HVAC/mechanical insulation products from CertainTeed Corporation, Valley Forge, PA, are now certified for superior IAQ performance -- specifically lower emission of contaminants -- by the Greenguard Environmental Institute. The Greenguard Environmental Institute is the world’s leading third-party guide to low-emitting home and office products and building materials. Greenguard uses a rigorous series of independent tests to provide specifiers and contractors with an authoritative guide to low-emitting products. CertainTeed’s Greenguard Certification confirms compliance with Greenguard Emission Standards which are based on criteria used by the State of Washington, the U.S. Environmental protection Agency, the Occupational Safety and Health Association, and the World Health Organization for total particle and volatile organic compound (VOC) emissions, including formaldehyde. The products now certified as low-emitting are duct liner, duct wrap, and duct board. For more information, visit www.certainteed.com.