Prompt Techno Service Co., Ltd.

The company was founded in 1992 as a joint venture between Teo Hong Silom the Hong Zhang. The contractor installing the mechanical and electrical systems with Elyo South East Asia Pte., An affiliated group of companies Elyo & Suez Lyonnaise Des Eaux France. Which is responsible for the management of public utilities in high-rise buildings in the investment ratio 51:49.

          Teo Hong Silom Co., Ltd was founded in 1974 with a turnover of over 1,000 million baht in 1998 to supply equipment for use in systems engineering and service. Of air conditioning, elevator and control in electric power system.