Useful references:

  • Assessment, Cleaning and Restoration of HVAC Systems. NADCA. January 2013.
  • Building Air Quality: A Guide for Building Owners and Facility Managers. Appendix B, HVAC Systems and Indoor Air Quality. EPA/NIOSH. December 1991.
  • Is ventilation duct cleaning useful? A review of the scientific evidence. M.S. Zuraimi. Indoor Air 2010. Should You Have the Air Ducts in Your Home Cleaned? EPA. October 1997.
  • Ten Questions about Duct Cleaning. D. Jeff Burton. Occupational Health and Safety. May 2006.