Rinnai RH180 Installation Fundamentals page 65

Before / After Installations
Before
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Three, 40 gallon tank
water heaters (2-gas,
1-electric) servicing a
5,000 sq. ft. home
The gas units were
common vented with
a furnace.
No change to the
existing vent was
required to install the
RH180.
The RH180
sufficiently replaced
all three tanks.
After