In closed spaces where doors and windows are not opened for a long time, such as the interior of airplanes and trains, the risk of air pollution will also increase. Air purification devices usually use filters to filter air. Due to the size and power consumption, it is difficult to realize other methods such as UV mercury lamp to achieve purification.

With compact structure and low power consumption, deep UV LEDs help to achieve a safer and more comfortable space when combined with filters. In addition, deep UV LEDs are mercury free and therefore harmless to humans.