?Compatibility?: This 511I Max Replacement Filter Is Fully Compatible With Blueair Hepasilent Air Cleaner, Blue Pure F5Max, And Model Blue Pure 511I Max. | | ?Attention Please?:This Filter Is Only Compatible With Blueair Hepasilent Air Cleaner, Blue Pure F5Max, And Model Blue Pure 511I Max. Not ?Compatible With 211+ And 211+ Auto, 411I Max, 411A Max,511, 311, 121, Or Other Models, Please Check The Model Number Before Placing The Order. | | ?High Efficient Filltering??The Hepa Filt-Er Clean At Least 99.97% Of Tiny Airborne Particles Like Smoke Down To 0.1 Microns, And Cleans Pet Dander, And Dust, The Activated Carbon Filt-Er Cleans Up Light Households From Smoking, Pets, And Cooking Fume | | ?Performance Peak??For Your Machine Performance Peak, Based On Actual Usage The Filter Should Be Replaced Every 6 Months, It'S Easy To Install, And No Tools Are Required. | | ?We Treasure Our