Installers Information
Power Venting
Clearances
Surface mount power venting
outlet must have a minimum of
36 inches clearance below and in
front of any material.
Flush mount power venting
must have a minimum of 18
inches clear below the bottom
of the power vent, and 36 inches
clearance in front of power vent.
0 in.
0 in.
0 in.
36”
Min.
Clearance
POWER
VENT
OUTLET
Surface mount power vent
Flush mount power vent
0 in.
0 in.
0 in.
36 in.
18”
Min.
Clearance
18”
Min.
Clearance
0 in.
M
K
I
A
V
G
G
H
A
J
V
G
A
B
C
A
V
V
A
V
B
F
B
L
V
E
V
V
V
D
FIXED
CLOSED
FIXED
CLOSED
OPEN-
ABLE
OPEN-
ABLE
AIR SUPPLY INLET
VENT TERMINAL
GAS METER
AREA WHERE TERMINAL
IS NOT PERMITTED
B
B
Figure 49: Vent terminal minimum clearances.
Figure 50: Power vent clearances.
26
TCHF.22BODYA_ 211215-32
TCHF.22STBODYA
5055.64-A
A= See bottom of page
Clearances above grade, veranda, porch, deck, or balcony. (See “Power Venting Clearances” for flush mount rule.
B= *12 inches (30 cm) min.
Clearance to window or door that may be opened
C= 12 inches (30 cm) min.
Clearance to permanently closed window recommended to preventing condensation on window
D= 0 inches (0 cm) min.
Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (60 cm) from the
edge of the terminal
E= 0 inches (0 cm) min.
Clearance to unventilated soffit
F= 6 inches (15 cm) min.
Clearance to outside corner
G= 6 inches (15 cm) min.
Clearance to inside corner
H= 3 feet (90 cm) min.
*Not to be installed above a meter/regulator assembly within 3 feet (90 cm) horizontally from the center-line of the
regulator
I= *6 feet (1.8 m) min.
Clearance to service regulator venting outlet
J= *12 inches (30 cm) min.
Clearance to non mechanical air supply inlet to building or the combustion air inlet to any other appliance
K= *6 feet (1.8 m) min.
Clearance to a mechanical air supply inlet
L= *7 feet (2.1 m) min.
^ Clearance above paved side-walk or a paved driveway located on public property
M= **0 inches (0 cm) min
Clearance under veranda, porch, deck, or balcony
^ a venting shall not terminate directly above a side-walk 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*
* as specified in CAN/CSA B149.1 Installation Codes, Note: local Codes or Regulation may require different clearances
* for U.S.A. Installations follow the current National Fuel Gas Code, NFPA54/ANSI Z223.1
Vent Terminal Minimum Clearances
