Trane CleanEffects™ is the leader in air cleaning technology. It removes up to 99.98% of allergens from filtered air. It is up to 100 times more effective than a 1" filter. It can reduce your dust up to 50% and filters down to .1 micron. In some cases, Trane CleanEffects™ owners have been able to come off or lower asthma and allergy medications.