Hop over to Amazon and get a deal on LEVOIT Core400S-P Air Purifier 3-in-1 Replacement Filter. It is highly recommended to use this officially designated replacement filter to keep your Core 400S-P/Core 400S air purifier at its best working efficiency and capacity, breathing fresher and cleaner air all the time. Ultra-fine Nylon Pre-Filter captures large … Continue reading LEVOIT Core400S-P Air Purifier 3-in-1 Replacement Filter as low as $37.99 Shipped Free (Reg. $50) – LOWEST PRICE