This efficient replacement carbon filter for the AllerAir® 5000 DX Exec Air Purifier fits the AllerAir 5000 series. It uses a deep bed activated carbon canister for effective removal of airborne odors, gases, and chemicals. Regular replacement of filters is essential to maintain the 3,375 surface area ac. efficiency for which the 5000 is known. The filler material use is 27 lbs. of wide-spectrum gas and odor carbon. The unit for which this replacement is designed is built to deal with very heavy concentrations of odors and chemicals in confined spaces. It provides the widest available range of air purification and its HEPA filter traps a rated 99.97 percent of airborne solid particles, including viruses, bacteria, and allergens. The unit also provides an easy-clean pre-filter.