)Pioneering efforts in Heating, Ventilating and Air Conditioning by the Holly division ultimately resulted in the development of [|Heat Exchanger technology for commercial and residential climate control.Lear Siegler was created as a result of a merger between the Siegler Corporation (Los Angeles) and Lear Avionics Inc. (Santa Monica) that was concluded in 1961, though leadership was substantially from the Siegler side of the merger.