Rinnai Slimline 18 MJ and 22 MJ


Range Discontinued
Discontinued 2009 and June 2012

The Rinnai Slimline is a flued radiant convector heater. Compact in size and easily installed on a wall or existing masonry cavity.

Suitable as a residential heating appliance, ideal for medium sized living rooms. Heats up to 42 m3, depending on where you live in NZ.

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Product Details

Gas type
22 MJ model available in NG or LPG, gas type specified at time of purchase. 18 MJ available in NG only.

The Rinnai Slimline is unable to be converted.

General clearances
The unit is not designed to be built into bookcases or shelves.

  • 150 mm clearance required top and sides
  • 1000 mm clearance extending in front of heater

Technical Specifications


18 MJ/h and 22 MJ/h


18 MJ: 1.4-3.2 kW
22 MJ: 1.4-4.0 kW


18 MJ = 61.4%
22 MJ = 66%


Simplex—single entry

Data plate

Right hand side of burner chamber assembly behind front panel

Flue spigot (round diameter)

18 MJ = Ø75 mm
22 MJ = Ø100 mm

Floor to centre of spigot - 515 mm

Gas connection

3/8 " BSP flare fitting with flare nut, situated:

  • 85 mm from floor
  • 140 mm from outside RH edge of case
  • 65 mm from rear
Gas control

One touch control


Piezo ignition


Rinnai multifunctional gas valve featuring Piezo ignition, flame failure device, pressure regulator, and pressure test point

Market release

October 1990


18 MJ - 2009
22 MJ - June 2012