Max Vent length runs with
PP single pipe
recommends using 3” polypropylene venting, however 2” venting is permitted. In Table 1.2 the
max vent lengths are outlined. Each elbow, whether it is a 45° or 90° elbow, are the equivalent of 5ft straight length
pipe. We recommend no more then five elbows total on exhaust pipe..
Table 1.2 Maximum Single Pipe length determination (combined lengths. Exhaust vent pipe should not
exceed ½ these distances, ie.
2” max length is 105 ft, so exhaust should not be longer then 52ft)
Number of Elbows and Equivalent Feet
Connection
Length
1
2
3
4
5
6
7
8
9
10
type
2” (60mm)
combined
105 ft
100 ft
95 ft
90 ft
85 ft
80 ft
75 ft
70 ft
65 ft
60 ft
55 ft
Vent Length
3” (80mm)
Combined
vent
length
164ft
159 ft
154 ft
149ft
144 ft
139 ft
134 ft
129 ft
124 ft
119 ft
114 ft
General Install Note for single wall venting on
boilers:
You must use only authorized ULC S-636 vent parts in order to maintain a safe, approved system. Do not mix parts
or try to match with other products or use improvised solutions. Do not use any solvents or adhesives with single
wall PP pipe, other than as specified.
For horizontal runs, always maintain at least a 0.25
” per foot rise away
from the boiler when using CPVC/PVC and 0.5” per foot when using PP
. This prevents collection of condensate
or build-up of heat in the vent. It is recommended to use a bird screen on roof or sidewall single wall terminations.
**For i
nstallations using PVC exhaust vent, the first seven (7) equivalent feet of vent must be CPVC.”
33
Figure 2
Air intake of a two pipe system after white
cap is removed. It is on the right side of boiler
Figure 3
Using black o-ring to block air intake of concentric
connection. Only use exhaust connection shown here. It
is on left side of the boiler
Figure 4
After O-rings are installed, connect polypropylene
venting as pictured. Use
3” or if short vent length,
reduce to 2” as seen in picture. See vent chart
below for max vent lengths.
R Series
Gasmaster
R Series
R Series