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Page 22
To Use the Vent Graph
1. Determine the height of the center of the horizontal vent pipe.
Using this dimension on the Sidewall Vent Graph, locate the
point it intersects with the slanted graph line.
2. From the point of this intersection, draw a vertical line to the
bottom of the graph.
3. Select the indicated dimension, and position the unit in
accordance with same.
EXAMPLE A:
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EXAMPLE B:
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EXAMPLE C:
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must not be less than 7 feet 6 inches.
SPECIAL NOTE:
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the length of the horizontal run MUST be reduced by 18 inches.
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elbows are installed on the vertical part of the vent system.
Example:
According to the chart the maximum horizontal vent length
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it must be reduced to 17 feet.
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installation is two. These elbows can be installed in either the vertical
or horizontal run.
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Note:
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Note:
A horizontal vent with the minimum required vertical rise (using
a 12-inch section of vent before the elbow) will use a maximum of
a 2-foot section of horizontal vent before the termination.
VENTING FIREPLACE
Figure 33
Acceptable vertical and horizontal vent run.
(40' maximum vertical and 20' maximum horizontal)
Unacceptable vertical and horizontal vent run.
See Figure 34
on Page 23 for A, B and C examples.
VENTING GRAPH (Dimensions in Feet)
