37
Ve
ntin
g
OPTIONAL TERMINATION ANGLES FOR OPTION FOR ALT. HORIZ. AND VARIANT OF ALT.
HORIZ. DIRECT-VENT TERMINATIONS (OPTIONS 4 &5)
DIRECT VENT (cont.)
GENERAL VENTING REQUIREMENTS AND
GUIDELINES
FIGURE 22
1, 4
2
3
5
NOTE:
THESE OPTIONAL TERMINATION ANGLES
APPLY ONLY TO DIRECT-VENT TERMINATION OP-
TIONS 4 AND 5 ABOVE (ALTERNATE HORIZONTAL
AND VARIANT OF OPTIONAL HORIZONTAL) IN THIS
SECTION. DO NOT USE THESE ANGLED TERMINA-
TIONS WITH ANY OTHER TERMINATION OPTION.
NOTE:
This option is recommended for installations
where the distance from the vent pipe perpendicular to an-
other structure is less than 10 feet.
TOP VIEW FOR USING 22° OR 45° TERMINATION ON A
SINGLE FURNACE
USING ALTERNATE VENT TERMINATIONS FROM OP-
TIONS 4 OR 5 ABOVE, SIMPLY ROTATE THE FINAL EL-
BOWS 22 OR 45 DEGREES FROM THE WALL AS
SHOWN ABOVE.
1. BOTH THE COMBUSTION AIR AND EXHAUST
FINAL TERMINATION ELBOWS MUST BE AT THE
SAME ANGLE AND FACE THE SAME DIRECTION
(LEFT OR RIGHT).
2. A WIND VANE MUST BE INSTALLED IN THE COM-
BUSTION AIR INLET PIPE AS SHOWN IN THE DIA-
GRAM.
3. NUMBER AND DISTANCE BETWEEN (RECOM-
MENDED) SUPPORT STRAPS MUST PROVIDE
RIGID SUPPORT.
4. MARK THE FINAL (22° OR 45°) ANGLES ON THE
TOP OF THE VERTICAL RISERS AND FINAL EL-
BOWS BEFORE GLUING INTO PLACE TO ENSURE
THAT THE FINAL ANGLES ARE CORRECT.
5. INSULATING THE EXHAUST TERMINATION VERTI-
CAL RISER MAY BE NECESSARY IN SOME AREAS,
DEPENDING ON THE TOTAL LENGTH AND EX-
PECTED TEMPERATURES IN THE AREA.
6. DO NOT ANGLE (22° OR 45°) INTO AN INSIDE COR-
NER.
7. DO NOT USE SCREENS ON THE INLET OR EX-
HAUST PIPES.
8. ANGLED TERMINATIONS CANNOT BE USED ON
PAIRS OF VENTS.
9. THIS TERMINATION MAY CAUSE DISCOLORATION
OVER TIME TO THE EXTERNAL SURFACE OF THE
STRUCTURE.
10. WALL PENETRATIONS AND VENT TERMINATIONS
MUST BE WITH 2”
PIPE TO REDUCE THE POSSI-
BILITY OF ICE FORMING AT THE TERMINATION. A
MAXIMUM OF 18” OF 2”
PIPE IS PERMITTED IN-
SIDE (BEFORE THE PENETRATION) WHEN USING
3”
VENT.
ST-A1194-20
