Thursday, February 9, 2012

Popular Short Science Articles : Allergies .. Stress .. Skin Cancer .. Coffee and Headache

Benefits of Mechanical Ventilation System

Natural ventilation has its shortcoming: on days when there is little wind, some parts of the house will be poorly ventilated; on cold days, the incoming air may be too cold for comfort; or you may have hay fever and need to shut windows during the pollen season. The effects of in­adequate ventilation include increased interior humidity and higher levels of interior pollutants.