Wagner & Stern Air Purifier WA888 HEPA-13 Medical Grade Filter, Particle Sensor for 500 sq.ft. Rooms. Removes Mold, Odors, Smoke, Allergens, Germs and Pet Dander, etc. - Walmart.com
Amazon.com: Flintar H13 True HEPA Replacement Filter, Compatible with SilverOnyx 5-Speed Air Purifier KJ150F-C02, 4-in-1 H13 Grade True HEPA filter, For Large Room 500 sq ft (2-Set) : Home & Kitchen
Turonic PH950 - Hepa Air Purifiers for Home w/Humidifier, Large Room Air Cleaner up to 2500 Sq Ft, 8-Stage Purification w/True Hepa 13 Filter, UV-A Light & Ionizer, Smart Auto Mode, Wi-Fi
HEPA 13/Carbon Filter (2 Pack) (CAP-500FPK)
Medify Air Ma-25 Replacement Filter - Hepa Air Filter Replacement For Air Purifiers - Air Purifier Filter For Offices & Bedrooms - 2-pack : Target