Vent Guidelines - Jøtul Astrid Installation And Operation Instruction Manual

139987-C GI 645 DV and DV MV 6/21

6.0 Vent Guidelines

• All vent components must be installed in accordance with
the terms of their listing and manufacturer's instructions.
See the Appendix on page 34 for a listing of approved vent
manufacturers. See fig. 6.3 on approved OEM Vent Collar
Adaptors.
• The minimum height of termination cap from the top
of the unit shall be no less than 10 ft. (3.05 m), and the
maximum height shall be no more than 35 ft. (10.67 m).
See figures 6.1 - 6.2.
• Steep roofs, nearby trees, or predominantly windy
conditions can promote weak draft or occasional
downdrafts. In such cases, increasing the height of the vent
or installation of high wind termination caps may alleviate
the condition.
• HORIZONTAL RUNS are not permitted anywhere in the
venting system.
• Vent liners may be no less than 3 inches diameter nor
greater than 3 inches diameter with the following exception:
PROPANE NOTICE: For LP installations with vent runs
greater than 10', it is recommended that a 4" exhaust
liner be used to ensure best operating performance. This is
especially appropriate for installations in warmer climates
and intended for extended run times. Vent pipe adapters
(3" to 4") are available from Jøtul-approved venting
manufacturers. When a 4" Exhaust liner is used, it is
recommended that a 3" Intake liner be run all the way to
the vent terminus.
• Any unused flue or masonry enclosure can be used as a
passageway for venting provided the flue is relined using 3"
or 4" listed, flexible gas liner. The remaining space around
the liner in a masonry or factory-built flue CANNOT be
used to vent any other appliance.
• The gas liner may not be exposed to any living space.
• Installation of any components not manufactured
or approved by Jøtul, or failure to meet all clearance
requirements will void all warranties and could result in
property damage, bodily injury, or loss of life.
• Never modify any venting component, or use any damaged
venting product.
GAS VENT RULE
ROOF SLOPE
Flat to 6/12
Over 7/12 to 9/12
Over 10/12 to 12/12
Over 13/12 to 16/12
Over 17/12 to 21/12
10
• THE GAS APPLIANCE AND VENT SYSTEM MUST
• The minimum vent height above the roof or adjacent walls is
Vent Installation Procedure
This appliance must be vented through the chimney by a pair of
3 inch flexible aluminum liners listed for use with gas appliances.
One duct is attached to the exhaust port on the top of the unit
and will carry the exhaust gases to the outside of the house. This
exhaust liner must run the full length of the chimney and be
directly connected to the chimney termination cap. See figures
6.1 - 6.2.
and will provide fresh air for combustion to the unit. This liner
must extend through the damper area of the fireplace and at least
into the first tile liner of the chimney. (U.S. ONLY). This liner
can also extend the full length of the chimney and connect to
the termination cap. SEE NOTICES BELOW. See also figures
6.1-6.2.
Minimum Height
From Roof
1'0"
2'0"
4'0"
6'0"
8'0"
BE VENTED DIRECTLY TO THE OUTSIDE OF THE
BUILDING, AND NEVER ATTACHED TO A CHIMNEY
SERVING A SOLID FUEL OR GAS BURNING
APPLIANCE.
specified by building codes. A general guide to follow is the Gas
Vent Rule below.
The other 3 inch liner will be attached to the air intake port
NOTICE
If the intake flex does not extend the full length of the
chimney and connect to the unit and the termination cap -
A NONCOMBUSTIBLE BLOCK OFF PLATE MUST BE
CONSTRUCTED AND INSTALLED ABOVE THE UNIT
BELOW THE END OF THE INTAKE DUCT (normally at
the damper area). See figure 6.1.
To avoid cross-venting the insert, label the duct to be
used for the exhaust conduit at both the top and bottom
ends. This ensures that the exhaust duct will be attached
to the correct collar on the insert and on the chimney
termination kit.
CANADA NOTE: Both Intake and Exhaust ducts
must extend the full length of the chimney and be
connected to both the unit and the termination kit.
NOTICE
THE USE OF AN EXISTING CHIMNEY AS AN AIR
INTAKE IS NOT COVERED UNDER THE ANSI
Z21.88-2014 / CSA 2.33-M04 TEST METHODS AND
RESULTING ITS/WHI PRODUCT CERTIFICATION.
THE CODE AUTHORITY HAVING JURISDICTION
MUST BE CONSULTED PRIOR TO PROCEEDING
WITH THIS INSTALLATION METHOD.