Almost 40 years ago (founded in 1964 by Mr. Prawit Kiatsinsap), we started as SongSerm KarnChang, as well-known as SongSerm Air, an entrepreneur in home, office and car air-conditioning business. Few years later, we started our product lines in producing finned and tube heat- exchangers. In 1991, SongSerm KarnChang was transformed into limited company named, SongSerm Sales and Service Co. ,Ltd. Our heat exchanger business were increasingly expanded. Then, in 1998, Songserm Cooling Industry Co.,Ltd. were founded to handle the heat exchanger production business .