Vermont Casting DBR33, DBR39, DBR36 HOW to USE the Vent Graph, Vertical Sidewall Venting Graph

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. 22.

Sample:	1	-	90 o
(Fig. 20)	2	-	45 o
	3	-	45 o
	4	-	90 o
	Total	-	270 o
			Fig. 22

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. 21), 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.

EXAMPLE A:

If the vertical dimension from the floor of the unit is 11 feet (3352mm) the horizontal run to the face of the outer wall must not exceed 14 feet (4267mm).

EXAMPLE B:

If the vertical dimension from the floor of the unit is 7 feet (2133mm), the horizontal run to the face of the outer wall must not exceed 8-1/2 feet (2590mm).

VERTICAL SIDEWALL VENTING GRAPH

(Dimensions in Feet)

30
29
28
27															THETO	VERTICAL
26
25
24
23															CENTREOF	DIMENSION
22
21
20
19															THEHORIZONTAL	FROMFLOORTHE
18
13
17
16
15
14
															VENTPIPE	UNITTHEOF
12											eg: A
11
10
9
8
7
							eg: B
6
5
4
3
3	4	5	6	7	8	9	10	11 12	13	14	15	16	17	18	19 20
			HORIZONTAL DIMENSION												Fig. 23

SEE PAGE 15 FOR VENTING

REQUIREMENTS FOR SNORKELS.

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