Green Rating for Integrated Habitat Assessment (GRIHA) is a Government of India (GoI) rating system1 for green buildings developed by The Energy and Resources Institute (TERI) in 2004;Later, in 2007, the Ministry of New and Renewable Energy (MNRE) collaborated with TERI to form an independent society called ADARSH to develop and implement GRIHA. The society’s responsibilities are to register projects under GRIHA, and also to advocate and generate awareness on sustainable habitats in the Indian context. All registered institutional, commercial and residential buildings except industrial complexes are rated based on 34 criteria through the process of building designing, construction, operations and maintenance. It is the only rating system that covers ventila systems.