Winix WRF20UL Size 20 Ultimate Cassette; fits size 20 models plus 9500, 9000, 5300, 5000, 5000B
The "Ultimate" in filtration! Winix's very own Ultimate Filter Cartridge fits WInix Air Cleaner Models: WAC9500, WAC9000, WAC5000, WAC6300, WAC5500, WAC5300, and WAC5000B.

Extended US Warranty: 1 year limited warranty on defects in materials and workmanship.

Non-US Warranty: 30 days parts and labor.

Winix WRF10UL Size 10 Ultimate Cassette; fits size 10 models plus 9300, 9000S, 5000S
The "Ultimate" in filtration! Winix's very own Ultimate Filter Cartridge. Fits WInix Air Cleaner models: 9000S and 9300.

Extended US Warranty: 1 year limited warranty on defects in materials and workmanship.

Non-US Warranty: 30 days parts and labor.

Winix WRF20WH Size 20 Washable Long Life HEPA, (Carbon Pre-Filters sold separately) fits size 20 models plus 5300, 5500, 6300

Extended US Warranty: 1 year limited warranty on defects in materials and workmanship.

Non-US Warranty: 30 days parts and labor.

Winix WRF20HC Size 20 HEPA(1), Carbon(4) Combo Pack; fits model 5300, 6300
Our high quality True HEPA Filter and 4 advanced disposable carbon pre filters offer a full year's worth of filters. Fits WINIX Air Cleaner models WAC6300, WAC5500, WAC5300, WAC5000 and WAC5000B.

Extended US Warranty: 10 Years Mechanical, 1 Year Electrical, 90 Days Service labor on defects in materials and workmanship.

Non-US Warranty: 30 days parts and labor.

Winix WRF20CN Size 20 Sanitized Treated Replacement Carbon Pre-Filters use activated carbon to absorb chemical vapors and odors caused by cigarette smoke, pet odors, organic decay and cooking. SanitizedTM effectively reduces the development of bacteria, fungi and dust mites. Fit winix air cleaner models WAC5300, WAC5500, WAC6300, WAC5000, WAC 5000B. For use with Winix WRF20WH Washable HEPA Filters (sold separately). One year supply.

Non-US Warranty: 30 days parts and labor.