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4.3.6 Clearances
Indoor (internal) units
Figure 9: Clearances
Table 7: Clearances
Indoor units
Location
Top
2 in. (51 mm)
0 in. from vent components
Bottom/Ground
12 in. (305 mm)
Front (Panel)
0 in.
The clearance for servicing is 24
inches (610 mm) in front of the
water heater.
For closet installation, clearance is
6 inches (152 mm) from the front
of the water heater.
Back
0 in.
Sides
2 in. (51 mm)
(Left and Right)
Vent
0 in.
CAUTION
20
Top
Front
Side
Bottom
Clearances To Combustibles
and Non-Combustibles
If clearances are not met, damage to the property and water heater may occur.
Rinnai Tankless Water Heater Installation and Operation Manual
Outdoor (external) units
Outdoor units
Clearances To Combustibles
Location
Top
2 in. (51 mm)
Bottom/Ground
12 in. (305 mm)
Front (Panel)
0 in.
The clearance for servicing is
24 inches in front of the water
heater.
Do not block the combustion air
openings.
Back
0 in.
Sides
2 in. (51 mm)
(Left and Right)
0.125 in. (3.18 mm) for recess
box.
Front (Exhaust)
24 in. (610 mm)
Do not install this water heater under an overhang less
than 3 ft. (91.4 cm) from its top. The area under the
overhang must be open on three sides.
Top
Front
Side
Bottom
and Non-Combustibles
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