12
20306743
KSTDV Series Gas Fireplace
VENTING INSTALLATION
INSTALLATION PLANNING
There are two basic types of direct-vent installation:
•
Horizontal Termination
•
Vertical Termination
It is important to select the proper length of vent pipe for
the type of termination you choose. It is also important to
note the wall thickness.
FOR HORIZONTAL TERMINATION
Select the amount of vertical rise desired. All horizontal run
of venting must have 1/4" rise for every 12" of run towards
the termination below 7
1
⁄
2
" of vertical rise from
fl
oor of
fi
re-
place. With 7
1
⁄
2
feet or more of vertical rise from the
fl
oor
of the
fi
replace, the horizontal run may be level. NEVER
run vent piping down.
You may use up to three 90° elbows in this vent con
fi
gura-
tion. Refer to Vertical/Horizontal Termination Con
fi
gurations
on Page 16.
FOR VERTICAL TERMINATION
Measure the distance from the
fi
replace
fl
oor to the ceil-
ing. Add the ceiling thickness, the vertical rise in an attic
or second story, and allow for suf
fi
cient vent height above
the roof line.
NOTE: You may use two 45° elbows in place of a 90°
elbow. You must follow rise to run ratios when using
45° elbows. The appliance is approved for use with
three 90° elbows maximum or a combination of 90°
and 45° elbows up to a maximum of 270°.
For two-story applications,
fi
restops are required at each
fl
oor level. If an offset is needed in the attic, additional pipe
and elbows will be required.
NOTICE
When installing in a chase, you should
insulate the chase as you would the outside
walls of your home. This is especially
important in cold climates. Insulation
should be considered a combustible
material. Maintain proper clearances to all
combustible materials.
W
ARNING
Always maintain minimum clearances
around vent systems. The minimum
clearances to combustibles for horizontal
vent pipe are 3" at the top* and 1" at the
sides and bottom of the vent system until
the pipe penetrates the nearest vertical
wall (1" required). A 1" minimum clearance
all around the pipe must be maintained at
outside wall and on vertical runs. Do not
pack the open air spaces with insulation
or other materials. This could cause high
temperatures and may present a fi re hazard.
*Unless the vertical run is 7
1
⁄
2
feet or higher
from fl oor of fi replace, the clearance for the
horizontal run is 1" on all sides.
Treatment of fi restops and construction of
the chase may vary from building type to
building type. These instructions are not
substitutes for the requirements of local
building codes. You must follow all local
building codes.
NOTICE
Never run the vent pipe down. This may
cause excessive temperatures which could
cause a fi re.
W
ARNING
You may use a chase with a vent termination with exposed
pipe on the exterior of the house. See
Installing Vent
System in a Chase
below. If pipe is enclosed in chase, it
is not exposed.
It is very important that the venting system maintain its
balance between the combustion air intake and the
fl
ue
gas exhaust. Certain limitations apply to vent con
fi
gurations
and must be strictly followed.
INSTALLING A VENT SYSTEM IN AN
OUTSIDE CHASE
A chase is a vertical boxlike structure built to enclose
venting that runs along the outside of a building. A chase
is required for such venting.
For models purchased after 4/16/15, please see addendum.