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=VENT TERMINAL | X | =AIR SUPPLY INLET | 23=AREA WHERE TERMINAL IS NOT PERMITTED | |||
A | = 12" | clearances above grade, veran- |
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| da, porch, deck or balcony |
B= 12" .................... clearances to window or door that may be opened
C= 9" (U.S.A.)
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| 12" (Canada) | clearance to permanently |
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| closed window. |
*D | = | 18" | vertical clearance to ventilated |
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| soffit located above the termi- |
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| nal within a horizontal distance |
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| of 2 feet (60 cm) from the cen- |
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*E | = | 18" | clearance to unventilated soffit |
F | = | 9" | clearance to outside corner |
G | = | 6" | clearance to inside corner |
H | = | 3 ft. (Canada) .... | not to be installed above a gas |
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| meter/regulator assembly with- |
in 3 feet (90cm) horizontally from the
I= 3 ft. (U.S.A.)
6 ft. (Canada) ..... clearance to service regu-
lator vent outlet.
J= 9" (U.S.A.)
12" (Canada) ..... clearance to
ical air supply inlet to building or the combustion air inlet to any other ap- pliance
K | = | 3 ft. (U.S.A.) |
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| 6 ft. (Canada) | clearance to a mechanical |
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| air supply inlet |
**L | = | 7 ft | clearance above paved |
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| sidewalk or a paved drive- |
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| way located on public |
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| property |
***M = | 18" | clearance under veranda, | |
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| porch, deck or balcony |
*30” minimum for vinyl clad soffits.
**a vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves both dwellings.
***only permitted if veranda, porch, deck or balcony is fully open on a minimum of 2 sides beneath the floor. NOTE: Local codes or regulations may require different clearances.
Figure 21. Vent Termination Minimum Clearances
CAUTION: IF EXTERIOR WALLS ARE FINISHED WITH VINYL SIDING, IT IS NECESSARY TO INSTALL THE VINYL PROTECTOR KIT TO THE TOP OF THE EXTERIOR FIRESTOP (FOR ALL ROUND TERMINATION CAPS).
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