Discontinued Product, please contact 0800 RINNAI for more information

Discontinued Product, please contact 0800 RINNAI for more information

Rinnai INFINITY® XR-Series (XR16-XR26)

Discontinued 2011, superseded by the Rinnai INFINITY VT-Series

Rinnai INFINITY® XR-Series (XR16-XR26)

The Rinnai INFINITY XR-Series are temperature controlled continuous flow gas hot water heaters for residential applications. Factory preset to 55 °C.

Gas continuous flow is an energy efficient heating system as it's only on when you need hot water.

The XR26a / XR26ia models in the range were designed for aggressive water areas (such as Christchurch).

Suitable for
• external residential applications (XR16-XR26)
• internal residential applications (XR26i only)
• mains and medium pressure systems

Hard or acidic water will need to be treated in order to use this product.

Gas type
Available for Natural Gas or LPG (XR26ia was only available in LPG). Gas type specified at time of purchase.

The following diagram has been provided to assist you in determining where (and if) an external continuous flow water heater can be positioned. If in doubt, prior to purchase, consult a licensed gasfitter.





Factory preset temp. 55 °C
REU numbers
  • XR16: REU-V1620WG
  • XR20: REU-V2024WG
  • XR24: REU-V2426WG
  • XR26: REU-V2630WG
  • XR26a: REU-V2630WGT
  • XR26i: REU-VR2632FFUG
  • XR26ia: REU-VR2632FFUGT
Hot water capacity
  • XR16: 2.4-20 L/min
  • XR20: 2.4-24 L/min
  • XR24: 2.4-26 L/min
  • XR26: 2.4-30 L/min (incl. XR26a)
  • XR26i: 2.4-32 L/min (incl. XR26ia)
Input and output XR16: Input: 125 MJ/h, output 28 kW
XR20: Input: 160 MJ/h, output 35.6 kW
XR24: Input: 188 MJ/h, output 42 kW
XR26: Input: 199 MJ/h, output 44.6 kW
XR26i XR26ia: Input 195 MJ/h, output 44.5 kW
Exhaust system external units Forced flue
Flue internal units Balanced flued (room sealed appliance)
Frost protection Fitted as standard. Frost protection operates automatically, as long as the appliance is connected to the electrical power supply, by activating when the temperature inside the unit drops below 3.5 °C, and turns off once the temperature inside the unit reaches 7 °C.
Ignition system Direct electronic ignition
Injector sizes XR16 & XR20: NG: 0.85, 1.30, LPG: 0.70, 1.05
XR24 & XR26: NG: 1.0, 1.55, LPG: 0.70, 1.1.05
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 pressure down).
Power consumption operating

XR16  = 40 W (NG), 45 W (LPG)

XR20 = 47 W (NG), 51 W (LPG)

XR24 = 45 W (NG), 52 W (LPG)

XR26 = 52 W (NG), 57 W (LPG)

XR26i XR26ia = 65 W

Power consumption standby

all models 2 W

Power consumption automatic frost protection

72 W (XR26i XR26ia - 100W)

Pressure relief

Valve opens at 2060 kPa

Valve closes at 1470 kPa

Noise level 50 dB(A)
NOx af XR16 - 35 ppm, XR20 - 42 ppm, XR24 - 48 ppm, XR26 - 52 ppm
Safety devices Flame failure, boil-dry protection, overheat protection, fusible link, pressure relief valve and combustion fan rpm check
Water supply

Nominal operating pressure:

- 120-1000 kPa (XR16)
- 160-1000 kPa (XR20)
- 180-1000 kPa (XR24)
- 130-1000 kPa (XR26)

- 150-1000 kPa (XR26i XR26ia)

Activation flow rate: 2.4 litres per minute


XR16 / XR20 / XR24 = 15 kg, XR26 = 17 kg, XR26i XR26ia - 22 kg


ES: Supplier Declaration of Compliance

Declaration numbers:

• XR16 - 970820094

• XR20 - 971020094
• XR24 XR26 - 971120094

Market release 2006
Discontinued 2011

**For unit dimension information, please refer to p.9 of the installation manual**

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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