Volatile Organic Compound (VOC) Sources are materials and products that emit organic chemicals into indoor air, affecting air quality and human health. Common indoor VOC sources include building materials, furnishings, cleaning products, adhesives, and paints. HVAC systems must filter and exchange air to manage VOC concentrations and maintain indoor air quality standards.
Common Indoor Sources
Formaldehyde comes from particle board and insulation. Paint, solvents, and varnishes emit benzene, toluene, and xylene. Carpeting, upholstery, and vinyl flooring release multiple VOCs. Office equipment and electronics contribute additional compounds. New construction experiences elevated VOC levels during the first 6 to 12 months as materials off-gas.
HVAC Mitigation Strategies
High-efficiency air filtration with activated carbon removes 50 to 80 percent of VOCs. Increased outdoor air ventilation rates dilute indoor VOC concentrations. ASHRAE Standard 62.1 recommends 15 cubic feet per minute (CFM) per occupant of outdoor air to control VOC levels.
Health and Performance Impact
Elevated VOC concentrations above 1,000 parts per billion (ppb) cause headaches, respiratory irritation, and cognitive impairment. Proper HVAC design with appropriate filtration and ventilation maintains VOC levels below 500 ppb and supports occupant productivity and well-being.