INDOOR AIR QUALITY
TOPIC: AIR DUCT CLEANING
ISSUE:
Air duct cleaning will improve indoor air quality (IAQ) with both human and operational
benefits.
BACKGROUND:
This design alert is in response to inquiries from several VAMCs concerning air duct
cleaning of their existing systems.
RECOMMENDATIONS:
1. The National Air Duct Cleaners Association (NADCA) has published three
documents about professional HVAC system cleaning:
Understanding Microbial Contamination in HVAC Systems;
Introduction to HVAC System Cleaning Services; and
NADCA Standard 1992-01, Mechanical Cleaning of Non-Porous Air Conveyance
System Components.
These documents can be obtained from:
National Air Duct Cleaners Association
1518 K Street, NW, Suite 503
Washington DC 20005
(202) 737-2926
FAX (202) 347-8847
Web site: http://www.nadca.com/standguide.htm
2. Make sure the contractor hired, agrees to perform work in accordance with NADCA
Performance Standard 1992-01 and is a certified member in good standing of NADCA.
3. Ensure the contractor provides before-and-after documentation.
4. Ask to see a cleaning specification, methods proposed for cleaning. Contractor
should provide a Material Safety Data Sheet for each chemical.
5. Ensure the contractor uses only equipment with HEPA filters to protect the indoor
environment.
FOR ADDITIONAL INFOR MATION:
Contact Satish Sehgal at 202-565-5032, Kurt knight at 202-565-4980, or sat
Gupta at 202-565-5268.
11 December 1997
FM-187C-DA79
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