ICP 9MPT - Vent Termination Standards; Single Piping Chart; Dual Piping Chart; Concentric Vent Termination

Two- Stage Multi Position Furnace
Service
Manual
14
440 08 2002 02
DUAL CERTIFIED models require a combustion air inlet
pipe to bring in all air for combustion from outside the struc-
ture only when installed as a Direct Vent Furnace (I.E. Two
Pipe Installation)
Consult the appropriate Venting tables and/or piping chart
for the model (series) you are servicing.
16. STANDARD VENT TERMINATION
Vent/Combustion Air Piping Charts
Single Piping Chart
Table 4
Pipe Diameter Table
Single Piping ONLY
50,000 & 75,000 Btuh Furnaces
40¢ & (5) 90° elbows with 2² PVC pipe
100,000 & 125,000 Btuh Furnace
40¢ & (5) 90° elbows with 3² PVC pipe
Elbows are DWV Long Radius Type for 2² and 3² vents.
If more than five elbows are required, reduce the length of both
the inlet and exhaust pipes 5¢ for each additional elbow used.
NOTE: It is allowable to use larger diameter pipe and fitting than
shown in the tables but not smaller diameters than shown.
Dual Piping Chart
Table 5
Pipe Diameter Table
Dual Piping ONLY
50,000 & 75,000 Btuh Furnaces
40¢ & (5) 90° elbows with 2² PVC pipe
100,000 & 125,000 Btuh Furnace
40¢ & (5) 90° elbows with 3² PVC pipe
Elbows are DWV Long Radius Type for 2² and 3² vents.
If more than five elbows are required, reduce the length of both
the inlet and exhaust pipes 5¢ (1.5m) for each additional elbow
used.
* Feet of pipe is whichever pipe run is the longest, either inlet or
outlet side.
Figure 15
Standard Termination
Rooftop Termination
25--00--06
A
A
B
A=12² Above roof or snow accumulation level
B=8² Min., 20¢ Maximum, except in areas with extreme
cold temperatures (sustained below 0°F), the 18² Min.
Inlet is optional on
Dual Certified models
Inlet is optional on
Dual Certified models
Figure 16
Sidewall Termination 12² or More
Above Snow Level or Grade Level
8² *
MIN.
20’
MAX
*18² Minimum for cold climates
(substained below 0° F)
25--00--05F
Figure 17
Concentric Vent and Combustion--
Air Roof Termination
“A”
Combustio n
Air
Exhaust
12²
²²
² Min. Grade
or Snow Level
Dimension “A” is touching or 2² maximum separation.
Figure 18
Concentric Vent and Combustion--
Air Sidewall Termination
“A”
Vent
Dimension “A” is touching or 2² maximum separation.
25--22--02d
Vent
Combustion Air
1²
²²
² Maximum
(TYP.)
Exhaust