Trane CleanEffects utilizes patented air cleaning technology to remove up to 99.98% of airborne allergens from the air that passes through the filter, making it eight times more effective than even the best HEPA room filters and up to 100 times more effective than a standard 1" filter. Trane CleanEffects has been performance-tested by LMS Technologies and Environmental Health and Engineering, Inc., and the results verified by professors from the Harvard School of Public Health.