HVAC subsystems should be inspected and cleaned according to which document?

The correct answer is that HVAC subsystems should be inspected and cleaned according to the NADCA Standard ACR 2013 or its current edition. The NADCA (National Air Duct Cleaners Association) standard specifically provides guidelines and best practices for the inspection, cleaning, and maintenance of HVAC systems. This document emphasizes the importance of maintaining air quality and ensuring that HVAC systems operate efficiently, minimizing the risk of microbial contamination, which is a critical concern in the context of applied microbial remediation.

While the OSHA guidelines, EPA standards, and NIOSH recommendations may offer general information about occupational safety and environmental health, they do not provide the same level of detail and specificity for HVAC system cleaning and maintenance as the NADCA standard. Therefore, for professionals involved in microbial remediation and HVAC maintenance, adherence to the NADCA Standard ACR is essential for ensuring both compliance and effective treatment of contaminants within HVAC systems.