Rheem 96MDV Series, Installation Instructions Manual

Page: 65 / 128

65
DIRECT VENT TERMINATION CLEARANCES
GENERAL VENTING REQUIREMENTS AND
GUIDELINES
Figure 32
shows minimum clearances that must be used for direct venting terminations.
FIGURE 32
DIRECT VENT TERMINAL CLEARANCES
VENT TERMINATION CLEARANCES
FOR DIRECT VENT INSTALLATIONS IN THE USA AND CANADA
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.
6 inches (15cm) for appliances<10,000 Btuh (3kw),
12 inches (305mm) 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 ft. (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)*
† 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.
ST-A1194-18
FIG. A
* 2 ft. (0.6m)
* 3 ft. (.9m), 10 ft. (3.05m) preferred
6 inches (152mm) for appliances<10,000 Btuh (3kw),
12 inches (305mm) for appliances >10,000 Btuh (3kw),
and<100,000 Btuh (30kw),
36 inches (.9m) for appliances > 100,000 Btuh (30kw)
6 inches (152mm) for appliances <10,000Btuh (3kw),
12 inches (305mm) for appliances > 10,000 Btuh (3kw)
and<100,000 Btuh (30kw),
36 inches (.9m)for appliances > 100,000 Btuh (30kw)
Must conform to
CSA B149.1-10, Sect. 8.14.
(30cm)
ST-A1194-18
FIGURE A
Ve
ntin
g