| V | = VENT TERMINAL | X = AIR SUPPLY INLET |
A | = 12 inches ............. clearances above grade, veran- | ||
|
| (See Note 1) | da, porch, deck or balcony |
B= 12 inches ............ clearances to window or door that may be opened, or to per- manently closed window. (Glass)
D* | = 18 inches | vertical clearance to unventilat- |
|
| ed soffit or to ventilated soffit lo- |
|
| cated above the terminal |
| *30 inches | for vinyl clad soffits and below |
|
| electrical service |
F= 9 inches .............. clearance to outside corner
G= 6 inches ............... clearance to inside corner
H= 3 ft. (Canada) ...... not to be installed above a gas meter/regulatorassembly within 3 feet (90cm) horizontally from the
I= 3 ft. ....................... clearance to gas service regula- tor vent outlet
J= 9 inches (U.S.A.)
12 inches (Canada)clearance to
**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, or meets Note 2.
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 is suggested. (See vents components pages.)
NOTE 2: Termination in an alcove space (spaces only open on one side and without an overhang) are permitted with the dimensions specified for vinyl or
NOTE 3: Location of the vent termination must not interfere with access to the electrical service.
Figure 4.4
(S(SeeNoteNote2)2)
v
v 
v
v
= AREA WHERE TERMINAL IS NOT PERMITTED
K | = | 3 ft. (U.S.A.) |
|
|
| 6 ft. (Canada) | clearance to a mechanical |
|
|
| (powered) air supply inlet |
L** | = | 7 ft | clearance above paved |
|
| (See Note 1) | sidewalkor a paved driveway |
|
|
| located on public property |
M*** = | 18 inches | clearance under veranda , | |
|
|
| porch, deck, balcony or over- |
|
|
| hang |
|
| 42 inches | vinyl |
S | = | 6 inches | clearance from sides of |
|
| (See Note 3) | electrical service |
T | = | 12 inches | clearance above electrical |
|
| (See Note 3) | service |
Alcove Applications
N= 6 inches .................
P = 8 ft.
| QMIN | RMAX |
1 cap | 3 feet | 2 x Q ACTUA L |
2 caps | 6 feet | 1 x Q ACTUA L |
3 caps | 9 feet | 2/3 x Q ACTUA L _ |
4 caps | 12 feet | 1/2 x Q ACTUA L |
QMIN = # termination caps x 3 RMAX = (2 / # termination caps) x QACTUAL
NOTE: Local codes or regulations may require different clearances.
NOTE: 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 slated 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 side wall, overhang and ground clearances as stated in the instructions.
CAUTION: IF EXTERIOR WALLS ARE FINISHED WITH VINYL SIDING, IT IS SUGGESTED THAT A VINYL PROTECTOR KIT BE INSTALLED (part #VPK- DV).
January 28, 2008 | Page 9 |