15
B
E
SURE
NOT
TO
DAMAGE
INTERNAL
WIRING
OR
OTHER
COMPONENTS
WHEN
REINSTALLING
COUPLING
AND
SCREWS
.
CAUTION
NON-DIRECT VENT (SINGLE PIPE) PIPING
Non-direct vent installations require only a vent/flue pipe.
The vent pipe can be run horizontally with an exit through
the side of the building or run vertically with an exit through
the roof of the building. The vent can also be run through
an existing unused chimney; however, it must extend a
minimum of 12 inches above the top of the chimney. The
space between the vent pipe and the chimney must be closed
with a weather-tight, corrosion-resistant flashing.
Although non-direct vent installations do not require a
combustion air intake pipe, a minimum of one 90° elbow
should be attached to the furnace’s combustion air intake
if: an upright installation uses the standard intake location,
or a horizontal installation uses the alternate air intake
location. This elbow will guard against inadvertent blockage
of the air intake.
12345678
2 120 115 110 105 100 95 90 85
3 134 127 120 113 106 99 92 85
2 100 95 90 85 80 75 70 65
3 151 144 137 130 123 116 109 102
2 4540353025201510
3113106999285787164
2 706560555045N/AN/A
3 8982756861544740
2 N/A N/A N/A N/A N/A N/A N/A N/A
3 120 113 106 99 92 85 78 71
2 N/A N/A N/A N/A N/A N/A N/A N/A
3 151 144 137 130 123 116 109 102
2 N/A N/A N/A N/A N/A N/A N/A N/A
3 151 144 137 130 123 116 109 102
2 120 115 110 105 100 95 N/A N/A
3 185 178 171 164 157 150 143 136
2 8580757065605550
3 168 161 154 147 140 133 126 119
2 40353025201510 5
3 120 113 106 99 92 85 78 71
2 N/A N/A N/A N/A N/A N/A N/A N/A
3113106999285787164
2 N/A N/A N/A N/A N/A N/A N/A N/A
3 151 144 137 130 123 116 109 102
DM 96VC0403BN
DM96VC & DC96VC Direct Vent (2 - Pipe) and Non-Direct Vent (1- Pipe)
(6)
Maximum Allowable Length of Vent/Flue Pipe
MODEL
Pipe Size
(4)
(in.)
Number of Elbows
(3) (5)
DC96VC0603BN
DC96VC0804CN
DC96VC1005CN
DC96VC1205DN
DM 96VC0603BN
DM 96VC0803BN
DM 96VC0804CN
DM 96VC1005CN
DM 96VC1205DN
DC96VC0403BN
DM 96VC1005DN
VENT/FLUE PIPE LENGTHS AND DIAMETERS
NOTE: For installations at or above 7,000 feet altitude, use
3” venting. If either a 90 degree or 45 degree elbow is used
for termination, it must be pointed downward.
Refer to the following table for applicable length, elbows,
and pipe diameter for construction of the vent/flue pipe
system of a non-direct vent installation. In addition to the
vent/flue pipe, a single 90° elbow should be secured to the
combustion air intake to prevent inadvertent blockage. The
tee used in the vent/flue termination must be included when
determining the number of elbows in the piping system.
1) Maximum allowable limits listed on individual lengths
for inlet and flue and NOT a combination.
2) Minimum requirement for each vent pipe is five (5)
feet in length and one elbow/tee.
3) Tee used in the vent/flue termination must be included
when determining the number of elbows in the piping
system
4) 2 1/2” or 3” diameter pipe can be used in place of 2”
diameter pipe.
5) Increased Clearance Configurations using (2) 45 deg.
Long Sweep elbows should be considered equivalent to
one 90 deg. elbow.
6) One 90° elbow should be secured to the combustion air
intake connection.
7) For installations at or above 7,000 feet altitude, use
3” venting.
Vent/Flue Pipe Terminations
NOTE: If either a 90 degree or 45 degree elbow is used for
termination, it must be pointed downward.
The vent/flue pipe may terminate vertically, as through a
roof, or horizontally, as through an outside wall.
Vertical vent/flue pipe terminations should be as shown in
the following figure. Refer to Vent/Flue Pipe and Combustion
Air Pipe - Termination Locations for details concerning
location restrictions. The penetration of the vent through
the roof must be sealed tight with proper flashing such as is
used with a plastic plumbing vent.
Horizontal vent/flue pipe terminations should be as shown
in the following figure. Refer to Vent/Flue Pipe and
Combustion Air 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 length of pipe connecting the two 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.
NOTE: Terminate both pipes in the same pressure zone
(same side of roof, no major obstacles between pipes,
etc.).
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN.
ENT/FLUE TEE (
or
45° ELBOW
TURNED DOWN or
90° ELBOW TURNED
DOWN
OPTIONAL)
Horizontal Termination (Single Pipe)
Above Highest Anticipated Snow Level
Figure 15
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