NADCA Air Systems Cleaning Specialist Certification Training Program

NADCA Air Systems Cleaning Specialist (ASCS) Certification Training Program

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

Why enrol?

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About this course

AIRAH has signed a licensing agreement with the National Air Duct Cleaners Association (NADCA) as the exclusive training partner (licensee) of the Air Systems Cleaning Specialist (ASCS) Certification Training Program in Australia and New Zealand.

The NADCA ASCS Certification Training Program is an internationally recognised program run over a day and a half. It includes the ASCS Certification Training Program (day one) and the ASCS exam (day two).

NADCA administers the certification process, including the marking of all course exams and the issuing of certifications.

View frequently asked questions about the NADCA ASCS Certification Training program.


NADCA logo 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.

  • Module 1 – Overview of heating, ventilation, and air conditioning systems cleaning
  • Module 2 – HVAC systems overview
  • Module 3 – Protecting the health and safety of occupants and building
  • Module 4 – Performing the cleaning
  • Module 5 – HVAC cleaning and mould remediation
This course is designed for...

  • NADCA recommends at a minimum that an owner, principal, or key employee of a company become a certified ASCS



course delivery
Delivery method
face-to-face or online

online delivery
Course length
Day one: Training program (8 hours)
Day two: Exam (3.5 hours)

Day two of the NADCA ASCS Certification Training Program includes a formal assessment. Students are allowed 3.5 hours to complete the 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

Why enrol?

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.

AIRAH training advantages

For information on the benefits of AIRAH training, please click here.


AIRAH face-to-face training AIRAH offers face-to-face training opportunities to assist with your professional development in the HVAC&R building services industry.

No dates are currently scheduled
Please check back again soon. 
Registrations will open soon

AIRAH online training The online delivery of the NADCA ASCS Certification Training Program is presented as a live Zoom session and is limited to a maximum of 15 participants. Participants should have a stable internet connection and a laptop or desktop computer with webcam and good audio. To allow for questions and engagement, we strongly recommend you have also access to a microphone.             

No dates are currently scheduled
Please check back again soon. 
Registrations will open soon

Course fees

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 $1,995
Non-members $2,295
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.

AIRAH members save on registration fees for our programs and courses. Not a member yet? Join today to take advantage of a range of benefits for professionals and practitioners in HVAC&R building services. This includes access to essential industry resources (such as the AIRAH Technical Handbook, DA manuals, weekly industry news email, and Ecolibrium – AIRAH’s official journal), as well as free/discounted member rates for our division events, conferences, forums, webinars, and other offerings.

For more information on AIRAH member benefits, please click here.

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



Please view the NADCA ASCS Certification Training Program frequently asked questions or email AIRAH at [email protected] for more information.