Brochure

How Modulation Works
The chart below demonstrates the eciency that a fully modulating tankless system can provide. The chart generally shows
the gas usage of a traditional boiler compared to that of a Rinnai Tankless Water Heater.* Peaks represent the tankless unit
meeting user demands, and valleys represent saved energy in between.
Rinnai
Energy savings
Boiler
*The comparison is not based on data from a specific installation.
0
2
2
6
10
14
18
4 10 12 14 16 18 20 22 24
HOURS
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How a Tankless Rack
System
TM
Works
Rinnai’s Tankless Rack System™ (TRS) is designed to supply
a packaged water heating solution as a fully assembled
system, providing an endless supply of hot water.
BENEFITS:
• Includes pre-assembled water and
gas manifolds and connections under
the tankless water heaters, sized to
maintain optimum performance
• Provides ability to link multiple units
together, allowing for redundancy
and dependability
• All of the Rinnai Tankless Water
Heaters in the TRS can electronically
connect up to 24 water heaters using
Cascade Cables
• Multi-system controls are designed
so that each water heater in the TRS
supplies an equal amount of hot water,
ensuring uniform usage throughout
the system
How Condensing
Technology Works
As illustrated in the diagram below, condensing
appliances use the latent heat of exhaust to
preheat incoming cold water. The colder the inlet
water, the higher the eciency and the more
condensate is generated.
Eect of Incoming Water Temperature on Condensing
Tankless Eciency
80
40 80 120 160
82
84
86
88
90
92
94
96
98
100
INLET WATER TEMPERATURE °F
EFFICIENCY %
condensing
mode
dew point
non-
condensing
mode
Learn more at rinnai.us
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WHY RINNAI?