Section 6: Venting - Montigo RP620 Installation & Maintenance Manual

RP620 Power Vent Indoor Gas Fireplace

Section 6: Venting

Vent Configurations
Vent configurations can include vertical sections, horizontal sections, elbows, flex and/or rigid vent
sections. The maximum length of any vent run is 80'. Follow the rules outlined below to determine your
specific vent options. All venting is to be 5" inner and 8" outer sizing. Because this appliance intended to
only be installed with a power vent termination, vertical and horizontal runs can be calculated in the same
manor.
Flexible venting does not flow quite as well as rigid pipe, so a factor needs to be applied, making the total
allowable vent run shorter than rigid pipe.
Venting Calculation
Maximum Vent Run - Rigid
90 degree elbow
45 degree elbows
Down sections
Flex Venting (if mixed with rigid)
* Not for rigid elbows used in between flex sections
Page 20
Installation
Rigid Vent
80' total length
subtract 10' each
subtract 5' each
subtract 2' for every 1' down
Subtract 1.3' for every 1'
section
Flex Venting
60' total length
* subtract 5' each
* subtract 2' each
subtract 2' for every 1' down
XG0777 - 100113.1