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1450 Discovery Parkway, Alton, IL 62002
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Imperial is a world-class manufacturer of more than 7,000 heating, air conditioning, ventilation, and building products for residential and light commercial applications.  It has over 1,000 employees working in 800,000 square feet of manufacturing and warehousing space spread in facilities across North America.  It is an acknowledged innovator in the design and production of indoor air quality equipment for the North American heating, ventilation and air conditioning industry.