Rinnai Advance Specifications download pdf (Page 23)

Rinnai Tankless Water Heaters were the ﬁrst 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 offers 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 VENTING OPTIONS

Venting available in vertical and

horizontal conﬁgurations. 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 efﬁciency using either a ¾” or ½” gas line, as long as sufﬁcient gas ﬂow

is available.

Because an undersized gas line can stress a tankless system and potentially reduce its life span,

Rinnai Tankless Water Heaters, unlike other tankless systems, are equipped with innovative

technology that safely ceases operation if it detects inadequate gas ﬂow in order to avoid

compromising performance and efﬁciency.

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

*For complete information on gas sizing for Rinnai Tankless

Water Heaters, consult the Operation and Installation Manual.

Source: NFPA 54/ANSI Z223.1 National Fuel Gas Code

RINNAI TANKLESS

WATER HEATER MODELS

NAME PLATE

RATINGS (BTU/H)

V53e

120,000 100’

450’

V65e

150,000

70’

300’

V65i

RUC80i / RU80e

152,000

166’

RL75i

180,000 50’

200’

RL75e

V75i

V75e

RLX94i

192,000

40’

175’

RUC98i

19 9,00 0

RU98e

RL94i

RL94e

INTENDED USE: Initial Supply Pressure of 8.0 in w.c. or greater; Inlet Pressure:

less than 2 psi; Pressure Drop: 3.0 in. w.c.; Speciﬁc Gravity: 0.60

SCH 40

METALLIC PIPE SIZE

MAXIMUM

EQUIVALENT LENGTH

1/2” 3/4”

Optimized Concentric Venting for Non-Condensing

Tankless Water Heaters

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Rinnai Advance Specifications Page 23

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