. Drill a 1/4" where the center of the
Universal Take-o will be located in the liner.
4. Position the rubber guard of the Circle
cutting guide into the 1/4" hole. See Figure 4
5. Turn on the Angle Grinder and begin
cutting the liner in a clockwise direction.
Keep the angle Grinder perpendicular to the
liner at all times. You do not need to apply
much pressure - let the drill bit do the cutting
for you. See Figure 5a, 5b, and 5c
OVALIZING VENTINOX
Sizing a chimney system properly is an
important decision the installer must make
when bidding a job. It is often impossible
to insert round liners into chimneys with
rectangular shapes and still maintain the
proper cross sectional area to vent the
appliance and the required insulation
thickness around the liner. Ventinox liners
can be reshaped to feature oval or nearly
rectangular cross sections. Ventinox
distributors have the VOV612 Ovalizing
Machine at their locations and can
accomplish this task to your specications.
Before ordering "ovalized" liners, refer to
Table A, and nd the cross sectional areas
created when round liners are reshaped.
This is important for matching the venting
requirements of an appliance.
Table A shows the cross sectional areas in
square inches, when liners are ovalized from
round to 4"-11" on the minor dimensions.
Example: when a 9" VENTINOX liner is
ovalized so that its minor dimension
measures 6", the cross section area is reduced
from 65 sq. in to 53 sq. in.
Table B shows the major dimensions when
liners are ovalized from round to 4"-11" on
the minor dimensions. Example: When a 9"
5
Figure 1
Figure 2a
Figure 2b
liner is ovalized so that its minor dimension
measures 6", the major dimension measures
11.8".
Figure 4
Figure 5a
Figure 5b
Figure 3a
Figure 5c
Figure 3b
6
CAUTION
These tables were developed specically for Ventinox liners. Other lining materials
behave dierently when ovalized and may not assume major diameters or cross
sectional areas.
Table A
Square Inches Area of Round Ventinox Liner
VENTINOX LINER (INCHES) MINOR DIMENSION
4" 5" 6" 7" 8" 9" 10" 11" 12"
5" Liner 18 20
6" Liner 24 25 28
7" Liner 32 34 36 38
8" Liner 36 42 45 48 50
9" Liner 43 50 53 56 61 64
10" Liner 50 57 63 68 72 76 79
11" Liner 57 65 72 78 83 87 92 95
12" Liner 63 72 79 86 93 99 102 106 112
Table B
Diameters of Round Ventinox Liner
VENTINOX LINER (INCHES) MINOR DIMENSION
4" 5" 6" 7" 8" 9" 10" 11" 12"
5" Liner 5.7 5
6" Liner 7.7 7.0 6
7" Liner 9.3 8.8 8.3 7
8" Liner 10.5 10.3 9.5 9.0 8
9" Liner 12.5 12.0 11.8 10.8 10.0 9
10" Liner 13.8 13.3 13.0 12.5 12.0 11.5 11
11" Liner 15.3 14.8 14.3 13.6 12.8 12.0 11.5 11
12" Liner 16.5 16.2 15.5 15.5 15.0 14.5 14.0 13.0 12
7
M&G DURAVENT WARRANTY
M&G DuraVent, Inc. (“DuraVent”) provides this limited lifetime warranty for all of its products with the exception of Ventinox® (lifetime), and PolyPro® (ten
years). Subject to the limitations set forth below, DuraVent warrants that its products will be free from defects in material or manufacturing, if properly installed,
maintained and used. DuraVent products are fully warranted if installed only by a professional installer. This Warranty is transferable from the original homeowner
to the buyer of the home. This warranty does not cover normal wear and tear, smoke damage or damage caused by chimney res, acts of God, or any product
that was: (1) purchased other than from an authorized DuraVent dealer, retailer or distributor; (2) modied or altered; (3) improperly serviced, inspected or
cleaned; or (4) subject to negligence or any use not in accordance with the installation instructions included with the product as determined by DuraVent.
Installation instructions are available online at www.duravent.com under Support/Literature and through our Customer Service Department 800-835-4429 or
customerservice@duravent.com. This limited lifetime warranty applies only to parts manufactured by DuraVent.
DuraVent provides the following warranties for its products: One Hundred Percent (100%) MSRP 15 years from the date of purchase, and Fifty Percent (50%)
thereafter, except for the following limitations on: all Termination Caps and DuraBlack® are warranted at One Hundred Percent (100%) for ve years.
All warranty obligations of DuraVent shall be limited to repair or replacement of the defective product pursuant to the terms and conditions applicable to each
product line. These remedies shall constitute DuraVent’s sole obligation and sole remedy under this warranty. This warranty provides no cash surrender value. The
terms and conditions of this warranty may not be modied, altered or waived by any action, inaction or representation, whether oral or in writing, except upon
the express, written authority of an executive ocer of DuraVent.
Corn, bio-fuels, driftwood or other wood containing salt, preser vative -treated lumber, plastic and household trash or garbage, or wood pellets containing such
materials must not be burned in the appliance or replace. In case of a chimney re, the chimney must be inspected and approved by a certied Chimney
Sweep before reuse. After each annual inspection, maintenance, and cleaning, the certied Chimney Sweep must ll out and date the appropriate section of the
warranty card provided with the chimney liner.
LIMITATIONS ON INTERNET SALES: Notwithstanding any other terms or conditions of this Limited Lifetime Warranty, DuraVent provides no warrant y for the
following specic products if such products are not installed by a qualied professional installer: DuraTech®, DuraTech® DTC, DuraPlus HTC®, DuraChimney® II,
PelletVent Pro®, DirectVent Pro®, FasNSeal®, FasNSeal® W2, FasNSeal® Flex, and PolyPro®, and M&G DuraVent’s relining products including DuraLiner®, DuraFlex®
(SW, Pro, 316, 304), and Ventinox®. For purposes of this warranty, a trained professional installer is dened as one of the following: licensed contractors with
prior chimney installation experience, CSIA Certied Chimney Sweeps, NFI Certied Specialists, or WETT Certied Professionals.
DuraVent must be notied and given the opportunity to inspect defective product prior to replacement under the terms of this limited lifetime warranty. All
warranty claims must be submitted with proof of purchase. Labor and installation costs are not covered under this warranty. To obtain warranty service contact:
DuraVent Warranty Service, 877 Cotting Ct., Vacaville CA 95688, or call 800-835-4429.
WHERE LAWFUL, DURAVENT DISCLAIMS ALL OTHER WARRANTIES, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. IN NO EVENT WILL DURAVENT BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL, PUNITIVE OR SPECIAL DAMAGES OR DIRECT OR
INDIRECT LOSS OF ANY KIND, INCLUDING BUT NOT LIMITED TO PROPERTY DAMAGE AND PERSONAL INJURY. DURAVENT’S ENTIRE LIABILITY IS LIMITED TO THE
PURCHASE PRICE OF THIS PRODUCT. SOME STATES DO NOT ALLOW LIMITATIONS ON IMPLIED WARRANTIES, OR THE EXCLUSION OR LIMITATION OF INCIDENTAL
OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU. THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL
RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS THAT VARY FROM STATE TO STATE.
For the most up-to-date installation instructions, see www. duravent.com
REV 2.27.2013
Manufactured in Vacaville CA and Albany NY
Customer Service Support 800-835-4429 707-446-4740 FAX www.duravent.com
FasNSeal®, Ventinox®, and DuraFlex® are registered trademarks of M&G DuraVent, Inc.
8
All rights reserved, ©2013 M&G DuraVent is a member of M&G Group.
5/2013 L1244
Loading...