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VENTING & AIR INLET PIPING
7. Vertical Venting Configuration:
a. Figure 3.7 shows the approved venting
configuration for vertical venting using the
standard fittings supplied.
Figure 3.7
Figure 3.8
8
b. Locate the air intake pipe inlet 12" above the
expected snow accumulation on the roof surface
or 24" above the roof surface, whichever is greater.
c. Locate the end of the exhaust vent pipe a minimum
of 12" above the inlet to the air intake pipe.
d. Figure 3.8 shows an approved vertical vent
configuration using the optional concentric vent
termination kit.
8. Exhaust Vent Pipe Location – Vertical Venting:
a. Figures 3.5 and 3.6 show approved venting
configurations for vertical venting using the
standard fittings supplied.
b. Locate the end of the Exhaust Vent pipe a
minimum of 12" above the air inlet pipe.
D. EXHAUST VENT/AIR INTAKE PIPE SIZING
1. P
F
boiler models PF-50, PF-80, PF-110 and PF-
URE
IRE
140 are to be installed using 3" Schedule 40 or 80
PVC or CPVC piping using the provided vent adapter.
2. A concentric polypropylene vent system can be
installed using the optional MUGROTM vent adapter
(54155). Contact your PB Heat, LLC representative
for more information on this option.
3. The total combined length of exhaust vent and air
intake piping is 200 equivalent feet (60 m).
a. The equivalent length of elbows, tees and other
fittings are listed in Table 3.2.
Table 3.2: Equivalent Length of Fittings
Fitting Description
Elbow, 90° Short Radius
Elbow, 90° Long Radius
Elbow, 45° Short Radius
Coupling
Air Intake Tee
Stainless Steel Vent Kit
Concentric Vent Kit
b. The equivalent length can be calculated as follows.
Table 3.3: Sample Equivalent Length Calculation
Exhaust
Straight Length of Pipe
90° Elbows, SR
2 x 5'= 10'
45° Elbows, SR
Conc. Vent Termination
This is well below the 200 feet maximum
equivalent length. If the total is above 200
equivalent feet, alternate boiler locations or
exhaust penetration location should be considered.
E. EXHAUST VENT/AIR INTAKE PIPE
INSTALLATION
1. Figure 12.1 shows the 3" exhaust connection at the
center of the boiler.
2. The Air Intake connection is to the right of the exhaust.
Equivalent Length
5 feet
4 feet
3 feet
0 feet
0 feet
1 foot
3 feet
Air Inlet
Total
50'
50'
100'
1 x 5' = 5'
15'
2 x 3' = 6'
6'
1 x 3' = 3'
3'
Total
124'
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