Brochure

Rinnai Tankless Water Heaters were the rst to use a unique Concentric Venting System, a single-vent
assembly option featuring an inner tube for exhaust and an outer tube for fresh air from outdoors.
The result is a direct-vent, sealed combustion system that oers optimum safety and performance.
Beyond performance, our concentric system option can make installation faster and easier with:
• Single penetration through the wall reducing install time and costs
• Simple positive-t components for secure connection
• Joint seals that expand and contract with weather to prevent damage
• Ease of assembly, adjustment and disassembly
FLEXIBLE TANKLESS
INSTALLATION OPTIONS
Venting available in vertical
and horizontal congurations.
Concentric structure allows hot
exhaust to exit through interior
tube, while fresh air enters
through the outer layer.
If your tankless water heater installation calls for the use of ½” gas line, Rinnai has two words for you…
no problem. Pick the gas line – and the Rinnai – that’s right for you.
‡
Rinnai Tankless Water Heaters are designed to always provide maximum performance and operating
eciency using either a ¾” or ½” gas line, as long as sucient gas ow is available.
Rinnai Makes Your 1/2” Gas Line an Option, Not an Obstacle.
The table to the left lists the maximum length for both
½” and ¾” gas lines when paired with each of Rinnai’s
Tankless Water Heaters.
How To Properly Size Your Gas Line:
• Determine what type of gas is being utilized
• Determine the inlet pressure
• Determine the allowed pressure drop
• Determine what other types of gas appliances
are sharing the gas line
• Determine the maximum loads expected on
the whole system as stated in the National Fuel
Gas Code
Source: NFPA 54/ANSI Z223.1 National Fuel Gas Code.
‡
For complete information on gas sizing for Rinnai Tankless Water Heaters,
consult the Operation and Installation Manual.
RINNAI TANKLESS
WATER HEATER MODELS
BTU
V53e
120,000
100'
(30.4 m)
450’
(137.2 m)
RUCS65i
130,000
350’
(106.7m)
RUS65e
V65e
150,000
70’
(21.34 m)
300’
(91.44 m)
V65i
RUC80i
152,000
250’
(76.2 m)
RU80e
RUCS75i
160,000
60’
(18.29 m)
RUS75e
RL75i
180,000
50’
(15.24 m)
200’
(60.96 m)
RL75e
V75i
V75e
RUC90i
RU90e
RLX94i
192,000
40’
(12.19 m)
175’
(53.34 m)
RUC98i
199,000
RU98e
RL94i
RL94e
RUR98i
RUR98e
GAS LINE
MAXIMUM
EQUIVALENT LENGTH
1/2” 3/4”
Optimized Concentric Venting for Non-Condensing
Tankless Water Heaters
Because an undersized gas
line can stress a tankless
system and potentially
reduce its life span, Rinnai
Tankless Water Heaters,
unlike other tankless water
heaters, are equipped with
innovative technology that
safely ceases operation if it
detects inadequate gas ow in
order to avoid compromising
performance and eciency.
Other Recirculation
SOLUTIONS
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