Kaz - Honeywell True HEPA Filter HRF-H1 Type: Replacement Filter Used For: Air Purifier Allergen Reduction: Yes Feature: Honeywell Allergen Remover Replacement HEPA Filter for Honeywell HEPA Tower Air Purifiers help to capture 99.97% of microscopic allergens such as mold spores, pollen, dust, smoke, and pet dander as small as 0.3 microns Filter H Replace once a year Specification: Compatible with Honeywell HEPA Tower Air Purifiers: - HPA-050 - HPA-150 - HHT-055 - HHT-155