The Winix B Filter Cassette (114190) includes a washable Pre-filter, a true HEPA filter, and a washable activated carbon filter for a true full-year replacement filter cartridge. 

The washable Pre-filter defends against larger particles, while the True-HEPA filter captures up to 99.97% of particles as small as 0.3 microns.  The washable AOC Carbon Filter eliminates household odors

It was formerly known as a size 21 filter set. 

Filter Dimensions

Approximate filter size is 16.4"(H) x 12.5"(W) x 2.5"(D).

Compatible Models

• PlasmaWave 9500
• Signature U300 

Filter Features

• Simple installation
• Washable 
• Provides 1 year of filtration
• Absorb odors and capture the tiniest allergen particles in your space