The most energy efficienct buildings are especially susceptible to sick building syndrome . As on an airplane, the same is is circulated over and over again and so are the pollutants that air contains. Fortunately, indoor air quality can be greatly improved by the use of proper filtration systems , which trap and remove the pollutants that build up in the air, and by the regular maintenance of your building's heating and cooling systems. All cooling and heating systems utilize some type of filter in their return air vents. They have no effect on pollen, micro-organisms, smoke or other similar pollutants.
Electrostatic filters are more effective than standard filters.
However, as they get dirty, they quickly become less efficient. To maintain efficiency, they should be hosed off on a regular basis. Because they can be cleaned and reused, they are more economical, in the long run, than the standard throw away filters. Electronic air cleaners produce the best results. An air cleaner actually draws the dirt out of the air, so your wallpaper and paint stay cleaner longer.