Rinnai RL75i Installation And Operation Manual page 7

Terminal Clearances
For indoor models, you must install a vent termination to bring in combustion air and expel exhaust.
TERMINATION
Clearance in
Ref. A also
applies to
anticipated
snow line
SNOW
D
E
B
L
Ref
Description
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 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
Clearance to each side of center line extended
H
above meter/regulator assembly
I Clearance to service regulator vent outlet
Clearance to nonmechanical air supply inlet to
J building or the combustion air inlet to any other
appliance
K Clearance to a 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] A vent shall not terminate directly above a sidewalk or paved driveway
that is located between two single family dwellings and serves both
dwellings.
[2] Permitted only if veranda, porch, deck, or balcony is fully open on a
minimum of two sides beneath the floor.
INSIDE
CORNER DETAIL
G
A
B
OPERABLE
B
C
FIXED
B
CLOSED
A
OPERABLE
F
B
Direct Vent (Indoor Unit)
Canadian Installations
(CSA B149.1)
12 inches (30 cm)
36 inches (91 cm)
*
*
*
*
*
3 feet (91 cm) within a
height 15 feet (4.5 m)
above the meter/
regulator assembly
36 inches (91 cm)
36 inches (91 cm)
6 feet (1.83 m)
7 feet (2.13 m) 
12 inches (30 cm) 
VC Series Manual
H
I
M
B
FIXED
K
CLOSED
J
US 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
12 inches (30 cm)
(3 kW) and ≤ 100,000 Btuh (30
kW), 36 in (91 cm) for appliances
*
*
*
*
*
3 feet (91 cm) within a height 15
feet (4.5 m) above the meter/
*
*
6 in (15 cm) for appliances ≤
10,000 Btuh (3 kW), 12 in (30
cm) for appliances > 10,000 Btuh
12 inches (30 cm)
(3 kW) and ≤ 100,000 Btuh (30
kW), 36 in (91 cm) for appliances
3 feet (91 cm) above if
within 10 feet (3 m)
horizontally
*
*

For clearances not specified in ANSI Z223.1/NFPA 54, clearances are in
accordance with local installation codes and the requirements of the gas
supplier.
Clearance to opposite wall is 24 inches (60 cm).
X
AIR SUPPLY INLET
V
VENT TERMINAL
AREA WHERE TERMINAL IS
NOT PERMITTTED
Other than direct vent (Outdoor unit)
Canadian Installations
(CSA B149.1) (ANSI Z223.1 / NFPA 54)
12 inches (30 cm) 12 inches (30 cm)
4 ft (1.2 m) below or to side
of opening; 1 ft (300 mm)
>100,000 Btuh (30 kW)
*
*
*
*
*
regulator assembly
36 inches (91 cm)
4 ft (1.2 m) below or to side
of opening; 1 ft (300 mm)
>100,000 Btuh (30 kW)
3 feet (91 cm) above if
within 10 feet (3 m)
6 feet (1.83 m)
7 feet (2.13 m) 
12 inches (30 cm) 
US Installations
above opening
*
*
*
*
*
*
*
above opening
horizontally
*
*
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