Empire Comfort Systems DVX36DP31 - Manual (Page 14)

25613-0-0309 Page 14
To Use the Vent Graph (Figure 17)
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:
If the vertical dimension from the floor of the unit is 35 feet,
the horizontal run to the outer wall flange must not exceed
6.5 feet.
EXAMPLE B:
If the vertical dimension from the floor of the unit is 6.5
feet, the horizontal run to the outer wall flange must not
exceed 14.5 feet.
Special Note: For each 45 degree elbow installed in the
horizontal run, the length of the horizontal run MUST be
reduced by 18" (45cm). This does not apply if the 45 degree
elbows are installed on the vertical part of the vent system.
Reduce 3' for every 90° elbow.
Example: According to the chart the maximum horizontal
vent length is 20' and if two 45 degree elbows are required
in the horizontal vent it must be reduced to 17'.
The maximum number of 45 degree elbows permitted per
side wall installation is two (2). These elbows can be installed
in either the vertical or horizontal run.
Note: On vertical venting the first elbow does not get
counted.
Note: Flue heat shield must be installed for venting
applications with less than two feet of vertical pipe off the
top of the fireplace.
Figure 17
Acceptable vertical and horizontal vent run.
(40' maximum vertical and 20' maximum horizontal)
Unacceptable vertical and horizontal vent run.
Venting Graph (Dimensions in Feet)
VENTING FIREPLACE - TOP
TOP EXIT - VERTICAL AND HORIZONTAL TERMINATION
(DIMENSIONS IN FEET)
VER
TICAL
DIMENSION
FROM
THE
BOTT
OM
OF
THE
UNIT
TO
THE
CENTER
OF
THE
FLUE
OUTLET
WITH
VER
TICAL
OR
HORIZONT
AL
TERMINA
TION
CAPS
TOP VENT
CONNECTION
HORIZONTAL RUN
FLUE HEAT
SHIELD
REQUIRED