A car battery manufacturing factory located in Demak Laut Industrial Park, Kuching. The strategic positioning of translucent roofing sheet lit up the 22,000 sq. meters main factory with natural lighting, without the needs of using artificial lightings during the day. Clerestory roof design with openings at the top, promote natural stack ventilation, removing most of the heat generated by the operating machineries whilst creating a comfortable working environment for the workers.