SYSTEM OPERATION
18
Vent Pipe
Use alternate vent
& combination
air locations
Combustion Air Pipe
Field Supplied
Drain Tee on Vent Pipe
Condensate trapped
to prevent flue gas from escaping
and routed to field supplied
condensate disposal
1/4” per foot min.
slope to furnace
6’ Max.
Floor
Basem
ent / C
rawlsp
ace
DOWN VENTING UPFLOW MODEL FURNACES ONLY
All piping and fittings must be joined per material manufacturers specifications
to prevent separation and flue gas leaks.
Figure 12
COMBUSTION AIR INTAKE
(OPTIONAL)
*Not required for
single pipe installation
TEE (OPTIONAL)
96
”
MA
X. -
3”
MIN
.
R
OOF
LIN
E
12” MIN
HEIGHT DIFFERENCE
BETWEEN
INTAKE AND VENT
12” MIN TO ROOF OR HIGHEST
ANTICIPATED SNOW LEVEL
Figures 13
Figure 17
STRAIGHT
ELBOWS
Figure 14
Figure 16
Figure 18
Vent/Flue and Combustion Air Pipe Terminations
Termination of Multiple Direct Vent Furnaces
Figure 18
3” MIN
12” MIN TO GRADE OR HIGHEST
ANTICIPATED SNOW LEVEL
3”MIN
24”MAX
12” MIN SEPARATION
Figure 19
The vent/flue and combustion air pipes may terminate vertically,
as through a roof, or horizontally, as through an outside wall.
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 units as with the exhaust vent and air intake terminations
of a single unit.
If more than one direct vent furnace is to be installed horizontally
through a common side wall, maintain the clearances as in the
following figure. Always terminate all exhaust vent outlets at the
same elevation and always terminate all air intakes at the same
elevation.
Concentric Vent Termination
Refer to the directions provided with the Concentric Vent Kit
(DCVK) for installation specifications.
Side Wall Vent Kit
This kit is to be used with 2” or 3” direct vent systems. The vent
kit must terminate outside the structure and may be installed
with the intake and exhaust pipes located side-by-side or with
one pipe above the other. These kits are
NOT
intended for
use with single pipe (indirect vent) installations.
Refer to the directions furnished with the Side Wall Vent
Kit (p/n 0170K00000S or 0170K00001S) for installation
specifications.
Ve rtica l Insta llation
H orizontal Installation
Side Wall Vent Kit
Figure 19
Figure 20
