![Fig. 43—Sidewall Termination of Less than 12 in.](/images/new-backgrounds/47908/4790877x1.webp)
OVERHANG OR ROOF | |
12″ MINIMUM | |
VENT |
|
90¡ |
|
BRACKET |
|
COUPLING |
|
| 12 IN. SEPARATION |
| BETWEEN BOTTOM OF |
| COMBUSTION AIR AND |
| BOTTOM OF VENT |
| MAINTAIN 12 IN. |
| CLEARANCE |
| ABOVE HIGHEST |
| ANTICIPATED SNOW |
LEVEL OR GRADE, | |
(ELBOW PARALLEL | WHICHEVER IS |
TO WALL) | GREATER. |
A87226
Fig. 43—Sidewall Termination of Less than 12 in.
NOTE: Shaded parts in Fig. 39, 40, 41, 42, and 43 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. 39 or 40.) 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
1.Determine
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. Pipes located in unconditioned space cannot exceed total allowable pipe length as specified in Table 7.
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 5.
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
Roof
For applications using
Sidewall
For applications using vent pipe option indicated by dashed lines in Fig. 42, rotate vent elbow 90° from position shown in Fig. 42.
4.Disassemble loose pipe fittings. Clean and cement using same procedures as used for system piping.
5.Check required dimensions as shown in Fig. 39, 42, or 43.
CONCENTRIC VENT/AIR 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 5.