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Rinnai Tankless Water Heater Installation and Operation Manual 22
4.3.6 Clearances
Location
Clearances to Combustibles
and Non-Combustibles
Top 2 in. (51 mm)
0 in. from vent components
Bottom/Ground 12 in. (305 mm)
Front 0 in.
Clearance for servicing is 24 in. (610 mm)
in front of water heater
Back 0 in.
Sides (Left and Right) 2 in. (51 mm)
Add 0.25 in. (6.35 mm) for recess box
Vent
(Internal/Indoor Models)
0 in.
Front Exhaust
(External/Outdoor Models)
24 in. (610 mm)
Side
Top Top
Side
BottomBottom
FrontFront
Figure 8: Clearances
Table 6: Clearances
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