Installation Guide
18
VENT/FLUE TEE (
or
45° ELBOW
TURNED DOWN or
90° ELBOW TURNED
DOWN
OPTIONAL)
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
12" MIN.
Above Highest Anticipated Snow Level
STRAIGHT
ELBOWS
COMBUSTION AIR INTAKE
(OPTIONAL)
*Not required for
single pipe installation
TEE (OPTIONAL)
9
6
”
M
A
X
.
-
3
”
M
I
N
.
R
O
O
F
L
I
N
E
12” MIN
HEIGHT
DIFFERENCE
12” MIN TO ROOF OR
HIGHEST ANTICIPATED
SNOW LEVEL
90º OR 45°
ELBOW
12" MIN. TO GRADE OR
HIGHEST ANTICIPATED
SNOW LEVEL
6” MAX
10”- 24”
4” MIN
Direct vent installations require both a combustion air intake
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
pipe terminations must be in the same atmospheric pressure
zone. Refer to Vent/Flue and Combustion Air Pipe - Termi-
nation Locations or Concentric Vent Termination
connection of pipes to the furnace, refer to the Vent/Flue
Pipe and Combustion Pipe - Standard Furnace Connections
or Alternate Furnace Connections.