About this item

• GENUINE FILTER: For 411i Max and 411a Max air purifiers; genuine  F4MAX Replacement filter for 411 Max Series is designed for optimal performance; Not compatible with 411. 411+ and 411 Auto
• LET'S CLEAR THE AIR FASTER: HEPASilent dual filtration technology delivers more clean air faster and uses less noise and energy than HEPA filtration alone*
• LET'S CLEAR THE AIR BETTER: Removes at least 99.97% of tiny airborne particles like viruses and smoke down to 0.1 microns. and captures pet dander. pollen. mold allergen and dust; carbon filter traps light household odors from smoking. pets and cooking**
• MOST AWARDED AIR PURIFIER BRAND IN THE US***: Independently tested for performance. Zero Ozone; AHAM Verifide for Performance (CADR); Quiet Mark Certified; Ozone Safety Standards Certified by CARB; Zero Ozone Verified (<5 ppb) by Intertek Sustainability

Let's clear the air. genuine filter for 411i Max and 411a Max air purifiers.  genuine F4MAX Replacement filter for 411 Max Series is designed for optimal performance. Not compatible with 411. 411+ and 411 Auto. Subscribe to save on auto-delivered air purifier filter replacement.

*When similar CADR was measured. models with mechanical and electrostatic filtration achieved less noise with less energy than same models with only H13 HEPA mechanical filtration. **Tested PM 2.5 (0.1 - 2.5 microns) up to 90min in a 30m3 room. Tested to remove min. 99.9% of S. aureus. K. pneumoniae. P. aeruginosa. MS2. E.Coli. H1N1. A.Niger. ***Based on a survey of over 50 awards. accolades. and recommendations issued by independent consumer associations. media publications. and industry competitions from January 1. 2022. through January 31st. 2023. for products sold in the US by top 10 air purifier brands according to NPD Group Retail Tracking Service. Small Appliances. U.S. sales dollars Jan – Dec 2022.