See also:

• Business: Construction and Maintenance: Materials and Supplies: Mechanical: Air Distribution  (122)
• Business: Construction and Maintenance: Materials and Supplies: Mechanical: Heating, Ventilating, and Air Conditioning  (403)
• Science: Environment: Air Quality: Products and Services  (186)
• Science: Environment: Environmental Health: Products and Services  (32)
• Shopping: Home and Garden: Climate Control: Air Cleaners  (75)

• Airpak - Offers software for modeling air flow, thermal transfer, and contaminant distribution in ventilation systems and other indoor environments. Includes online demonstration, contact information, and sample output.
• Clean Air Delivery Rate - Explains this rating system for air cleaners and shows application examples. Also provides a tutorial about air cleaners.
• Healthy Home and Workplace Pty. Ltd. - Information about health issues relating to indoor living and working environments as well as safe housing and associated technologies.
• Indoor Environment Connections - Offers information about a trade magazine for commercial, industrial, and institutional building owners providing data about indoor environmental issues.