The Rinnai INFINITY N-Series are condensing gas continuous flow water heaters designed for commercial applications and high hot water demand residential installations.
Available as an external unit (N56kWe) or an internal unit (N56kWi).
External commercial and residential applications (N56kWe external model only).
Internal commercial and residential applications (N56kWi internal model only).
Mains and medium pressure systems. Hard or acidic water will need to be treated to use this product.
Utilises a secondary heat exchanger to drive further thermal efficiency by extracting heat from combusted flue gases, making the N-Series models 97% efficient.
- as spa or swimming pool heater
- for hydronic applications
- for domestic ring main applications1
1 The N-Series internal pump controller is not suitable for domestic ring main applications as it does not allow the system to turn off. This means the ring main continually operates, which can cause high energy use and cost, and can be a noise nuisance, especially at night, when people are sleeping. We do however have a plumbing configuration solution if a domestic ring main is required, click here for more information.
Available for Natural Gas or LPG, specify at the time of purchase
55 ºC* (can be preset to deliver up to 85 ºC**)
* Models made before May 2020, serial number before 20.05000001 were preset to 75 ºC
** Maximum temp. for circulating systems is 65 ºC
1.5-37 litres per minute. Nominal water capacity is 32 litres per minute at a 25 ºC rise (1920 L/h)
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.
Direct electronic ignition
NG - 1.13kPa, LPG - 2.75 kPa
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.
Nominal operating pressure: 300-1000 kPa
Minimum operating water flow will depend on setpoint and inlet temp.
Internal models 49 dB(A), external model 54 dB(A). Some people are susceptible to low level noise. This needs to be considered if locating an appliance near a bedroom.
Less than 50 ppm
Co/CO2 for nominal conditions:
Energy Safety Supplier Declaration of Compliance: Declaration number - 1911920196
Can an N-Series be used to replace am older unserviceable Rinnai INFINITY in a bank of electronically connected appliances?
Yes, as long as the N-Series is a secondary unit and not the primary. Refer to the N-Series Connection to Older Models document in the Downloads Tab for more information (only accessible to TradeSmart users).
Our smallest most affordable model. This controller can be installed anywhere in the house.
Will run a bath for you, turn off the water, then tell you when it's ready.
Designed for kitchens and laundries, works in conjunction with the Bathroom Deluxe Controller.
A sturdy security bracket can be installed to act as a permanent deterrent to thieves
A switch intended to be connected to a monitoring system such as a BMS to highlight when there is an active error in the water heater
The N56kWi internal flue diverter is a flue accessory kit that allows the flue terminal position to be moved up and away from the air intake by up to 1.5 m
With the use of the cascades cable connection(s), up to 24 water heaters can be electronically connected
The Rinnai INFINITY N-Series 2 m pump cable will control a circulation pump in a commercial ring main application
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