Goodman GMH95 - Page 19

19
V
ENT/FLUE
COMBUSTION
AIR INTAKE
SCREEN
OPTIONAL
12" MIN. TO ROOF
OR HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN.
TEE (OPTIONAL)
Vertical Terminations (Dual Pipe)
Horizontal terminations should be as shown in the following fig-
ure. Refer to Section IX, Vent/Flue Pipe and Combustion Pipe -
Termination Location for location restrictions. A 2 3/8” diameter
wall penetration is required for 2” diameter pipe. A 3” diameter hole
is required for a 2 1/2” pipe and a 3 1/2” diameter hole is required
for 3” diameter pipe. To secure the pipe passing through the wall
and prohibit damage to piping connections, a coupling should be
installed on either side of the wall and solvent cemented to a pipe
connecting the two couplings. The pipe length should be the wall
thickness plus the depth of the socket fittings to be installed on the
inside and outside of the wall. The wall penetration should be
sealed with silicone caulking material.
SCREEN
(OPTIONAL)
90º or 45°
MEDIUM RADIUS
ELBOWS
12" MIN
3" MIN
24" MAX
3" MIN
24" MAX
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
Standard Horizontal Terminations (Dual Pipe)
_______________
24" MAX
3" MIN
SCREEN
(OPTIONAL)
24" MAX
AIR
INTAKE
90°
MEDIUM
RADIUS
ELBOW
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
Alternate Horizontal Vent Termination (Dual Pipe)
SUPPORT
STRAPS
V
ENT/FLUE
TEE (OPTIONAL)
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
90° or 45°
MEDIUM RADIUS
ELBOWS
SCREEN
(OPTIONAL)
COMBUSTION
AIR INTAKE
12" MIN
3" MIN
24" MAX
Standard Horizontal Terminations Above Anticipated Snow
Level (Dual Pipe)
Alternate Vent Termination Above Anticipated Snow Level
(Dual Pipe)
In a basement installation, the pipes may be run between the joist
spaces. If the pipes must go below the joist and then up into the
last joist space to penetrate the header, two 45° elbows should be
used to reach the header rather than two 90° elbows.
VENT/INTAKE T ERMINATIONS F OR I NSTALLATION OF M ULTIPLE
DIRECT VENT FURNACES
If more than one direct vent furnace is to be installed vertically
through a common roof top, maintain the same minimum clear-
ances between the exhaust vent and air intake terminations 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 horizontally
through a common side wall, maintain the clearances as in the
following figure. Always terminate all exhaust vent outlets at the
same elevation and always terminate all air intakes at the same
elevation.