Goodman GCV9 Series, Installation Instructions Manual, Page: 18 / 40

18
V
ENT
/F
LUE AND
C
OMBUSTION
A
IR
P
IPE
T
ERMINATIONS
The vent/flue and combustion air pipes may terminate vertically, as
through a roof, or horizontally, as through an outside wall.
Vertical pipe terminations should be as shown in the following fig-
ure.
Refer to Section IX, Vent/Flue Pipe and Combustion Pipe -
Termination Locations for details concerning location restrictions.
The penetrations through the roof must be sealed tight with proper
flashing such as is used with a plastic plumbing vent.
12" MIN.
12" MIN.
TO ROOF OR
HIGHEST
ANTICIPATED
SNOW LEVEL
VENT/FLUE
COMBUSTION
AIR INTAKE
SCREEN
Vertical Terminations (Dual Pipe)
Horizontal terminations should be as shown in the following figure.
Refer to
Section IX, Vent/Flue Pipe and Combustion Pipe - Termi-
nation Location for location restrictions. A 2 3/8 inch diameter wall
penetration is required for 2” diameter pipe while a 3 1/2 inch diam-
eter hole is required for 3” diameter pipe. To secure the pipe pass-
ing 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 penetra-
tion should be sealed with silicone caulking material.
12" MIN
3" MIN
24" MAX
3" MIN
24" MAX
12" MIN.
TO ROOF OR
HIGHEST
ANTICIPATED
SNOW LEVEL
12" MIN.
TO ROOF OR
HIGHEST
ANTICIPATED
SNOW LEVEL
Standard Horizontal Terminations (Dual Pipe)
24" MAX
3" MIN
24" MAX
AIR
INTAKE
90°
MEDIUM
RADIUS
ELBOW
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
Alternate Horizontal Vent Termination (Dual Pipe)
SUPPORT
STRAPS
12" MIN.
VENT/FLUE
TEE
SCREEN
COMBUSTION
AIR INTAKE.
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
3" MIN.
24" MAX.
12" MIN
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.
V
ENT
/I
NTAKE
T
ERMINATIONS
F
OR
I
NSTALLATION OF
M
ULTIPLE
D
IRECT
V
ENT
F
URNACES
If more than one direct vent furnace is to be installed vertically through
a common roof top, maintain the same minimum clearances be-
tween 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 fol-
lowing figure. Always terminate all exhaust vent outlets at the same
elevation and always terminate all air intakes at the same elevation.
Vents
24" Max.
3" Min.
12" Min.
Screen
24" Max.
90°
Medium
Radius
Elbows
24" Max.
3" Min.
3" Min.
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
Horizontal Venting Of Multiple Units
C
ONCENTRIC
V
ENT
T
ERMINATION
Refer to the directions provided with the Concentric Vent Kit (DCVK)
for installation specifications.