Gentherm Incorporated, formerly Amerigon, is an American thermal management technologies company. Gentherm created the first thermoelectrically heated and cooled seat system for the automotive industry. Called the "Climate Control Seat" system, it was first adopted by the Ford Motor Company and introduced as an option on the model year 2000 Lincoln Navigator in 1999. Today it is available on more than 50 vehicles sold by Ford, General Motors, Toyota, Kia, Hyundai, Nissan, Range Rover and Jaguar Land Rover. Currently, the company is a developer and marketer of thermal management technologies for heating and cooling and temperature control devices for a variety of industries. Gentherm is publicly traded on Nasdaq under the symbol THRM and is headquartered in Northville, MI. Gentherm's thermoelectric technologies are based on the Peltier Effect, the 1834 discovery that passing an electric current through a sandwich of two dissimilar metals will make them hot on one side and cold on the other. Wikipedia