Applications - Trucks The Autotherm Division of Enthal Systems, Inc. is a leading provider of fuel-saving, comfort-enhancing products to commercial fleets and owner-operators. Autotherm Division, Enthal Systems, Inc. 553 Capital Drive, Lake Zurich, IL 60047 Phone 847-726-1717 Fax 847-726-1414 Email dboyer@autothermusa.com