ACR 2005,

ACR 2005, the third edition, went further than any previous
NADCA standard. It covered the same essential elements
of assessment and cleaning detailed in the previous
documents and also provides more detailed requirements
for managing HVAC system cleaning projects, including
clearly defined conditions that require cleaning. ACR 2005
was revised such that its requirements were in accordance
with the latest standard for mold remediation published by
the Institute of Inspection, Cleaning and Restoration
Certification (IICRC), S520 - Standard and Reference
Guide for Professional Mold Remediation. By working in
cooperation with representatives from IICRC and other
industry organizations to update the ACR standard, the
2005 edition was a standard that could be utilized not only
as a standard for professional HVAC system cleaning
contractors, but also as a comprehensive reference source
for consumers, facility administrators, engineers, mold
restoration contractors, general contractors, architects, or
HVAC project design consultants