?Compatible Models?Flt4825 Hepa Filter B Is Extensively Compatible With G-Guardian Air Purifier Models Ac4825E, Ac4825W, Ac4850Pt, Ac4870, Ac4820, Ac4300Bptca, Ac4300Wpt, Ac4900Ca,Cdap4500Bca, Cdap4500Wca, P-Guardian Model Ap2200Ca, And Black Plus Decker Bxap150. | | ?H13 True Hepa Filter B?The Flt4825 Hepa Air Filters Capture 99.97% Of Particles As Small As 0.03 Microns. The Activated Carbon Pre-Filter Absorbs Smoke, Cooking Fumes, And Odors. | | ?Value Bundles?This Set Includes 4 X H13 True Hepa Filter B And 10 X Activated Carbon Filters. For Optimal Performance, Replace The Hepa Filter Every 6-8 Months And The Activated Carbon Pre-Filter Every 2-3 Months (Depending On Usage And Environment) To Maintain High Filtration Efficiency Over Time. | | ?Increased Efficiency Extended Lifespan?Our Hepa Filter B Is Made Of Eco-Friendly Non-Woven Fabric And Activated Carbon, Utilizing Advanced Low-Energy Technology For Reduced Wind Resistance And Improved Efficiency. The Enhanced.