Rating 6.1

Infinity 26 (Internal)

Australia’s favourite system can now be fitted indoors.

The Rinnai INFINITY 26i is a continuous flow system that’s designed specifically to be installed internally. Requiring a separately purchased flue kit, the 26i is ideal for replacing an old internal storage cylinder with today's technology. Utilising our dedicated co-axial flue system allows the INFINITY 26i to be ‘room sealed’, meaning it can be installed almost anywhere.

6.1 Star equivalent energy rating*

Never runs out of hot water

Precise temperature control for safety and convenience

Status operation Monitor

12 Year Heat Exchanger warranty

Puretemp™ temperature stability technology

6.1 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
  • 12 year warranty on Heat Exchanger

* Star rating applicable to 2013 series product only. Independently calculated using Australian Standard AS4552.  AS4552 limits the rating shown on the energy label to 6.0 Stars.  Where the calculated rating of Rinnai appliances exceeds 6.0 Stars it is designated as an “equivalent” rating.

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 This information may be different for superseded products. For superseded products please contact Rinnai to confirm product information.


Dimensions (mm) : Height


Dimensions (mm) : Width


Dimensions (mm) : Depth




Factory Default Temperature (Celsius)

50 or 60

Water Pressure (kPa) : Minimum


Water Pressure (kPa) : Maximum


Gas Rate Min/Max (Mj/h) : NG


Flow Rate 25 Degrees C/Max : l/min


Star Rating

6.1* Equivalent

Connection Sizes Gas/Hot/Cold (mm)


Status Monitor


Dimensions (mm) : Height Inc Brackets


Dimensions (mm) : Hot Water Outlet (From Wall)


Dimensions (mm) : Hot Water Outlet (Left from Centre)


Dimensions (mm) : Cold Water Inlet (From Wall)


Dimensions (mm) : Cold Water Inlet (Left from Centre)


Dimensions (mm) : Gas Connection (From Wall)


Dimensions (mm) : Gas Connection (Right from Centre)


Dimensions (mm) : Gas Connection Length (From Base)


Dimensions (mm) : Cold Connection Length (From Base)


Weight (kg)



  • Where to buy?

    Where to buy?

    You can use the store locator on our website to find your closest store.

  • What flueing is required?

    What flueing is required?

    Please refer to the flue installation manual available as a download on the relevant product pages.

  • What does the energy Star rating mean?

    What does the energy Star rating mean?

    Generally, the more stars, the higher the energy Star rating, the more energy efficient the product is.

  • Which hot water system suits my needs?

    Which hot water system suits my needs?

    You can use Rinnai’s hot water selector listed on this website to help you in your selection.

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