Raypak 259 Installation & Operating Instructions Manual page 15

Minimum Clearances from Vent/Air Inlet Terminations – Indoor and Outdoor Installations
Clearance above grade, veranda, porch,
A
deck, or balcony
Clearance to window or door that may be
B
opened
C Clearance to permanently closed window
Vertical clearance to ventilated soffit located
above the terminal within a horizontal dis-
D
tance of 2 ft (61cm) from the centerline of the
terminal
E Clearance to unventilated soffit
F Clearance to outside corner
G Clearance to inside corner
Clearance to each side of center line ex-
H
tended above meter/regulator assembly
I Clearance to service regulator vent outlet
Clearance to non-mechanical air supply inlet
J to building or the combustion air inlet to any
other appliance
K Clearance to mechanical air supply inlet
Clearance above paved sidewalk or paved
L
driveway located on public property
Clearance under veranda, porch, deck or
M
balcony
1
In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Code
2
In accordance with the current CAN/CSA-B149 Installation Codes
t Vent terminal shall not terminate directly above sidewalk or paved driveway located between 2 single family dwellings that se rves
both dwellings
TT Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor and top of term inal and
underside of veranda, porch, deck or balcony is greater than 1 ft (30cm)
* Clearances in accordance with local installation codes and the requirements of the gas supplier
U.S. Installations
4 ft (1.2m) below or to side
of opening; 1 foot (30 cm)
4 ft (1.2m) below or to side
of opening; 1 ft (30 cm)
3 ft (91 cm) above if within
10 ft (3m) horizontally
Vent/Air Inlet Termination Clearances
15
1
Canadian Installations
1 ft (30 cm)
above opening
*
5 ft (1.5m)
*
*
6 ft (1.83m)
3 ft (91 cm) within a
height 15 ft above the
*
meter/regulator assembly
*
above opening
7 ft (2.13m)
*
2
1 ft (30 cm)
3 ft (91 cm)
*
*
*
*
*
3 ft (91cm)
3 ft (91 cm)
6 ft (1.83m)
7 ft (2.13m) t
12 in. (30 cm) TT