Honeywell Filter R True HEPA Replacement Filter, HRF-R1

True HEPA replacement filter captures an astonishing 99.97 percent of airborne particles as small as 0.3 microns to help you establish a cleaner breathing experience for you and those around you. Plus, its advanced design delivers cost-efficient performance by providing up to one year of filtration before replacement is required. Replacement Filter R is designed for use with Honeywell HPA090 series, HPA100 series, HPA200 series, and HPA300 series air purifiers (sold separately).

Price: 34.98 from Zuma Office Supply US