Section 4: Installing The Power Vent; Installing A Roof Mounted Power Vent; Venting Layout; Straight Venting Layout - Montigo R320-ST Installation & Maintenance Manual

R320-ST & 420 ST Power Vent Indoor Gas Fireplace

Section 4: Installing the Power Vent

Montigo supplies a variety of power venting options. The location
of the power vent should be selected and laid out to provide the
shortest possible run to an external wall or through the roof. In the
event that the external power vent is not aesthetically acceptable or
otherwise infeasible, an in-line power vent MAY (contact Montigo for
Details) be utilized.
Installing a Roof Mounted Vertical Exterior Power Vent
(EDVRSPV58)
This section applies to installations where the shortest possible vent
run is through the roof. Refer to Appendix A - Power Vent locations,
to ensure the planned Power vent location is acceptable. Once the
vent location has been established, please refer to the appropriate
section below for installation details.

Venting Layout

Selection of components and details of venting lay out should adhere
to the following guidelines:
■ Ensure there is a minimum run of 2' of straight pipe before
the power vent
■ Ensure the maximum vent run does not exceed 80'
■ Ensure the number of 90° elbows does not exceed 6
■ Ensure the number of 45° elbows does not exceed 12

Straight Venting Layout

V (Maximum Length) Max. # Elbows
V
Figure 4 Typical straight Venting Installations.
Page 10
Installation
Venting Installation
80 Feet 6

Multi-Elbow Installations

Multi-elbow installations are possible up to a maximum of six
at 90° elbows.
Elbow 4
V2
Elbow 2
H1
V1
Elbow 1
Multi Elbow - Venting Installation
V1 + H1 + V2 + H2 + V3
(Maximum Length)
80 Feet
Figure 4a. Multi-elbow Venting Installations.

Downward Vertical Venting

Note: The downward vent run must not exceed 6' of vent run.
Elbow 2
H1
V1
Elbow 1
Multi Elbow - Venting Installation
V1 + H1 + V2 + H2 + V3
(Maximum Length)
40 Feet
Figure 4b. Downward Venting Installations.
V3
Elbow 5
H2
Elbow 3
Max. #
Elbows
6
Elbow 3
V3
D = 6' foot
MAX
Elbow
Elbow 4
H2
Max. #
Elbows
6
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