Standard Installation Guide - Hewitt Trade Services



Hints and Tips for Air Conditioning


A Back to Back installation is deemed to be an installation where the indoor and outdoor units are installed on the same external wall with a maximum 3 meter run between the indoor unit and the compressor in a low-set home or building.





What is a Standard, Back to Back Installation?

  • The Indoor Unit is installed on or against an external wall
  • The outdoor unit is installed on an existing flat and level surface
  • Maximum refrigerant pipe length between the Indoor unit and outdoor unit is 3 meters
  • Maximum drain length of 5m
  • Maximum power circuit length of 20m
  • Includes capping and isolating switch as per AU Standards


What is Not Included in a Standard Installation?

  • Any additional parts or extra costs
  • Switchboard or mains power upgrades