INSTALLATION CONSIDERATIONS
19
90°
ELBOWS
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
3” - 24”
Alternate Horizontal Vent Termination (Dual Pipe)
90°
ELBOWS
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
3”-24” BETWEEN PIPES
Combustion Air Intake may also be snorkeled to obtain 12” min ground
clearance.
Alternate Vent Termination Above Anticipated Snow Level
(Dual Pipe)
12" MINIMUM
VENT/FLUE TEE
OR
90° ELBOW TURNED
DOWN
12" MINIMUM ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
90% Furnace Horizontal Termination
(Single Pipe)
Above Highest Anticipated Snow Level
In a basement installation, the vent/flue pipe can be run be
-
tween joist spaces. 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.
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
combustion 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
section in this manual or the installation
instructions for specific details on termination construction.
Concentric Vent Kits (DCVK) Application
The DCVK-20 and DCVK-30 kit is designed to allow the termi
-
nations of a direct vent furnace to be “concentrically” vented
through a wall or roof. This kit allows a single penetration
to support terminations for both the vent/flue pipe and the
combustion air intake pipe.
(DCVK) Vent Termination Clearances
1. Determine termination locations based on clearances
specified in furnace installation instructions, and following
steps as shown in Figures 1,3,6,7,8 and 9.