With The Weather Turning Cooler And Friends & Family Are Spending More Time Together Indoors, This Is What You Need To Keep The Indoor Air You Breathe Clean And Safe! Envion Allergy Pro AP450 Professional Air Purifier With True HEPA Filtration. It Is Brand New! The Box Was Only Opened To Show That It Is New And Has Never Been Taken Out Of The Box! This Model Sells For Almost $300. But I Will Let It Go For $100.