Infinity 28I Internal Hot Water Heater

Australia’s favourite system can now be fitted indoors.

Specifically engineered for internal domestic installation, the Rinnai Infinity 28i is ideal for replacing aging internal storage cylinders with a modern solution in 1-2 bathroom homes (1-3 for warmer climates). 

Utilising our dedicated co-axial flue system, the energy efficient unit can be installed almost anywhere and no power is consumed until you turn a tap on. This combined with an impressive 6 star energy rating, means you get superior comfort for less money. 

The slimline unit not only saves you precious internal space but also offers precise temperature control display, enhanced electronic safety monitoring and puretemp™ stability control.

Customise and complete your Infinity 28i system with our comprehensive range of hot water controllers to enhance your hot water experience

  • Category
    Gas Water Heaters
  • Range
  • Brand
  • Installation
    Professional installation required
  • 6 Star Equivalent Rating
    ‘Room sealed’ appliance
  • Low running costs
  • Highly efficient
  • Low greenhouse gas emissions
    Superior technology
  • Quality Japanese design and manufacturing
  • Precise temperature control for safety and convenience
  • Compact design allows installation flexibility
  • Suitable for higher ambient water temperatures
  • Compatible with low flow rated shower fixtures (3 Star - 7.0 to 9.0 l/min)
    Rinnai quality
  • After-sales support
    The product information on this website (comprising product brochures, warranty information, installation manuals, diagrams, specifications and representations) relates to current products. This information may be different for superseded products. For superseded products please contact Rinnai to confirm product information.
Hot Water

Rinnai has an extensive range of hot water systems that cater for all Australian households. Each range has specific and unique benefits including high efficiencies, water conservation, safety, versatility as well as guaranteed reliability.

Continuous Flow Hot Water

In the early 90s Rinnai forever changed the way Australians enjoyed hot water, with our launch of the country’s first fully electronic gas continuous flow hot water systems. It was a revolutionary leap that provided total confidence and comfort by knowing that your hot water would never run out. We called it Rinnai Infinity.


Designed with the environment in mind and with leading efficiencies across the range, low emission burners, Puretemp™ temperature control technology and better water conservation technology. The Rinnai Infinity takes comfort  to a new level.

Get in touch
Looking for support? Please get in touch and let us help.
Visit Website

About the

For over 50 years, Rinnai has provided Australians with the comfort, convenience and reliability of our appliances. Our innovative products are designed with the environment in mind, with low-emission technology and high efficiencies, as well as a host of other great features.

At ArchiPro we recognise and acknowledge the existing, original and ancient connection Aboriginal and Torres Strait Islander peoples have to the lands and waterways across the Australian continent. We pay our respects to the elders past and present. We commit to working together to build a prosperous and inclusive Australia.