Discontinued Product, please contact 0800 RINNAI for more information

Discontinued Product, please contact 0800 RINNAI for more information

Infinity 22 External (REU-2422W)

Infinity 22 External (REU-2422W)

Obsolete April 2019

Spares and conversion are no longer available for this water heater. Other information is still available online to support existing installed product.

Temperature controlled continuous gas flow hot water system, with status monitor, for external domestic and commercial applications.

Hot water capacity
2.7 to 24 litres per minute.

Energy efficiency

Compatible controllers
• MC-33-2A (standard kitchen controller)
• BC-45-2A (standard bathroom controller)
• BSC-45-2A
• MC70-1A (deluxe kitchen controller)
• BC70-1A (deluxe bathfill controller)

Suitable for
• External domestic and commercial installations
• For homes with up to two bathrooms
• Mains and low pressure systems
Hard or acidic water will need to be treated to use this product.

Gas type
Available for Natural Gas or LPG. Specify gas type at time of purchase.

Colour: White
Input: 21 MJ/h to 188 MJ/h
Efficiency: 80%
REU Number: REU-2422W


Capacity Hot water capacity: 2.7 to 24 litres per minute
Nominal water capacity: 22 litres per min. at 25 °C rise (1320 L/h)
Connections Hot water outlet: R¾ (20 mm)
Cold water inlet: R¾ (20 mm)
Gas supply: R¾ (20 mm)
Dip Switch Settings Available 40, 43, 50, 55, 60, 65, 75 °C
Exhaust System Forced flue
Ignition System Direct electronic ignition
Injector Size (mm) NG: 1.70
LPG: 1.0
Line Pressure (min.) NG: 1.13 kPa, LPG: 2.75 kPa
Line Pressure (max.) 3.5 kPa (maximum standing pressure under abnormal intermittent conditions is 5.0 kPa).

In the case of commercial metering (i.e. 35-37 kPa coming in), there may be a requirement to regulate the incoming line pressure down.
Power Consumption Normal: 55 W, Standby: 8W, Automatic Frost Protection: 80 W
Noise Level 49 dB(A)
Pressure Relief Valve opens 2100 kPa, closes at 1500 kPa
Safety Devices Flame failure, boiling protection, OHS, thermal fuse, automatic frost protection, combustion fan rpm check, and over current.
Water Supply Minimum operating pressure - 220 kPa
Nominal operating pressure - 220-1200 kPa
Minimum water flow - 2.7 litres/minute for burner activation
Weight 18 kg
Market Release 2002
Discontinued 2004
Obsolete April 2019

Ducted Gas Heating Service Centre

Ducted Gas Heating Service Centre
Operating 5 days a week, 8am to 5pm, Monday to Friday our New Zealand based customer service centre provides nothing but top quality. If you need to book in a Ducted Gas Heating service, we have a team of providers fully trained and equipped with diagnostic tools to service your appliance when you need them. 

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