An air purifier is a device used to filter air in order to clean it. Also known as air cleaners or air fresheners, they purify the air by removing pollutants from it. These pollutants include fine particles, allergens (animal fur, pollen, dust, mites, etc.), VOCs (Volatile Organic Compounds), odours, gases, fumes, bacteria, viruses and more globally, microorganisms. Polluted air is drawn into the purifier and then passes through a filter unit that captures and removes the pollution to release clean, healthy air into the room.