GMEC96 Installation Manual

19
zone. Refer to Vent/Flue and Combustion Air Pipe - Termi-
nation Locations or Concentric Vent Termination
details on termination construction. For details concerning
connection of pipes to the furnace, refer to the Vent/Flue
Pipe and Combustion Pipe - Standard Furnace Connections
or Alternate Furnace Connections.
The number of elbows tabulated represents the number of
elbows and/or tees in each (Vent/Flue & Combustion Air
Intake) pipe. Elbows and/or tees used in the terminations
must be included when determining the number of elbows
in the piping systems.
If the combustion air intake pipe is to be installed above a

will be objectionable, insulation of the combustion air pipe
may be required. Use 1/2” thick closed cell foam insulation

90º OR 45°
ELBOW
12" MIN. TO GRADE OR
HIGHEST ANTICIPATED
SNOW LEVEL
6” MAX
10”- 24”
4” MIN

Figure 15
90°
ELBOWS
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
3” - 24”

Figure 16
90°
ELBOWS
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
3”-24” BETWEEN PIPES
Combustion Air Intake may also be snorkeled to obtain 12” min ground
clearance.
Alternate Vent Termination Above Anticipated Snow Level

Figure 17

-
ly, as through a roof, or horizontally, as through an outside wall.
Vertical pipe terminations should be as shown in the follow-
Refer to Vent/Flue Pipe and Combustion Pipe
- Termination Locations for details concerning location
restrictions. The penetrations through the roof must be
          
plastic plumbing vent.


Center to center = 10” min / 24” max. Vertical separation:
0” - 24”
Vent termination from wall = 8” min / 12” max.
Combustion air intake from wall = 6” max.
Vent and intake clearance to ground
or anticipated snow level = 12” min.


If more than one direct vent furnace is to be installed verti-
cally through a common roof top, maintain the same minimum
clearances between the exhaust vent and air intake termina-
tions of adjacent units as with the exhaust vent and air intake
terminations of a single unit.
If more than one direct vent furnace is to be installed horizon-
tally through a common side wall, maintain the clearances as in

at the same elevation and always terminate all air intakes at
the same elevation.