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Co-linear Vent Installation
The GF 300 DV may be vented through a masonry or
Class A prefabricated chimney using a Co-linear Flexible
Vent system approved for use with a solid-fuel burning
fireplace. When installed in the manner described below,
this system can improve the performance of the appli-
ance in cold climate situations, as well as simplify the
vent installation. See fig. 14.
These installation requirements must be followed:
1. Use the guidelines for Co-linear Vent Termination
appropriate for your gas type on pages 10 - 11.
1. Prior to the installation the chimney flue must be
thoroughly cleaned and inspected by a qualified
chimney service person.
2. In a masonry chimney, a fireclay liner must be present
the entire length of the chimney.
3. Prefabricated chimneys must be UL 103 or ULC S-629
listed and have a minimum INSIDE diameter of 6
inches, (150 mm).
4. No appliance can be installed into a chimney flue
serving any other appliance of any kind.
5. THE AIR INTAKE FLEX PIPE MUST EXTEND 6 FEET
BEYOND THE DAMPER AREA OF THE FIREPLACE.
6. If the intake flex duct does not extend the full length
of the chimney and connect to both the unit and the
termination cap, A METAL BLOCK OFF PLATE MUST BE
CONSTRUCTED AND INSTALLED ABOVE THE UNIT
PRIOR TO THE END OF THE INTAKE FLEX AND MUST
COMPLETELY SEAL THE CHIMNEY FLUE FROM THE
ROOM.
Consult with the local code authority having juris-
diction before proceeding with this type of installation.
Refer to the vent manufacturer’s instructions for
specific installation requirements.
WARNING: FAILURE TO POSITION THE PARTS AND
STOVE IN ACCORDANCE WITH THESE DIAGRAMS OR
FAILURE TO USE ONLY PARTS SPECIFICALLY APPROVED
FOR USE WITH THIS APPLIANCE MAY RESULT IN PROP-
ERTY DAMAGE OR PERSONAL INJURY. BE SURE TO
MAINTAIN THE PROPER CLEARANCES TO COMBUSTIBLES
AS DEFINED IN THIS MANUAL AND IN THE INSTRUC-
TIONS PROVIDED WITH EACH VENT COMPONENT.
Figure 14. Co-linear Adaptor installed through a masonry
chimney. Simpson Dura-Vent components shown.
Figure 15. Simpson Dura-Vent #923GCL Co-linear Adaptor.
Subtract 2 1/4” for Short Legs.
Max. offset
24”
(609 mm)
The Air
Intake Flex
pipe must
extend 6
feet beyond
the damper.
The chimney
must be sealed
off from the
room by a steel
plate at the
damper area.
#991 High
Wind Cap
Exhaust Gas
Intake Air
Max. Co-linear
Height - 35 ft.
(10.66 m)
Min. Co-linear
Height - 8 ft.
(2.44 m)
Dual 3”Flex
Liners
28 3/4”
to top of
Co-linear
Adapter.
25”
to center
of flue
collar