In the Box: 3 Honeywell HEPA Filter R R HEPA Filters: Captures up to 99.97% of airborne particles at 0.3 microns from the air that passes through the filter hepa Replace Honeywell HEPA Filters once every year HEPA Air Purifier Filters Fit Honeywell Console Models: HPA090 series, HPA100 series, HPA200 series, HPA250 series, HPA300 series, HPA3100-HPA3300 series, HPA5100-HPA5300 series and HPA8350 series For best performance, use only Certified Honeywell Air Purifier Filters Compatible air purifier filter replacements are not guaranteed to offer the same performance, efficiency or fit