Montigo RP620 - Manual (Page 20)

RP620 Power Vent Indoor Gas Fireplace
Page 20
XG0777 - 122014.1
Installation
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.
* Not for rigid elbows used in between flex sections
Venting Calculation Rigid Vent Flex Venting
Maximum Vent Run - Rigid 80' total length 60' total length
90 degree elbow subtract 10' each * subtract 5' each
45 degree elbows subtract 5' each * subtract 2' each
Down sections subtract 2' for every 1' down subtract 2' for every 1' down
Flex Venting (if mixed with rigid)
Subtract 1.3' for every 1'
section
Section 6: Venting Configuration for PVVEX58-300, PVHEX58-300 and PVHFL58-300
Figure 15. Venting Configuration