An air scrubber is a portable filtration system that removes particles, gasses, and/or chemicals from the air within a given area. These machines draw air in from the surrounding environment and pass it through a series of filters to remove contaminants. Cleans, Freshens, Purifies. Indoor air can be 2-5 times more polluted than the air outdoors, but with an Air Scrubber, you'll enjoy ActivePure technology that cleans, freshens, and purifies the air around you. Protects Your Home. Reduces Allergy/Asthma. Symptoms.