Poor indoor air quality has been identified as a cause of illness and loss of productivity in the workplace. The term "sick building syndrome" was first used to describe a range of nonspecific complaints reported by occupants of buildings. These complaints include headaches, eye irritation and nose and throat irritation. Poor indoor air quality is caused by various pollutants including VOCs, formaldehyde, pesticides, tobacco smoke, plasticizers, and carbon monoxide; mold and allergens resulting from excessive moisture and poor maintenance; improper control of building temperature and humidity; and insufficient ventilation.

VOCs are common in the indoor environment and can be emitted from sources such as cleaning compounds, wood products, stains, waxes, paints, and other coatings, fabrics, foam, adhesives, polypropylene, pressed wood products, stain and fire resistant coatings, carpet and other flooring materials, draperies and coverings, wallcoverings, room/cubicle partitions, fiberglass, adhesives, construction materials, personal toiletries, and through activities such as cooking.

Products were tested using stringent environmental chamber protocols were and found to contribute minimal levels of pollutants to the indoor environment. In order to be included on the list, products must meet the indoor air quality standards and guidelines established by: 

• United States Environmental Protection Agency 
• State of Washington 
• World Health Organization 
• German Federal Environmental Agency (Blue Angel)

The programs have established acceptable emission rates for total volatile organic compounds (TVOCs), formaldehyde, total aldehydes, ozone, and particles.