Raypak AVIA 264A Installation And Operation Manual page 8

F10692
Figure 3. 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 above the
D terminal within a horizontal distance of 2' (61 cm) 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 above
H
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
Do not terminate above paved sidewalk or paved
L
driveway
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/CSA-B149 Installation Codes.
t 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' (30 cm).
* Clearances in accordance with local installation codes and the requirements of the gas supplier.
8
Table C. Vent/Air Inlet Termination Clearances
1
U.S. Installations
1' (30 cm)
4' (1.2 m) below or to side of
opening
*
5' (1.5 m)
*
*
6' (1.83 m)
*
*
4' (1.2 m) below or to side of
opening; 1' (30 cm) above
opening
3' (91 cm) above if within
10' (3 m) horizontally
Slip hazard due to frozen
condensate
*
V = VENT
X = AIR INLET
2
Canadian Installations
1' (30 cm)
3' (91 cm)
*
*
*
*
*
3' (91 cm) within a height
15' (4.5 m) above the meter/
regulator assembly
6' (1.83 m)
3' (91 cm)
6' (1.83 m)
Slip hazard due to frozen
condensate
t
1' (30 cm)