Rinnai INFINITY® Composite Recess Box


Discontinued September 2018

An affordable alternative to the Rinnai Metal Recess Box. The composite recess box enables a Rinnai INFINITY external gas water heater to be partially recessed into an external wall, covered, and out of sight. 

The unit protrudes approximately 120 mm from the framing it is mounted to. The protrusion from the finished wall will depend on the cavity depth (if any) and the cladding thickness.

Technical Specifications

Product code




  • Recess box body - 10844
  • Flashing collar - 10837
  • Recess cover (door) - 10838
  • Screw pack (8 screws) - 10836
  • Grommet - 9543
  • Lower bracket A-Series - 11148*

* For Rinnai A-Series models the existing bracket on the water heater needs to be replaced with the bracket provided in the recess box kit. This allows the water heater to line up with the fixing holes of the recess box


September 2018

Suitable for these products

It is designed for new build installations as installation needs to commence during the framing stage, before internal linings, claddings or building wrap is applied.

  • Minimum framing depth of 88 mm
  • Installation with an external A-Series, VT-Series, or XR-Series water heater

It is not suitable for fire rated walls.

A Rinnai INFINITY inside a recess box operates at a slightly louder level than a unit installed on an outside wall. Please bear this in mind when positioning near a bedroom as the operating noise could affect some people.

Building code compliance
Local authorities may have their own additional requirements regarding this type of installation. If in doubt over compliance with the building code, it is advisable they are consulted prior to installation.