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EXTERIOR FLUE TERMINATION LOCATIONS
A= Clearance above grade, veranda, porch, deck, or balcony *(min. 12"/30cm)
B= Clearance to window or door that may be opened *(12"/30cm)
C= Clearance to permanently closed window *(min. 12"/30cm) recommended to prevent
condensation on window
D= Vertical clearance to ventilated soffit located above the terminal within a horizontal
distance of (24"/60cm) from the centerline of the terminal (min. 18"/46cm) check with
local code.
E= Clearance to unventilated soffit (min. 15"/38cm)
F= Clearance to outside corner: with AstroCap Termination Cap (min 6"/15cm), with Dura-
Vent Termination Cap (14"/36cm)
G= Clearance to inside corner: with AstroCap Termination Cap (min 6"/15cm), with Dura-
Vent Termination Cap (12"/30cm)
H= Not to be installed above a meter/regulator assembly within (3'/90cm) horizontally from
the centerline of the regulator.
J= Clearance to service regulator vent outlet *(min 36"/90cm)
K= Clearance to non-mechanical air supply inlet to building or the combustion air inlet to
any other appliance *(12"/30cm)
L= Clearance to a mechanical air supply inlet *(min. 72"/1.8m)
M= Clearance above paved sidewalk or a paved driveway located on public property
*(min. 84"/2.1m)
N= Clearance under veranda, porch, deck, or balcony *(min. 12"/30cm)
Note:
- 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.
- If the vent termination is accessible, a certified guard shall be installed.
* As specified in CGA B149 Installation Code. Note: Local codes or regulations may require
different clearances.
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