Discontinued Product, please contact 0800 RINNAI for more information

Discontinued Product, please contact 0800 RINNAI for more information

Infinity 24 External (REU-24WA)

Infinity 24 External (REU-24WA)


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.
The Infinity 24 is an externally mounted temperature controlled continuous gas hot water system. The Infinity 24 also has the added feature of  'Q' functionality which allows for more accurate temperature control.

Compatible controllers
• MC-33-3 kitchen controller
• BC-45-3 bathroom controller
• BSC-45-3 second bathroom controller

Suitable for
• external domestic installations
• for homes with up to two bathrooms
Hard or acidic water will need to be treated to use this product.

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

Colour: White
Input: 20-188 MJ/h (low to high)
Efficiency: 5 star AGA rating
REU Number: REU-24WA


Capacity Hot water capacity: 2.7 to 24 litres per minute
Nominal water capacity: 24 litres per min. at 25 °C rise (1440 L/h)
Connections Hot water outlet: R¾ (20 mm)
Cold water inlet: R¾ (20 mm)
Gas supply: R¾ (20 mm)
Exhaust System Forced flue
Ignition System Direct electonic ignition
Injector Size (mm.) NG: 1.70
LPG: 1.00
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: 8 W, Automatic Frost Protection: 80 W
Water Supply Minimum operating pressure - 70 kPa
Nominal operating pressure - 150-830 kPa
Minimum water flow - 2.7 litres per minute
Weight 22 kg
Market Release 1985
Discontinued 1998
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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