Raypak 503-2003 Installation And Operating Instructions Manual page 10

SECTION C: Installation
Fig. 5: Minimum Clearances from Vent/Air Inlet Terminations – Indoor and Outdoor Installations
Clearance above grade, veranda, porch, deck, or
A
balcony
B Clearance to window or door that may be opened
C Clearance to permanently closed window
Vertical clearance to ventilated soffit located
D above the terminal within a horizontal distance 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 extended
H
above meter/regulator assembly
I Clearance to service regulator vent outlet
Clearance to non-mechanical air supply inlet to
J 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
M Clearance under veranda, porch, deck or balcony
1
In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Code
2
In accordance with the current CAN/CGA-B149 Installation Codes
Vent terminal shall not terminate directly above sidewalk or paved driveway located between 2 single family dwellings that serves both dwellings
t
TT Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor and top of terminal 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
Table D: Vent/Air Inlet Termination Clearances
8
1
U.S. Installations
1 ft (30 cm)
4 ft (1.2m) below or to side
of opening; 1 foot (30 cm)
above opening
*
5 ft (1.5m)
*
*
6 ft (1.83m)
*
*
4 ft (1.2m) below or to side
of opening; 1 ft (30 cm)
above opening
3 ft (91 cm) above if within
10 ft (3m) horizontally
7 ft (2.13m)
*
2
Canadian Installations
1 ft (30 cm)
3 ft (91 cm)
*
*
*
*
*
3 ft (91 cm) within a height
15 ft above the me-
ter/regulator assembly
6 ft (1.83m)
3 ft (91 cm)
6 ft (1.83m)
7 ft (2.13m) t
12 in. (30 cm) TT