Whirlpool WFCT, Installation Instructions Manual, Page: 10 / 32

10
Sidewall Vent Terminal Clearances—Direct Vented Furnaces (Horizontal Venting)
Vent Terminal
Air Supply Intake
Area Where Terminal Is
Not Permitted
X
Inside
Corner Detail
A
V
G
V
H
K
V
X
M
I
A
J
X
V
B
B
B
B
V
V
Fixed
Closed
B
V
V
C
V
B
V
E
D
L
F
Fixed
Closed
Operable
Operable
U.S. Installations 1
A Clearance above grade, veranda, porch, deck, or balcony 12" (30.5 cm)
B Clearance to window or door that may be opened 6" (15.2 cm) for appliances less than 10,000 Btu/h, 9" (22.9 cm) for
appliances greater than 10,000 Btu/h, and less than or equal to
50,000 Btu/h, 12" (30.5 cm) for appliances greater than
50,000 Btu/h
C Clearance to permanently closed window *
D Vertical clearance to ventilated soffit located above the
terminal within a horizontal distance of 24" (61 cm) from the
center line of the terminal
*
E Clearance to unventilated soffit *
F Clearance to outside corner *
G Clearance to inside corner *
H Clearance to each side of center line extended above meter/
regulator assembly
*
I Clearance to service regulator vent outlet *
J Clearance to nonmechanical air supply inlet to building or
the combustion air inlet to any other appliance 6" (15.2 cm) for appliances less than or equal to 10,000 Btu/h, 9"
(22.9 cm) for appliances greater than 10,000 Btu/h, and less than
or equal to 50,000 Btu/h, 12" (30.5 cm) for appliances greater than
50,000 Btu/h
K Clearance to a mechanical air supply inlet 36" (91.4 cm) above if within 10 ft (3 m) horizontally
L Clearance above paved sidewalk or paved driveway located
on public property *
M Clearance under veranda, porch, deck, or balcony *
1 In accordance with the current ANSI Z2223.1/NFPA 54, National Fuel Gas Code.
*Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer’s installation
instructions.