Vermont Casting BHDR36 installation instructions See page 23 for Venting Requirements for Snorkels

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.

Sample:	1	-	90 o
	2	-	45 o
	3	-	45 o
	4	-	90 o
	Total	-	270 o

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 8-1/2 feet (259cm).

SIDEWALL VENTING GRAPH

(Dimensions in Feet)

30
29
28		TOTHE	VERTICAL
27
26
25
24		CENTREOF	DIMENSION
23
22
21
20
19		THEHORIZONTAL	FROMTHEFLOOR
18
17
16
15
14
13		VENTPIPE	OFTHEUNIT
12	eg: A
11

10
9
8
7
	eg: B
6
5
4
3

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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