State 520 - Manual (Page 15)

Installation
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Page
‐Vent clearances‐
Canada U.S.A
Direct vent and
other than Direct
Vent
Direct vent Other than Direct Vent
A
Clearance above grade, veranda, porch, deck,
or balcony.
1 foot 1 foot 1 foot
B
Clearance to window or door that may be
opened.
3 feet 1 foot
4 feet from below or side
opening. 1 foot from
above opening.
C Clearance to permanently closed window * * *
D
Vertical clearance to ventilated soffit located
above the vent terminator within a horizontal
distance of 2 feet (61cm) from the center line
of the terminator.
* * *
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
3 feet * *
I Clearance to service regulator vent outlet. 3 feet * *
J
Clearance to non‐mechanical air supply inlet
to building or the combustion air inlet to any
other application.
3 feet 1 foot
4 feet from below or side
opening. 1 foot from
above opening.
K Clearance to mechanical air supply inlet. 6 feet 3 feet 3 feet
L
Clearance above paved sidewalk or paved
driveway located on public property.
7 feet * 7 feet
M
Clearance under veranda, porch deck, or
balcony.
1 foot * *
*For clearances not specified in ANSI Z223.1 / NFPA 54 or CAN/CSA‐B149.1, please use clearances in accordance with
local installation codes and the requirement of the gas supplier.