The purpose of this research project is to explore various possibilities and options to retrofit the existing mechanical systems, to provide a better indoor environment. The focal points to achieve this target would be by studying the systems, sectors and managing it in the most sustainable ways. Renewable Energy or less carbon intensive energy solutions thereby Reducing the energy consumption. Localized controls for the heating zones into sectors for better efficiency. Energy saving measures for mechanical ventilation systems which Improves indoor air quality. Retro-fit the building while preserving the heritage values. Energy efficient lighting.