Winix FresHome Series Size 25 One-Year Ultimate Washable Cassette: 25WC

This one-year ultimate replacement filter set includes washable pre-filter, true HEPA filter, washable Advanced Odor Control Granular carbon filter and is treated with CleanCel Anti-Microbial coating. It is the standard replacement filter for the Winix U4

Winix FresHome Size 17 One-Year Replacement Filter Set: 17HC4

This set includes all the filters you’ll need for an entire year of filter changes for your Winix air purifier. The true HEPA filter lasts an entire year to capture particles from your indoor air. The carbon pre-filter lasts for three months, which means

Winix FresHome Size 21 One-Year Replacement Filter Set: 21HC4

This set includes all the filters you’ll need for an entire year of filter changes for your Winix air purifier. The true HEPA filter lasts an entire year to capture particles from your indoor air. The carbon pre-filter lasts for three months, which means

Winix FresHome Size 25 One-Year Replacement Filter Set: 25HC4

This set includes all the filters you’ll need for an entire year of filter changes for your Winix air purifier. The true HEPA filter lasts an entire year to capture particles from your indoor air. The carbon pre-filter lasts for three months, which means