When a condition 3 exists in one part of the HVAC system, which parts need to be cleaned?

When a condition 3 exists in an HVAC system, it indicates that there has been a significant contamination, typically associated with substantial water intrusion or microbial growth, leading to the presence of harmfully hazardous materials. In such situations, cleaning all parts of the HVAC system is essential, not just the affected areas.

The rationale behind this approach is that contaminants can spread throughout the entire system, including ducts, coils, filters, and other components. Failing to clean all parts can allow spores, mold, or pathogens present in contaminated areas to remain and potentially spread back into the indoor environment, posing health risks to occupants. Thorough remediation ensures that no residual contamination is left behind, therefore restoring the system to a safe and functional condition.

It is important to note that simply cleaning the affected parts, ducts, or assuming no cleaning is needed would not adequately address the risks posed by full system contamination. Comprehensive cleaning is crucial to maintain air quality and system efficiency following the identification of condition 3.