Data Storage Institute (DSI) Project involves design, supply and installation of Airconditioning and Mechanical Ventilation System for new building within the NUS campus. The ACMV System consists of 6 sets of chiller, total capacity of 1430TR. This project also involves design and build of Class 10, Class 100, Class 1000, Class 10000 cleanroom system, together with the building automation system for the testing laboratory.