Discontinued Product, please contact 0800 RINNAI for more information

Discontinued Product, please contact 0800 RINNAI for more information

Rinnai iHeat

Rinnai iHeat

The Rinnai iHeat is a ducted home heating system that uses hot water from your Rinnai INFINITY* continuous flow water heater to warm air and circulate it around your home. The Gas central heating system can also be zoned to only heat the areas you are using. Zoning kits are available from ducting suppliers, refer p. 2 of the 'Ducting Guidelines' PDF at the bottom of the 'Technical' tab.

Whole home heating that is fast and efficient
With the same high efficiency as your Rinnai INFINITY continuous flow water heater and heat output of 20 kW, the Rinnai iHeat will be efficient and fast at heating your home.

How it works


The Rinnai INFINITY* provides hot water to the iHeat air handler unit (heat exchanger). The heat exchanger extracts the heat from the hot water and transfers it to a steady stream of air. This air is fed into the ducting system and is distributed into each room.

* The Rinnai INFINITY A-Series is not suitable for use with an iHeat as the  system cannot be set high enough to run both hot water and heating.
Made in NZ

Suitable for
Homes with a gas connection and an existing Rinnai INFINITY* (or planned installation of a continuous flow hot water unit).

Homes where the iHeat unit can be installed in a ceiling space, or under the floor—subject to the clearances shown below. The unit cannot be positioned outside.
• Heating area: Up to 250 m² (depending on where you live)
• Number of outlets: 3-12 (each outlet provides approx.1.8 kW)

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

* The Rinnai INFINITY A-Series is not suitable for use with an iHeat as the  system cannot be set high enough to run both hot water and heating.

The iHeat should be positioned so that the LED's are easily visible through the window of the control board. Avoid positions that make access to the iHeat and removing components difficult.

• Above unit: 450 mm minimum
• Sides of unit: 750 mm minimum
• Front and behind unit: 1 m minimum


Energy Efficiency Approx. the same as the Rinnai Infinity—over 80% depending on the Infinity model and ducting used.
Heating Area Up to 250 m² (depending on where you live and how well insulated your house is).
Minimum Pipe Size 20 mm external diameter pipe
Noise Level: Fan Fan: 40-50 dB(A).
From various charts on the Internet 40 dB(A) is the same as standing 1.5 m away from a refrigerator.
Please note:
If the system is balanced properly the fan noise will be neglible.
Noise Level: Rinnai Infinity 50 dB(A) approx.
Number of Outlets 3-12, each outlet provides approx. 1.8 kW
Nominal Electrical Consumption Does not include the Rinnai Infinity.
• Heating Fan Hi: 710 W
• Heating Fan Lo: 300 W
• Air Circulation Fan Hi: 580 W
• Air Circulation Fan Lo: 165 W
Power Output Nominal 20 kW, maximum 25 kW (depending on installation). Power output of fan is 0.6 kW.
Return Air Intake Min. size is 1500 cm².
Return air filter is mandatory.
Spigot Size • Supply air: 300 mm ID
• Return air: 350 mm ID
Approx. external diameter of return air ducting—430 mm.
Weight Total shipping weight approx. 56.4 kg
Market Release February 2013
Discontinued August 2018

Additional dimensions
• Approximate end-to-end measurement = 1135 mm
• Total height of unit with a suspended mounting kit is 910 mm
• Total width of unit is 790 mm—this includes the control box.

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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