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A= Clearance above grade, veranda, porch, deck, or balcony *(min. 12"/30cm) | H= Not to be installed above a meter/regulator assembly within | |
B= Clearance to window or door that may be opened *(12"/30cm) #(9"/23cm) |
| (3'/90cm) horizontally from the centerline of the regulator. |
C= Clearance to permanently closed window *(min. 12"/30cm) | J= | Clearance to service regulator vent outlet *(min. 36"/90cm) |
D= Vertical clearance to ventilated soffit located above the terminal within a horizontal | K= Clearance to | |
distance of (24"/60cm) from the centerline of the terminal (min. 22"/55cm) check with |
| or the combustion air inlet to any other appliance *(12"/30cm) #(9"/23cm) |
local code. | L= | Clearance to a mechanical air supply inlet *(min. 72"/1.8m) |
E= Clearance to unventilated soffit (min. 12"/30cm) |
| #3' (91cm) above if within 10' (3m) horizontally. |
F= Clearance to outside corner (12"/30cm) | M= **Clearance above paved sidewalk or a paved driveway located | |
G= Clearance to inside corner (12"/30cm) |
| on public property *(min. 84"/2.1m) |
| N= Clearance under veranda, porch, deck, or balcony *(min. | |
|
| 12"/30cm)*** |
Note: * As specified in CGA B149 Installation Code. Note: Local codes or | regulations may require different clearances. | |
**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 two sides beneath the floor.
# In accordance with the current ANSI Z223.1/NFPA 54, National Gas Code
EXTERIOR VENT TERMINAL LOCATIONS
INSTALLATION
