The MicroAirScreen™ is a window air screen that filters out allergenic pollen and dirt giving clean ventilation to your home or office. It can be left in windows even in rain storms. Originally designed for asthma and allergy sufferers, the MicroAirScreen™ is the most Advanced free flow window air filter available.
The MicroAirScreen™ is a patented window microscreen that filters out environmental contaminants such as pollen and dirt, letting in sufficient quantities of clean air without the use of fans or blowers. It also prevents the entry of rain even in storms. It buffers heavy gusts of wind and of course keeps out the smallest of insects. It is used even in winter to prevent "sick building" syndrome.