A NSW Government website

Heating, ventilation and air conditioning (HVAC) guide

Heating, ventilation and air-conditioning (HVAC) are major contributors to a business’s energy use and operating costs.

HVAC optimisation looks for the best ways of using existing systems, rather than opting for large-scale equipment upgrades and replacements.

Optimisation can be done by:

  • changing algorithms
  • altering control schedules and set points
  • carrying out minor mechanical repairs and alterations.



This guide outlines 20 HVAC optimisation strategies and how they can be applied to most commercial systems in older and modern buildings.

For a simple summary of the technology:


HVAC optimisation will reduce your energy bills

By taking action you could save up to 50% of your total HVAC energy use, or up to 80% of energy use in individual HVAC systems. In many instances, optimisation can provide immediate reductions in energy usage and costs.

Other benefits can include:

  • more comfort for a building’s occupants
  • improved reliability of systems
  • reduced maintenance costs
  • improved building performance, as recognised in rating schemes such as National Australian Built Environment Rating System (NABERS) and Green Star.

Energy efficiency HVAC for business training

We also offer training courses on making your HVAC systems more energy-efficient. When you attend a course you will receive post-training support to help you implement HVAC optimisation at your site.