Discontinued Product, please contact 0800 RINNAI for more information

Discontinued Product, please contact 0800 RINNAI for more information

Infinity 20 External (REU-2020W)

Infinity 20 External (REU-2020W)

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 applications.

Hot water capacity
2.4 to 20 litres per minute.

Energy efficiency

Compatible controllers
• MC-33-A (kitchen)
• BC-45-2A (bathroom)
• BSC-45-2A (bathroom 2)

Suitable for
Suitable for homes with up to two bathrooms.

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

Colour: White
Input: 188 MJ/h
Efficiency: 80%
REU Number: REU-2020W


Connections Gas supply: R ¾ 20A (right)
Cold water inlet: R ¾ 20A (centre)
Hot water outlet: R ¾ 20A (left)
Dip Switch Settings Available 40, 43, 55, 60, 65, 75 °C
Hot Water Capacity 2.4-20 L/min at a 25 °C rise (1200 L/h)
Ignition System Direct electronic ignition
Injector Size NG - 1.70 mm, LPG - 1.00 mm
Line Pressure Min. NG - 1.13 kPa, LPG 2.75 kPa
Line Pressure Max. 3.5 kPa (max. 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.
Minimum Operating Pressure 150 kPa
Nominal Operating Pressure 150~830 kPa
Noise Level 49 dB(A)
Power Consumption Normal - 55 W, standby - 8 W, anti frost protection 80 W
Power Supply AC240 V 50 Hz
Remote Control Ideally suited to the following controllers:
• MC-33-3A kitchen control
• BC-45-3A bathroom control
• BSC-45-3A ensuite or second bathroom control
• MC-70-1A kitchen control
• BC-70-1A bathroom control
Safety Devices Flame failure: Flame rod
Boiling protection: 105 °C lockout thermistor (25 secs)
Remaining flame (OHS): 97 °C bi-metal switch
Thermal fuse: 129 °C
Pressure Relief Valve: Opens at 2100 kPa, closes 1500 kPa
Automatic frost protection: Bi-metal sensor & anti-frost heaters
Combustion fan rpm check: Integrated circuit system
Over current: Glass fuse (5 A)
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. 

Architects Portal

*Architects* Portal

Are you an Architect, Designer or Specifier?

We have everything you need to support your design process including CAD & BIM content. Check out everything you need from one easy Architects and Designers portal.

Enquire about a product

We’re happy to help with anything, big or small. Please fill out the short form below and we’ll get back to you within 24 hours.

Please enter your name Please enter your email address Please enter a subject Please enter a message