84" |
2134mm |
120" |
3048mm |
90o elbow=3' |
90" |
2286mm |
Fig. 45 |
The maximum number of elbow degrees in a system is 270 o. (This does not include transition elbow from rear vent to vertical vent.) Fig. 46.
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Fig. 46
HOW TO USE THE VENT GRAPH
1.Determine the height of the centre of the horizontal vent pipe exiting through the outer wall. Using this dimension on the Sidewall Vent Graph (Fig. 47), 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 fireplace in accordance with same. (See examples Fig. 45).
EXAMPLE A:
If the vertical dimension from the floor of the unit is 11 feet (335cm) the horizontal run to the face of the outer wall must not exceed 14 feet (427cm).
EXAMPLE B:
If the vertical dimension from the floor of the unit is 7 feet (214cm), the horizontal run to the face of the outer wall must not exceed
SIDEWALL VENTING GRAPH
(Dimensions in Feet)
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| CENTREOF | DIMENSION | |
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34 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
SEE PAGE 23 FOR VENTING | Fig. 47 |
REQUIREMENTS FOR SNORKELS. |
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