The NADCA Air Systems Cleaning Specialist (ASCS) Certification Training Program can be undertaken to enhance your professional development. 

It is an in-person course, taking place over a day and a half.


This is a global credential, recognising knowledge and skills related to HVAC system hygiene.

For individuals:

The ASCS Certification can benefit you professionally in a variety of ways, including opportunities for increased compensation; enhanced career mobility and marketability; and increased recognition to employers, customers and industry peers.

For businesses:

Today, many job specifications require that a certified ASCS be on a project. Having an ASCS certified technician on staff can benefit your company by allowing you to meet bid specifications and in attracting more customers.


The ASCS Certification Training Program is an in-person course, run over a day and a half.

  • Day 1: ASCS Certification Training Program (full day)
  • Day 2: ASCS exam (3.5 hours)

This training covers the following:

Module 1

Module 2

Module 3

Module 4

Module 5

Overview of Heating, Ventilation and Air Conditioning Systems Cleaning

HVAC Systems Overview

Protecting the Health and Safety of Occupants and Building

Performing the Cleaning

HVAC Cleaning and Mould Remediation





Delivery method
Face to face or in-house


Day one: training program (8 hours)
Day two: exam (3.5 hours)


Maximum of 25 people per course date


Day two includes a formal assessment. Students are allowed 3.5 hours to complete the ASCS program exam.

Course materials

Each registered and fully paid course participant will receive the following course materials at least 30 days in advance of the training course date:

1. ASCS to the NADCA Standard ACR Course Booklet

2. ASCS to the NADCA Standard Course PowerPoint Presentation Handout

3. Link to the following ASCS reference materials:

  • ASCS Candidates Guide
  • ACR Standard
  • HVAC Inspection Manual
  • Introduction to HVAC System Cleaning
  • NADCA Safety Manual
  • NADCA White Paper on Chemical Applications in HVAC Systems.


The Australian Institute of Refrigeration, Air Conditioning and Heating (AIRAH) has signed a licencing agreement with the National Air Duct Cleaners Association (NADCA). As the exclusive training partner (licencee), AIRAH is able to deliver the Air Systems Cleaning Specialist (ASCS) Certification Training Program in Australia and New Zealand.

This Certification Training Program is internationally recognised. NADCA administers the certification process, including the marking of all course exams and the issuing of certifications.



NADCA: the HVAC Inspection, Cleaning and Restoration Association, otherwise known as the National Air Duct Cleaners Association (NADCA), was formed in 1989 as a non-profit association of companies engaged in the cleaning of HVAC systems. Its original mission was to promote source removal as the only acceptable method of cleaning and to establish industry standards for the association.

NADCA’s mission has expanded to include qualified companies engaged in the inspection, cleaning and restoration of HVAC systems. NADCA supports members' success with standards, education, certification, marketing and advocacy to promote ethics and the highest quality services. The goal of the association is for its members to be the number one resource for consumers and other entities seeking air duct cleaning and HVAC inspection, cleaning and restoration.

Read more

To review the frequently asked questions about the NADCA ASCS Certification Training Program, please click here.


NADCA members


Upon enrolment, AIRAH will confirm with NADCA the status of the course participant’s regular membership.

AIRAH members, with new NADCA membership


Upon enrolment, AIRAH will confirm with NADCA that the course participant is a member or is in the process of obtaining membership.

AIRAH members, without new NADCA membership





All listed prices are in AUD and include GST.

*Contingent on an AIRAH member signing their company up and being accepted by NADCA as a regular member, via the NADCA website.

Why should you consider a NADCA membership? Your ASCS Certification needs to be renewed on an annual basis. A company-based NADCA membership allows you to renew your individual-based certification at a heavily discounted rate.

Please refer to the section How to Renew ASCS Certification, for renewal fees and requirements. Note that all NADCA-listed pricing for membership and certification renewal is in USD.


Course dates

Online delivery

Tuesday, November 23 (full day)
9am–5pm AEST | 8.30am–4.30pm ACST | 7am–3pm AWST
Wednesday, November 24 (3.5 hour exam)

Class size
15 participants maximum.

If you are interested in the ASCS training program, please contact [email protected]


Request this course

Want to bring this course to your city/town? Please submit a request for consideration and/or to be put on the waitlist.

Request this course


Click here to view frequently asked questions about this training program.

For more information on AIRAH’s Australian and New Zealand offering of the NADCA Air Systems Cleaning Specialist (ASCS) Certification Training Program, please contact our national office at [email protected] or on 03 8623 3000.

 If you would like to request a date for this course in your city/town, click here.