Rheem RTG-3 Series Use And Care Manual page 27

Venting for Direct-Vent Water Heater
Horizontal Vent Terminal Location for Other than Direct Vent/Outdoor Heater
V VENT TERMINAL
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 (61 cm) 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 meter/regulator assembly. above
I = Clearance to service regulator vent outlet.
J = Clearance to nonmechanical air supply inlet
to building or the combustion air inlet to any
other appliance..
K = Clearance to mechanical air supply inlet.
L = Clearance above paved side walk or paved
driveway located on public property.
M = Clearance under veranda, porch, deck or
balcony.
In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code
1
In accordance with the current ANSI Z223.1/ NFPA 54 National Fuel Gas Code
2
‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
INSTALLATION INSTRUCTIONS
Inside
corner detail
Operable
Fixed
closed
Operable
X AIR SUPPLY INLET
Canadian Installations
12 inches (30 cm)
• 6 in (15 cm) for appliances ≤ 10,000 Btuh
(3 kW),
• 12 in (30 cm) for appliances > 10,000 Btuh
(3 kW) and ≤ 100,000 Btuh (30 kW),
• 36 in (91 cm) for appliances > 100,000 Btuh
(30 kW)
0 in (0 cm)
12 in (30 cm)
12 in (30 cm)
24 in (61 cm)
18 in (46 cm)
3 feet (91 cm) within a height 15 feet (4.6 m)
3 feet (91 cm)
• 6 in (15 cm) for appliances ≤ 10,000 Btuh
(3 kW),
• 12 in (30 cm) for appliances > 10,000 Btuh
(3 kW) and ≤ 100,000 Btuh (30 kW),
• 36 in (91 cm) for appliances > 100,000 Btuh
(30 kW)
6 feet (1.83 m)
7 feet (2.13 m)
12 in (30 cm)
15 ft
Fixed
closed
Regulator vent outlet in the event no
regulator is present, H and I can be
disregarded.
AREA WHERE TERMINAL IS NOT PERMITTED
US Installations
1
12 inches (30 cm)
4 ft (1.2) below or to side of opening; 1 ft
(300 mm) above opening.
12 in (30 cm)
12 in (30 cm)
24 in (61 cm)
18 in (46 cm)
3 ft (91 cm) within a height of 15 ft (4.6 m)
3 feet (91 cm)
4 ft (1.2) below or to side of opening; 1 ft
(300 mm) above opening.
3 feet (91 cm) above if within 10 feet (3 m)
horizontally.
7 feet (2.13 m) for mechanical draft systems
(Category I appliances); vents for Category II
and IV appliances cannot be located above public
walkways or other areas where condensate or
vapor can cause a nuisance or hazard.
‡
12 in (30 cm)
2
0 in (0 cm)
‡
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