Rinnai RH180 Specifications download pdf (Page 9)

RH180 Sizing

Water Heating

Options

Max input (Btuh

/ Kwh)

Tank Capacity

(gal.)

Time of available

hot water (min.)

Time of available

hot water (min.)

Recovery time

(min.)

Showers In use

at one time

70⁰ temp rise 70⁰ temp rise 70⁰ temp rise

Electric Tank 4.5 Kw 40 21 10 88

Gas Tank

34,000 Btu 40 18 8 36

40,000 Btu 50 26 11 40

75,000 Btu 75 50 19 32

Rinnai RH180

Hybrid

Tank -Tankless

91,300 Btu 40 Continuous 11 16

Rinnai Tankless

Up to 199,000

Btu

N/A Continuous Continuous N/A

• Data is based on a 50⁰F inlet water temperature and a 120⁰F hot water set point (70⁰F rise).

• Shower heads assumed to be 2.5 gpm mixed flow rate with 105⁰F at the fixture.

• Available hot water time and recovery time based on industry standard calculation methods

and Rinnai lab testing. Actual results may vary based on the application.

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Rinnai RH180 Specifications Page 9