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v | E |
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L | B |
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| v | B | (3 FT) |
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| v | I | M | v |
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(See Note 2)
V | = VENT TERMINAL | X = AIR SUPPLY INLET | |
A | = | 12" | clearances above grade, veran- |
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| (See Note 1) | da, porch, deck or balcony |
B | = | 12" | clearances to window or door |
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| that may be opened, or to per- |
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| manently closed window. |
D* | = | 18" | vertical clearance to ventilated |
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| soffit located above the terminal |
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| within a horizontal distance of 2 |
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| feet (60 cm) from the |
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| of the terminal |
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 within |
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| 3 feet (90cm) horizontally from the |
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I | = | 3 ft. (U.S.A.) |
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| 6 ft. (Canada) | clearance to service regulator |
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| vent outlet and electric service |
*30” minimum for vinyl clad soffits.
= AREA WHERE TERMINAL IS NOT PERMITTED
J | = | 9" (U.S.A.) |
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| 12" (Canada) | clearance to |
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| cal air supply inlet to build- |
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| ing or the combustion air in- |
K | = | 3 ft. (U.S.A.) | let to any other appliance |
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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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| (See Note 1) | sidewalk or a paved driveway |
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| located on public property |
M*** = | 18" | clearance under veranda, | |
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| porch, deck or balcony |
N | = | 6” | |
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| 12” | vinyl sidewalls |
O | = | 18” | |
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| 42” | vinyl soffit and overhang |
P | = | 8 ft. |
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| QMIN | RMAX |
1 cap | 3 feet | 2 x Q ACTUAL |
2 caps | 6 feet | 1 x Q ACTUAL |
3 caps | 9 feet | 2/3 x Q ACTUAL |
4 caps | 12 feet | 1/2 x Q ACTUAL |
QMIN = # termination caps x 3 RMAX = (2 / # termination caps) x QACTUAL
**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 1: On private property where termination is less than 7 feet above a sidewalk, driveway, deck, porch, veranda or balcony, use of a listed cap shield is suggested.
NOTE 2: Termination in an alcove space (spaces open only on one side and with an overhang) are permitted with the dimensions specified for vinyl or
Figure 32. Vent Termination Minimum Clearances
NOTE 3: Local codes or regulations may require different clearances.
NOTE 4: Termination caps may be hot. Consider their proximity to doors or other traffic areas.
WARNING: In the U.S: Vent system termination is NOT permitted in screened porches. You must follow side wall, overhang and ground clearances as stated in the instructions.
In Canada: Vent system termination is NOT permitted in screened porches. Vent system termination is permitted in porch areas with two or more sides open. You must follow all side walls, overhang and ground clearances as stated in the instructions.
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). IT IS STRONGLY RECOMMENDED WHENEVER POSSIBLE TO USE THE VINYL PROTECTOR KIT.
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