Nispira Collapsible True HEPA Particle Activated Charcoal Filter Replacement Compatible with Blueair Blue Pure 121 Large Air Purifier 620 SQ.FT | Remove Smoke VOCs nispira Upgraded Multi-Layer Design: Features enhanced

Upgraded Multi-Layer Design: Features enhanced filtration layers with increased carbon density for longer-lasting performance and consistently clean water

Regular cleaning on the filter is highly recommeded to improve the suction

3 microns in the air

Premium HEPA filter replacement with activated carbon for XJ-3800 Air Purifier

Suggested to replace every 12 months for optimal performance

Nispira Collapsible True HEPA Particle Activated Charcoal Filter Replacement Compatible with Blueair Blue Pure 121 Large Air Purifier 620 SQ.FT | Remove Smoke VOCs nispira Upgraded Multi-Layer Design: Features enhancedNispira premium filter set compatible with Blueair Blue Pure 121 Large Air Purifier for 620 SQ. FT High quality HEPA filter captures 99. 97% of airborne particles size down to 0. 3 microns. Activated charcoal filter helps deodorize any unfavorable household smell and removes chemical VOCs Flat dimension: 19. 37" x 20. 25"x 3". Expanded dimension: 11. 6" x 11. 6" x 19. 37". Suggested to replace every 6 months for best performance. 100% customer