HONEYWELL PRE- FILTER REPLACEMENT – This 4-pack (one-year supply) of certified Honeywell HRF-A200 “A” Pre-Filter air purifier filters helps capture larger particles such as dust, lint, fibers and pet fur, to extend the life of your HEPA filter. WORKS WITH HONEYWELL AIR PURIFIERS FOR HOME - “A” air purifier filters work with Honeywell 200 series HEPA air purifiers, and are pre-cut to fit the Honeywell HPA200, HPA201-TGT, HPA204, HPA250 and HPA5200. Replace every 3 months for best performance. BRAND RECOMMENDED BY ALLERGISTS – Honeywell Air Purifiers, The Doctor’s Choice, the 1 brand recommended by allergists. Honeywell air purifiers are a trusted partner in the fight against airborne particles. COMPATIBLE DOES NOT MEAN COMPARABLE – For best performance, use only genuine Honeywell air purifier filters. Compatible air purifier filter replacements are not guaranteed to offer the same performance or efficiency. EFFECTIVE AIR CLEANING AND CIRCULATION – A Honeywell Air Purifier filters and circulates air up to 4.8 times an hour – 120x per day for its stated room size. You can breathe easy knowing the air in your home is fresher, cleaner and has fewer allergens.