WHAT?is an environmental rating system for buildings developed by PAM (Pertubuhan Arkitek Malaysia / Malaysian Institute of Architects) and ACEM (the Association ofConsulting Engineers Malaysia).Its develop specifically for the Malaysian Tropical Weather, environmental and environmental context, cultural and social needs.Malaysia’s first comprehensive rating system for evaluating the environmental design and performance of Malaysian buildings based on Energy Efficiency, Indoor Environment Quality, Sustainable Site Planning & Management Materials & Resources Water Efficiency Innovation.