4
OPERABLE
OPERABLE
FIXED
CLOSED
FIXED
CLOSED
DETAIL
INSIDE CORNER
V
V
V
V
V
V
V
V
X
X
V
VENT TERMINAL PERMITTED
V
AREA WHERE TERNIMAL IS NOT PERMITTED
AIR SUPPLY INLET
B
B
B
A
J
B
I
M
C
F
B
B
E
D
L
G
A
H
K
* For clearances not specified in ANSI Z223.1 / NFPA 54 or CGA-B149, please use clearances in accordance with
local installation codes and the requirements of the gas supplier.
CAUTION
Maintain 12” of clearance above the highest anticipated snow level or grade or whichever is greater.
Please refer to your local codes for the snow level in your area.
REF
A
B
C
D
E
F
G
H
I
J
K
L
M
DESCRIPTION
Clearance above grade, veranda, porch, deck, or balcony
Clearance to window or door that may be opened
Clearance to permanently closed window
Vertical clearance to ventilated soffit, eaves or overhang
Clearance to unventilated soffit, eaves, or overhang
Clearance to outside corner
Clearance to inside corner
Clearance to each side of center line extended above
meter/regulator assembly
Clearance to service regulator vent outlet
Clearance to nonmechanical air supply inlet to building
or the combustion air inlet to any other appliance
Clearance to a forced air inlet into a building
Clearance above paved sidewalk or paved driveway
located onpublic property
Clearance under deck, veranda, porch, or balcony
(open on 3 sides)
U.S.
INSTALLATIONS
1 foot
1 foot
*
*
*
*
*
*
*
1 foot
3 feet above if
within 10 feet
horizontally
*
*
CANADIAN
INSTALLATIONS
1 foot (0,30 m)
3 feet (0,91 m)
*
*
*
*
*
3 feet (0,91 m) within a height 15 feet
(4,57 m) above the meter/regulator
assembly
3 feet (0,91 m)
3 feet (0,91 m)
6 feet (1,83 m)
7 feet (2,13 m)
1 foot (0,30 m)
Recommended vent/air intake
terminal position
Terminals should be so positioned as to avoid products of combustion entering openings
into buildings or other flues or vents. The Ubbink Rolux White Vent extension material is
primarily designed for indoor use. If used outdoors the material should be protected for
UV-radiation (direct sunlight).
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