Trane Air filtration system that removes 99.98% of airborne allergens down to .1 micron from the filtered air, making it 100 times more effective than a standard 1” filter. Trane CleanEffects also removes over 99% of the influenza virus from your home’s filtered air, according to research by the Harvard School of Public Health, in collaboration with scientists at Environmental Health and Engineering Inc. (EH&E).