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138727_Rev_F 8/9/11
The minimum vent height above the roof or
adjacent walls is specified by major building codes. A
general guide to follow is the Gas Vent Rule below.
The other 3” liner will be attached to the intake
port on the back of the unit and will provide fresh air
for combustion to the unit. This liner must extend a
minimum of 6 ft. off the back of the unit and extend
through the damper area of the fireplace and into the
first section of pipe. This liner can also extend the full
length of the chimney and connect to the termina-
tion cap. See figure 7.
IMPORTANT:
If the intake flex does not extend the full length of
the chimney and connect to the unit and the termi-
nation cap - THEN A METAL BLOCK OFF PLATE MUST
BE CONSTRUCTED AND INSTALLED ABOVE THE UNIT
PRIOR TO THE END OF THE INTAKE FLEX (normally at
the damper area).
CANADA REQUIREMENT: Both the Intake
and the Exhaust liners must extend the full
length of the chimney and be securely con-
nected to both the unit and the termination
kit.
If the fireplace has been modified to accom-
modate installation, use anchors or masonry
nails to attach the metal Fireplace Conversion
Notice Plate supplied with this unit to the
back wall of the masonry fireplace firebox
where it will be readily seen should the insert
be removed.
Cutting of any sheet metal parts on a solid-fuel
fireplace is prohibited.
If the factory-built fireplace has no gas access
hole(s) provided, an access hole 1.5” diameter or less
may be drilled through the lower sides or bottom of
the firebox in a proper workmanship-like manner.
This access hole must be plugged with noncombus-
tible insulation after the gas supply line has been
installed.
GAS VENT RULE
Flat to 6/12
1’0” 0.3M
Over 7/12 to 9/12
2’0” 0.6M
Over 10/12 to 12/12
4’0” 1.2M
Over 13/12 to 16/12
6’0” 1.8M
Over 17/12 to 21/12
8’0” 2.4M
Minimum Height
From Roof
ROOF SLOPE
Exhaust Gas
Figure 7. Factory-built fireplace vent configuration with
direct connection to chimney termination cap as required
in Canada.
Metal block-off plate
is required to seal flue
from the living area if Air
Intake pipe does not con-
nect directly to a Direct
Vent Termination at the
top of the chimney
Clearance to
combustible
materials must
be maintained
in accordance
with the fireplace
manufacturer’s
listing.
Listed Flexible
Gas Liners
Max. Height 35 ft.
Min. Height 10 ft.
Hearth protection
must be maintained
in accordance with the
fireplace manufac-
turer’s listing.
Intake Air
Factory-built Class
A Listed Solid Fuel
Chimney within
wood framed
chase.
Storm Collar
Listed Direct Vent
Standard or high-wind
Termination Cap
DO NOT BLOCK OFF
DOUBLE OR TRIPLE-WALL
CHIMNEY AIR FLOW.
