According to NADCA ACR Standard for Assessment, Cleaning, and Restoration of HVAC Systems 2013
Determining the Need for HVAC Cleaning & Restoration
It is recommended that HVAC systems be cleaned when a proper HVAC cleanliness inspection or building
history indicates one or more of the following conditions exist:
· The HVAC system is contaminated with an accumulation of particulate;
· The HVAC system performance is compromised due to contamination build-up;
· The HVAC system has been determined to be a source of unacceptable odors;
· The HVAC system is discharging visible dirt or debris into the conditioned space;
· The HVAC system has been contaminated as a result of fire, smoke, and/or water damage;
· The HVAC system has been infested with birds, rodents, insects, or their byproducts;
· The HVAC system has been determined to be at risk for fire hazard;
· The HVAC system has become contaminated with construction debris or dust;
· Mold contamination conditions have reached either Condition 2 or Condition 3;
· Deterioration of fiberglass duct liner, duct board, or other porous components;
· As part of an HVAC maintenance program as defined in ANSI/ASHRAE/ACCA Standard 180;
· As part of the HVAC equipment manufacturers recommended maintenance practices;
· As part of a proactive energy management program;
· As part of a proactive indoor air quality management program;
· As a component to achieve LEED Certification;
· When a newly installed component or duct has been contaminated with construction and/or
other dust and debris.