? Replacement Filter Compatible For Eva 4-Speed Evaporative Humidifier | | ?Replacement High-Efficiency Hepa Filter. Can Provide You With A Better Environment. | | ?H13 Grade Hepa Filter 99.7% Of Airborne Particles Down To 0.3 Microns In Size, High-Efficiency Activated Hepa, Filter All Sorts Of Smells And Smoke | | ?Please Replace Regularly To Keep Your Machine Fresh, Recommended To Change Filter Once Every 6 Months, Also The Air Purifier'S Usage Time Will Depend On The Environment Air Quality Around You. | | ?Energy Saving Air Filters Save Energy Due To A Low-Density Design And Requiring Less Pressure To Push Air Through The Filter | |