Instruction manual

Figure 10. Straight Vertical, Top or Rear Vent, Roof mounted
power vent.
Figure 10a. Multi-Elbow, Top or Rear Vent, Roof mounted power vent.
R720 & R820 Power Vent Indoor Gas Fireplace
Page 15
XG0772 - 100614
Installation
This section applies to installations where the most efcient vent run
is through the roof� Refer to Appendix A - Power Vent locations,
to ensure the planned Power vent location is acceptable� Refer to
the table below for vent run requirements�
Section 3-2: Installing a Roof Mounted Vent System
Vent Conguration Refer to Figure
Maximum Vent Run
(Horizontal + Vertical)
Maximum Elbows†
Straight Vertical Top or Rear Vent Figure 10
100 Feet
Six 90°
or
equivalent †
Multi-Elbow Top or Rear Vent Figure 10a
Multi-Elbow with 6' downward vent
run Top or Rear Vent
Figure 10b
70 Feet**
† One 90° elbow is equal to two 45° elbows�
** For every additional 1 foot downward vent run subtract 10 feet from the maximum vent run�