Common Vent Maximum Equivalent Lengths - Rinnai RU130i Installation Instructions Manual

Common Vent Maximum Equivalent Vent Lengths
For the table below:
•
Header is the main vent pipe into which several vents connect.
•
Vent Length is the distance from the end of the header to the vent
termination.
•
Maximum vent length starts at the end of the header system.
•
Use 10 ft (3 m) as equivalent vent length for 90° elbows.
•
For use with SENSEI™ internal (indoor) tankless
water heaters.
Water Heater
Model
RU199i
(REU-N3237FF-US)
CU199i
(REU-N3237FFC-US)
RUR199i
(REU-NP3237FF-US)
RSC199i
(REU-NP3237FF-US(A))
RU160i
(REU-N2530FF-US)
CU160i
(REU-N2530FFC-US)
RUR160i
(REU-NP2530FF-US)
RSC160i
(REU-NP2530FF-US(A))
RU180i
(REU-N2934FF-US)
RU130i
(REU-N2024FF-US)
PVC/CPVC Common Venting Installation Instructions
Common Vent Maximum Equivalent Vent Length
Rinnai Common Vent System or Schedule 40 PVC/CPVC
Max
# Water
System
Heaters
BTU/HR
Vent Diameter
2 398,000
3 597,000
4 796,000
5 995,000
6 1,194,000
7 1,393,000
8 1,592,000
9 1,791,000
10 1,990,000
11 2,189,000
12 2,388,000
2 320,000
3 480,000
4 640,000
5 800,000
6 960,000
2 360,000
3 540,000
4 720,000
5 900,000
6 1,080,000
7 1,260,000
8 1,440,000
9 1,620,000
10 1,800,000
11 1,980,000
12 2,160,000
2 260,000
3 390,000
4 520,000
5 650,000
6 780,000
HEADER DIAMETER
3 in.
3 in. 4 in.
Vent Diameter
65 ft
150 ft
65 ft
90 ft 150 ft
100 ft
65 ft
65 ft
150 ft
65 ft
90 ft 150 ft
100 ft
65 ft
Header Vent Length
4 in.
6 in.
Vent Diameter Vent Diameter
150 ft
70 ft
150 ft
150 ft
70 ft
150 ft
6 in.
6 in.
150 ft
90 ft
41 ft
150 ft
150 ft
90 ft
41 ft
150 ft
9