Indoor air contaminants from building materials are often the major source of complaints. The demand for materials with low-emission characteristics is on the rise, along with the need for more sensitive and reliable emission studies. Air quality and product testing standards need to be revised and updated to take into account not only health effects, but also comfort considerations, especially for hypersensitive occupants. Modern building materials, including sealants and adhesives emit a rainbow of contaminants at ambient temperatures. The bake-out and demand controlled ventilation techniques are some attempts in reducing emissions after the materials have been installed.