B E

Hazardous Location and Industrial Duty Air Conditioners; Hazardous Location and Industrial Duty Heat Pumps; Chemical Filtration and Gas Phase Filtration Systems comprised of plumbing valves, filters and filtering devices for air and gas conditioning, and gas regulators; Ventilation and Pressurization Systems comprised of ventilating fans for hazardous and industrial location use, filters and filtering devices for air and gas conditioning, and gas regulators; Hazardous Location and Industrial Duty Exhaust and Ventilation Fans for Buildings and Enclosures