ELEVATED SINGLE PIPE ALTERNATE TEE TERMINATION
See Figure 15. 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.
17
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-, CAN/CGA-B149, 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 uncon-
ditioned 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 14
TEE TERMINAL – FOR
STANDARD HORIZONTAL
SINGLE PIPE INSTALLATION
FIGURE 15
ALTERNATE HORIZONTAL
TERMINATION FOR
NON-DIRECT VENT
INSTALLATIONS
12"
FROM
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 20 15 10
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 45° DEGREE ELBOW IS CONSIDERED ONE ELBOW.
FURNACE
INPUT
➤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
VENT PIPE INSTALLATION
PIPE
SIZE
TERMINATION
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