Maximum Vent Length Quick Reference - Rinnai Sensei N-Series Service Presentation

Maximum Vent Length Quick Reference

Vent Diameter / Vent Type / # of Units
2" x 4" Concentric (Direct Vent)
3" x 5" Concentric (Direct Vent)
2" PVC/CPVC/PP (Dual Pipe - Direct Vent)
3" PVC/CPVC/PP (Dual Pipe - Direct Vent)
3" Centrotherm PP, Vent System (Dual Pipe - Direct Vent)
2" PVC/CPVC/PP (Single Pipe – Room Air)
3" PVC/CPVC/PP (Single Pipe – Room Air)
3" PVC/CPVC (Dual Pipe - Direct Vent) 2 units
4" PVC/CPVC (Dual Pipe - Direct Vent) 2 units
6" PVC/CPVC (Dual Pipe - Direct Vent) 2 units
3" PVC/CPVC (Single Pipe - Room Air) 2 units
4" PVC/CPVC (Single Pipe - Room Air) 2 units
6" PVC/CPVC (Single Pipe - Room Air) 2 units
NOTE:
When calculating vent lengths the termination configuration has an equivalency length that must be added to the total vent length, plus any and all elbows listed below) For
two-pipe vent installations, use the calculated length of the intake or exhaust, whichever is longer. Do not add them together. See installation manual for specifics.
Equivalent lengths – 2" x 4" / 3" x 5" concentric vent
90⁰ Elbow = 6 feet
NOTE:
This document is meant as a guide, not as a replacement for the water heater's and/or common vent installation manuals. Refer to those manuals for appropriate lengths. .
© 2015 Rinnai America Corporation
PROPRIETARY and CONFIDENTIAL
CONCENTRIC DIRECT VENT
TWIN PIPE DIRECT VENT
SINGLE PIPE, NON-DIRECT VENT (Room Air)
PVC / CPVC / PP DIRECT COMMON VENT, RESIDENTIAL
PVC / CPVC / PP NON – DIRECT COMMON VENT (Room Air), RESIDENTIAL
45⁰ Elbow = 3 feet
Enhancing Lives By Changing The Way Water Is Heated
RU130i, RU160i RUR160i
RU180i, RU199i RUR199i
Maximum Equivalent Length in Feet
65 65
150 150
65 65
150 150
150 150
65 65
150 150
65 65
65 150
65 150
65 65
65 150
65 150
Equivalent lengths –2", 3", 4", 6" PVC/CPVC/PP or Common vent
90⁰ Elbow = 10 feet
108
CU160i Demand Duo
CU199i W/CU199
65 65
150 150
65 65
150 150
150 150
65 65
150 150
45⁰ Elbow = 5 feet
11/6/2018