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Vent/Intake Terminations For Installation Of Multiple Direct Vent Furnaces - Whirlpool WGFD293 Installation Instructions Manual

93% and 95% 2-stage variable speed gas furnace
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Horizontal terminations should be as shown in "Standard
Horizontal Vent Terminations (Dual Pipe)" illustration. Refer to
"Termination Locations" in this section for location restrictions.
A 2³⁄₈" (6.1 cm) diameter wall penetration is required for 2"
(5.1 cm) diameter pipe.
A 3" (7.6 cm) diameter hole is required for a 2¹⁄₂" (6.4 cm)
pipe.
A 3¹⁄₂" (8.9 cm) diameter hole is required for 3" (7.6 cm)
diameter pipe.
To secure the pipe passing through the wall and prohibit
damage to the piping connections, a coupling should be
installed on either side of the wall and solvent cemented to a
length of pipe connecting the 2 couplings.
The length of pipe 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.
Standard Horizontal Vent Terminations (Dual Pipe)
A
G
F
A. 24" (61 cm) maximum, 3"
(7.6 cm) minimum
B. 12" (30.5 cm) minimum from
wall
C. Tee or 90º elbow turned
down
Alternate Horizontal Vent Terminations (Dual Pipe)
H
A. 90º medium radius elbow
B. Flue/vent pipe
C. 12" (30.5 cm) minimum
from wall
D. Screen
B
A
C
E
D
D
D. 12" (30.5 cm) minimum to roof or
highest anticipated snow level
E. Combustion air intake
F. Screen
G. 90º medium radius elbow
B
A
C
G
F
D
E
E. 12" (30.5 cm) minimum to roof or
highest anticipated snow level
F. Combustion air intake
G. 24" (61 cm) maximum, 3" (7.6 cm)
minimum
H. 24" (61 cm) maximum radius
Standard Horizontal Terminations (Dual Pipe)—Above
Highest Anticipated Snow Level
A
H
G
A. Support straps
B. 24" (61 cm) maximum, 3"
(7.6 cm) minimum
C. 12" (30.5 cm) minimum from wall
D. Tee or 90º elbow turned down
Alternate Horizontal Terminations (Dual Pipe)—Above
Highest Anticipated Snow Level
G
F
E
A. 90º medium radius elbow
B. Flue/vent pipe
C. 24" (61 cm) maximum, 3"
(7.6 cm)
In a basement installation, the vent/flue pipe can be run
between joist spaces.
NOTE: If the vent pipe must go below a 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 Terminations for Installation of
Multiple Direct Vent Furnaces
If more than one direct vent furnace is to be installed vertically
through a common roof top, maintain the same minimum
clearances between the exhaust vent and air intake terminations
of adjacent furnaces as with the exhaust vent and air intake
terminations of a single furnace.
If more than one direct vent furnace is to be installed horizontally
through a common side wall, maintain the clearances as shown
in "Horizontal Venting of Multiple Furnaces" illustration. Always
terminate all exhaust vent outlets at the same elevation and
always terminate all air intakes at the same elevation.
C
B
D
F
E
E
A
E. 12" (30.5 cm) minimum to roof or
highest anticipated snow level
F. Screen
G. 90º medium radius elbow
H. Combustion air intake
A
B
D
C
D. Combustion air intake
E. 12" (30.5 cm) minimum to roof or
highest anticipated snow level
F. 24" (61 cm) maximum radius
G. Screen
19

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