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14. Use appropriate methods to seal openings where vent and combustion-air pipes pass through roof or side wall.

Concentric Vent and Combustion-Air Termination Kit Installation

NOTE:

If these instructions differ from those packaged with termination kit, follow kit instructions.

Combustion-air and vent pipes must terminate outside structure. A factory accessory termination kit must be installed in 1 of the installations
shown in Fig. 40, 41, 42, 43, and 44. Four termination kits are available.

1. The 2-in. termination bracket kit is for 1-in., 1-1/2 in., and 2-in. diameter 2-pipe termination systems.

2. The 3-in. termination bracket kit is for 2-1/2 in., 3-in., and 4-in. diameter 2-pipe termination systems.

3. The 2-in. concentric vent/air termination kit is for 1-in., 1-1/2 in., 2-in., and 2-1/2 in. diameter pipe systems when single penetration of wall

or roof is desired.

4. The 3-in. concentric vent/air termination kit is for 2-1/2 in., 3-in., and 4-in. diameter pipe systems when single penetration of wall or roof

is desired.

NOTE:

Shaded parts in Fig. 40, 41, 42, 43, and 44 are considered to be termination. These components should NOT be counted when determining

pipe diameter. Roof termination is preferred since it is less susceptible to damage, has reduced chances to take in contaminants, and has less visible
vent vapors. (See Fig. 40 or 41.) Sidewall termination may require sealing or shielding of building surfaces with a corrosive resistance material
due to corrosive combustion products of vent system.

EXTENDED EXPOSED SIDEWALL PIPES

Sidewall combustion-air and vent pipe terminations may be extended beyond area shown in Fig. 43 or 44 in outside ambient by insulating pipes
as indicated in Table 10.

1. Determine combustion-air and vent pipe diameters, as stated above, using total pipe length and number of elbows.

2. Using winter design temperature (used in load calculations), find appropriate temperature for your application and furnace model.

3. Determine required insulation thickness for exposed pipe lengths.

NOTE:

Pipe length (ft) specified for maximum pipe lengths located in unconditioned spaces cannot exceed total allowable pipe length as specified

in Table 9.

TWO-PIPE TERMINATION KIT

1. Determine location for termination.

Consideration of the following should be made when determining an appropriate location for termination kit:

a. Comply with all clearance requirements as stated in Table 7.

b. Termination kit should be positioned where vent vapors will not damage plants/shrubs or air conditioning equipment.

c. Termination kit should be positioned so that it will not be affected by wind eddy (such as inside building corners) or allow recirculation

of flue gases, airborne leaves, or light snow.

d. Termination kit should be positioned where it will not be damaged by or subjected to foreign objects, such as stones, balls, etc.

e. Termination kit should be positioned where vent vapors are not objectionable.

2. Cut 2 holes, 1 for each pipe, of appropriate size for pipe size being used.

3. Loosely install elbow in bracket and place assembly on combustion-air pipe.

Roof terminations—Loosely install pipe coupling on properly cut vent pipe. Coupling must be positioned so bracket will mount as shown
in Fig. 40.

For applications using combustion-air pipe option, indicated by dashed lines in Fig. 40, install 90° street elbow into 90° elbow, making
U-fitting. A 180° U-fitting may be used.

Sidewall terminations—Install bracket as shown in Fig. 43 or 44.

Fig. 39—Intake Housing Plug Fitting Drain

A96190

COMBUSTION–
AIR PIPE

BURNER
BOX

COMBUSTION–AIR
INTAKE HOUSING

3/8

″

ID TUBE

TRAP

TO OPEN

DRAIN