Section 3 -2 Installing A Roof Mounted Vent System - Montigo R520 Installation & Maintenance Manual

Section 3-2: Installing a Roof Mounted Vent System
This section applies to installations where the most efficient 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.
Vent Configuration
Straight Vertical Top or Rear Vent
Multi-Elbow Top or Rear Vent
Multi-Elbow with 6' downward vent
run Top or Rear Vent
† 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.
Figure 10. Straight Vertical, Top or Rear Vent, Roof mounted
power vent.
XG0771 - 040513.3
Installation
Maximum Vent Run
Refer to Figure
(Horizontal + Vertical)
Figure 10
Figure 10a
Figure 10b
Figure 10a. Multi-Elbow, Top or Rear Vent, Roof mounted power vent.
R520 & R620 Power Vent Indoor Gas Fireplace
Maximum Elbows†
100 Feet
equivalent †
70 Feet**
Six 90°
or
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