NABERS is a performance-based rating system for existing buildings. NABERS rates a building on the basis of its measured operational impacts on the environment, and provides a simple indication of how well you are managing these environmental impacts compared with your peers and neighbours. NABERS now incorporates the Australian Building Greenhouse Rating (ABGR), which has been re-named NABERS Energy for offices. The following document provides information on the rebranding of ABGR.