HVAC Maintenance – What Are Your Obligations?

The responsibilities of a facility manager relating to the ongoing maintenance of a buildings’ HVAC system are clearly outlined in the applicable Australian standard – AS/NZ 3666.2:2011.

The title of this standard is “Air-handling and water systems of buildings – Microbial control Part 2: Operation & maintenance“. As the title indicates, it’s critical that HVAC systems and air-handling systems are maintained in order to control microorganisms accumulating in building air systems.

The standard explicitly mentions the following 5 parts of an HVAC system that must be part of a maintenance program:


Frequency  – Monthly

Inspect, clean or replace where necessary.


Frequency  – Monthly

Inspect, clean or replace where necessary.


Frequency  – Monthly

Inspect, clean or replace where necessary.


Frequency  – At least every 3 Months

Inspect, clean or replace where necessary.


Frequency  – Depending on component between 1 Month & 12 months

Inspect, clean or replace where necessary.

Components include:

  • Coils
  • Trays & Sumps
  • Condensate drains, tundishes & traps
  • Ductwork
  • Fans
  • Terminal Units
  • Supply air outlets
  • Return air & relief air grilles

The standard also outlines the need for the existence of Maintenance Manuals and Maintenance Records.

The Maintenance Manual should include details of the maintenance management program including plant servicing, cleaning schedules, and replacement periods for equipment items and components.

Maintenance Records should include:

  1. Date and nature of service performed.
  2. Results of periodic testing.
  3. Details of defects found and remedial procedure undertaken.
  4. The name of the person and company performing the service.

Maintenance manuals and Maintenance Service Records shall be readily available at the site for inspection by regulatory authority upon request.

For the purpose of maintenance management, the maintenance service records shall be retained for a period as required by the regulatory authority.

Clean Air Filtration Services can manage all your HVAC maintenance requirements. We can maintain Maintenance records and ensure that your building, hospital or factory is compliant.

Top 4 Reasons To Clean Your Air Ducts

  1. Protect against sickness
  2. Protect against litigation
  3. Protect against fire
  4. Reduce HVAC Operating costs

Our Preventative Maintenance Process

  1. Systematic Video Inspection
  2. Conduct Air Quality Tests
  3. Make Recommendations
  4. HVAC Cleaning
  5. Present comprehensive Final Report

Benefits of Duct Cleaning

  1. Reduction in Dust
  2. Reduction in Bacterias and Allergens
  3. Superior Indoor Air Quality