23
ELEVATED SINGLE PIPE ALTERNATE TEE TERMINATION
See Figure 16. The tee termination may be elevated up to 24 inches above the
wall penetration if required for anticipated snow levels. Use 2 medium-radius, 2-in.
PVC elbows and 2-in. PVC pipe, attaching the tee so it is 12 inches from the wall.
NON-DIRECT VENT
INSTALLATION
GUIDELINES
IMPORTANT:
Failure to correctly
follow all venting guidelines may
result in erratic furnace operation,
freeze-up of combustion air or
exhaust air piping or sooting of the
furnace.
All exhaust piping must be installed in
compliance with Part 7, “Venting of
Equipment,” of the latest edition of the
National Fuel Gas Code NPFA54/
ANSI Z223.1-, local codes or
ordinances and these instructions.
1. Vertical piping is preferred.
2. All horizontal piping must slope
upward a minimum of
1
/
4
inch
per foot of run so that
condensate drains toward the
furnace.
3. All horizontal runs must be
supported at least every 4 feet.
No sags or dips are permitted.
4.
IMPORTANT:
Do not common
vent with any other appliance. Do
not install in the same chase or
chimney with a metal or high
temperature plastic pipe from
another gas or fuel-burning
appliance unless the required
minimum clearances to
combustibles are maintained
between the PVC pipe and other
pipes.
5. All vent runs through
unconditioned spaces where
below-freezing temperatures are
expected should be insulated
with 1-in. thick, medium-density,
foil-faced fiberglass. An
equivalent “arm-a-flex” or
FIGURE 15
TEE TERMINAL – FOR STANDARD
HORIZONTAL SINGLE PIPE
INSTALLATION
FIGURE 16
ALTERNATE HORIZONTAL TERMINATION
FOR NON-DIRECT VENT
INSTALLATIONS
12
"
FR
OM
24"
MAX.
PIPE
SUPPORT
STRAP
OUTSIDE
WALL
VENT
12"
12" MIN. ABOVE
GRADE OR
SNOW LEVEL
I198
NUMBERS OF ELBOWS
45° OR 90°
Medium / Long Radius ONLY
1-2
3-4
5-6
45,000
2”
Standard
60
55
50
Alternate
55
50
45
2”
Standard
35
30
25
Alternate
30
25
20
60,000
3”
Standard
120
120
115
Alternate
120
120
110
2”
Standard
30
25
NR
Alternate
NR
NR
NR
75,000
3”
Standard
110
105
95
Alternate
80
70
65
90,000
3”
Standard
90
85
75
Alternate
60
50
45
105,000
3”
Standard
80
75
65
Alternate
50
40
35
120,000
3”
Standard
70
65
55
Alternate
40
30
25
NOTES:
1. *N.R. - NOT RECOMMENDED.
2. MAXIMUM OF 6 - 90 DEGREE ELBOWS MAY BE USED. DO NOT COUNT ELBOWS REQUIRED FOR
ALTERNATE TERMINATION. USE ONLY MEDIUM OR LONG SWEEP ELBOWS.
3. A 22
1
⁄
2
° or 45° DEGREE ELBOW IS CONSIDERED ONE ELBOW.
FURNACE
INPUT
VENT PIPE INSTALLATION
PIPE
SIZE
TERMINATION
TABLE 1
FOR NON-DIRECT VENT APPLICATIONS - AIR FOR COMBUSTION
PROVIDED FROM INDOORS
MAXIMUM ALLOWABLE LENGTH IN FEET OF EACH EXHAUST PIPE AND INTAKE PIPE
