Changdeok E&C, which has been gaining unshakable reputation through phenomenal growth in the residential business with principle of proper and conscientious management and up to date on-site technology, is currently preparing for further advancement in the industry in the 21st Century through entry into environmental energy market. With firm belief that exploitation and challenges, sprit of creation, assertive thinking and innovation in management is essential in becoming one of the key players of the new era, Changdeok E&C has been focusing on development of new technology, appropriate for the 21st Century, and research in the area of raw material, and successfully managed to develop and commercialized MAESTA, electrical power saving apparatus with comparatively higher efficiency and effectiveness. Human kind at the moment, after having, in earnest, utilized carbon based energy resources for more than 30 years, is facing depletion of invaluable energy sources. Unlike the western countries with advanced energy technology and petroleum producing countries in the Middle East, we rely completely on import of petroleum. Yet we do not even have sufficiently useful alternative energy resources. In addition, we can not ignore that the domestic enterprises are facing imminent management reality of having to improve productivity and reduce cost of manufacturing in order to improve international competitiveness. We are extremely confident that the electrical power saving apparatus, MAESTA, of Changdeok E&C can reduce electricity consumption with exceptional rate of electrical power saving, thereby providing significant substitution effect to cost reduction policies of enterprises.