Install Instructions

17
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.
NOTE: For installations at or above 7,000 feet altitude,
use 3” venting.
VENT/FLUE P IPE TERMINATIONS
12" MIN.
VENT/FLUE TEE (
or
45° ELBOW
TURNED DOWN or
90° ELBOW TURNED
DOWN
OPTIONAL)
Horizontal Termination (Single Pipe)
Above Highest Anticipated Snow Level
Figure 12
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 re-
strictions. 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. TO GRADE OR
HIGHEST ANTICIPATED
SNOW LEVEL
6” MAX
4” MIN
Standard Horizontal Terminations (Dual Pipe)
Figure 16
DIRECT VENT (DUAL PIPE) PIPING
Direct vent installations require both a combustion air intake
and a vent/flue pipe. The pipes may be run horizontally and
exit through the side of the building or run vertically and exit
through the roof of the building. The pipes may be run through
an existing unused chimney; however, they must extend a
minimum of 12 inches above the top of the chimney. The
space between the pipes and the chimney must be closed with
a weather tight, corrosion resistant flashing. Both the com-
bustion air intake and a vent/flue pipe terminations must be
in the same atmospheric pressure zone. Refer to Vent/Flue
and Combustion Air Pipe - Termination Locations or Concen-
tric Vent Termination for specific details on termination con-
struction. For details concerning connection of pipes to the
furnace, refer to the Vent/Flue Pipe and Combustion Pipe -
Standard Furnace Connections or Alternate Furnace Connec-
tions.
90°
ELBOWS
3” - 24”
Alternate Horizontal Vent Termination (Dual Pipe)
Figure 17