In addition to ventilation, indoor temperature and humidity conditions, which can change both diurnally and seasonally, have the potential to substantially affect the emissions of VOCs from building materials and alter occupant exposure. In large-scale chamber experiments with new carpet systems, sheet vinyl flooring and wall paint, the air temperature was increased from 23 o C to about 30 o C over a period of 60 h (Hodgson, 1999). Concentrations and emissions of the target VOCs quickly increased in response to heating; upon termination of heating, they quickly returned to levels measured in control experiments without additional heating (ibid.). .
