The Rinnai INFINITY A-Series are continuous flow hot water systems for residential applications. These water heaters produce endless hot water, and unlike electric cylinders, are energy efficient as they are only on when you need hot water.
Four models to choose from depending on your hot water needs (A16, A20, A24, A26*). Use the Rinnai INFINITY model selector in the 'Suitable for' tab to work out which model is suitable for you.
* Model numbers represent hot water capacity, for example the A26 produces 26 litres of hot water per minute at a 25 degree Celcius rise.
• external residential applications only
• mains and medium pressure systems
Hard or acidic water will need to be treated to use this product.
- They are not suitable as a spa or swimming pool heater
- They are not suitable for hydronic applications
- They are not suitable as a gas boost for solar installations, or connection with an iHeat, as the temperature cannot be set high enough—use our HD or EF models instead
Available for Natural Gas or LPG. Specify gas type at the 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.
Clearance below eaves, balconies, and other projections is 300 mm.
* Rinnai recommend 1.5 m to give enough clearance for the pipe work, and to safely expel the flue gases.
If the maximum water flow for your household exceeds what is listed in the table for your region, two INFINITY units may be required. Please contact your local gasfitter for a recommendation.
Energy Star Rating
|Factory preset temp.||55 °C|
|Model code and REU numbers||
|Hot water capacity||
|Input and output||A16: Input: 16.3-124 MJ/h, output 27.4 kW|
|A20: Input: 19.9-156 MJ/h, output 33.9 kW|
|A24: Input: 16.3-184 MJ/h, output 41.4 kW|
|A26: Input: 16.3-199 MJ/h, output 44.2 kW|
|Exhaust system||Forced flue|
|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||A16: NG: 0.9, 1.50, LPG: 0.71, 1.09|
|A20-A26: NG: 1.08, 1.80, LPG: 0.73, 1.12|
|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).
Normal: 47 W (A16), 58 W (A20), 56 W (A24), 66 W (A26)
Standby: 2 W
Automatic Frost Protection: 68 W
Valve opens at 2060 kPa
Valve closes at 1479 kPa
|Noise level||50 dB(A)|
|NOx af||35 ppm|
|Safety devices||Flame failure, boil-dry protection, overheat protection, fusible link, pressure relief valve and combustion fan rpm check|
Nominal operating pressure:- 120-1000 kPa (A16)
- 160-1000 kPa (A20)
- 200-1000 kPa (A24 & A26)
Activation flow rate: 1.5 litres per minute
A16 = 13 kg, A20 = 14 kg, A24 and A26 = 15 kg
ES: Supplier Declaration of Compliance
• A16 - 1825920179
• A26 - 1825620179