Rheem 96MDV Series, Installation Instructions Manual

Page: 57 / 128

57
Figure 21
shows minimum clearances that must be used for non-direct venting terminations.
NON-DIRECT VENT TERMINATION CLEARANCES
GENERAL VENTING REQUIREMENTS AND
GUIDELINES
FIGURE 21
VENT TERMINATION CLEARANCES FOR NON-DIRECT VENT INSTALLATIONS
K
D
E
L
B
C
F
G
A
B
J
A
M
I
H
INSIDE CORNER
DETAIL
VENT TERMINAL
AIR SUPPLY INLET
AREA WHERE TERMINAL
IS NOT PERMITTED
Fixed
Closed
Operable
B
Fixed
Closed
Operable
B
B
A = Clearance above grade, veranda, porch, deck
or balcony
B = Clearance to window or door that may be opened
C = Clearance to permanently closed window
D = Vertical clearance to ventilated soffit located above the
terminal within a horizontal distance of 2 feet (0.6m)
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 = &OHDUDQFHWRQRQíPHFKDQLFDODL r supply inlet to building
or the combustion air inlet to any other appliance
K = Clearance to mechanical air supply inlet
L = Clearance above paved sidewalk or paved driveway
located on public property
M = Clearance under veranda, porch, deck or balcony
US Installations
1 Canadian Installations
2
12 inches (305mm) or 12 in. 305mm)
above average snow accumulation.
4 feet (1.2m) below or to side of
opening; 1 foot (30cm) above
opening
6 inches (15cm) for appliances<10,000 Btuh (3kw),
12 inches (30cm) for appliances >10,000 Btuh (3kw),
and<100,000 Btuh (30kw),
36 inches (.9m) for appliances > 100,000 Btuh (30kw)
* 12" (30cm)
* 3 ft. (.9m), 10 ft. (3.05 m) preferred
* 7 feet (2.1m)
3 feet (.9m) within a height 15 feet (4.5m) above the
meter / regulator assembly
*3 feet (.9m)
6 inches (15cm) for appliances <10,000Btuh (3kw),
12 inches (30cm) for appliances > 10,000 Btuh (3kw)
and<100,000 Btuh (30kw),
36 inches (.9m)for appliances > 100,000 Btuh (30kw)
3 feet (.9m) above if within 10 feet (3m)
horizontally 6 feet (1.8m)
1
In accordance with the current ANSI Z223.1/NFPA 54 Natural Fuel Gas Code
2
In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code
*For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, clearance
will be in accordance with local installation codes and the requirements of the gas
supplier and these installation instructions."
* 12" (30cm)
* Equal to or greater than soffit depth * 3" (0.9m)
* Equal to or greater than soffit depth
* No minimum to outside corner * No minimum to outside corner
3 feet (.9m) within a height 15 feet (4.5m)
above the meter / regulator assembly
3 feet (.9m)*
* 2" (0.6m)
* 3 ft. (.9m), 10 ft. (3.05 m) preferred
4 feet (1.2m) below or to side of
opening; 1 foot (30cm) above
opening
must conform to
CSA B149.1-10, Sect. 8.14.
(30cm)
† A vent shall not terminate less than 7 ft. (2.1m) above a paved sidewalk or paved driveway
that is located on public property.
‡ Permitted only if veranda, porch, deck or balcony is full open on a minimum of two sides
beneath the floor. We reccommend avoiding this location if possible.
Ve
ntin
g
ST-A1194-19 FIG A