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650.75-N4U
SOFFIT
VENTS
6'
10' RECOMMENDED
ELECTRIC
METER
FURNACE VENT
INSIDE
CORNER
FIGURE 25 : VENT TERMINAL CLEARANCES
(1-PIPE SYSTEM) - U.S. ONLY
4.
6 feet from any inside corner formed by two exterior
walls. 10 feet is recommended where possible.
5.
At least 4 feet horizontally from any soffit or undereave
vent.
6.
10 feet from any forced air inlet to the building. Any fresh
air or make up inlet as for a dryer or furnace area is con-
sidered to be a forced air inlet.
7.
Avoid areas where condensate drippage may cause
problems such as above planters, patios, or adjacent to
windows where steam may cause fogging.
NOTE : Consideration must be given for degradation of build-
ing materials by flue gases.
NOTE : Shaded components of the vent system shown in Fig-
ure 25 through Figure 28 are considered to be termination.
These components should not be counted when determining
pipe diameter. Sidewall termination may require sealing or
shielding of building surfaces with a corrosive resistant mate-
rial due to vent system corrosive combustion products.
22
4'
4'
4'
4'
4'
FRESH AIR
INTAKE
3'
4'
10'
1' PLUS
SNOW CLEARANCE
12"
VENT ELBOW
FIGURE 26 : HORIZONTAL TERMINATION CON-
FIGURATION WITH 12" MINIMUM
CLEARANCE
12" MINIMUM
90°
VENT
FIGURE 27 : HORIZONTAL TERMINATION RAISED
CONFIGURATION FOR ADDITIONAL
CLEARANCE
VENT
FIGURE 28 : ROOFTOP TERMINATION
035-14370-000
MAINTAIN 12" CLEARANCE ABOVE
HIGHEST ANTICIPATED SNOW LEVEL
OR GRADE, WHICHEVER IS GREATER
MAINTAIN 12" CLEARANCE ABOVE
HIGHEST ANTICIPATED SNOW LEVEL
OR GRADE, WHICHEVER IS GREATER
MAINTAIN 12" MINIMUM
CLEARANCE ABOVE HIGHEST
ANTICIPATED SNOW LEVEL.
MAXIMUM OF 24" ABOVE ROOF
Unitary Products Group
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