Discontinued Product, please contact 0800 RINNAI for more information

Discontinued Product, please contact 0800 RINNAI for more information

Infinity 20 External (REU-2408W)

Infinity 20 External (REU-2408W)


Spare parts and conversion are no longer available for this water heater.

Information such as the operating and installation instructions, specification information, and servicing information (in some cases) is still available to help support existing installed models.

Temperature controlled external continuous gas flow hot water system.

Hot water capacity
2.7 to 24 litres per minute.

Energy efficiency

Compatible controllers
• MC-33-3A (kitchen control)
• BC-45-3A (bathroom control)
• BSC-45-3A (ensuite or second bathroom control)

Suitable for
Suitable for use in average sized homes. External applications only.
Hard or acidic water will need to be treated to use this product.

Gas type
Available for Natural Gas or LPG.

Colour: White
Input: 21-188 MJ/h
Efficiency: 80%
REU Number: REU-2408W


Capacity Hot water capacity: 2.7-24 litres per minute
Nominal water capacity: 20 litres per minute at a 25 ° rise (1200 L/h)
Connections Hot water outlet: R¾ (20 mm)
Cold water inlet: R¾ (20 mm)
Gas supply: R¾ (20 mm)
Dip Switch Settings 40, 43, 40, 55, 60, 65, 75 °C
Exhaust System Forced flue
Ignition System Direct electronic ignition
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.

Noise Level 49 dB(A)
Power Consumption Normal: 55 W, Standby: 8 W, Automatic Frost Protection: 80 W
Pressure Relief Valve Opens at 2100 kPa and closes at 1500 kPa
Safety Devices Flame failure, boiling protection, remaining flame, thermal fuse, automatic frost protection, combustion fan rpm check, and overcurrent
Water Supply Minimum operating pressure - 200 kPa
Nominal operating pressure - 200-1200 kPa
Weight 18 kg
Market Release 1995
Discontinued 2002
Obsolete April 2013

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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