The Technical research paper titled INVESTIGATION OF UNSTEADY HEAT TRANSFER CHARACTERISTICS OF BUILDING WALLS FOR GREEN ENERGY BUILDING CONSTRUCTION Saboor S1*, Ashok Babu T. P.2 1Research Scholar, Mechanical Engineering department, National Institute of Technology Karnataka, Surathkal, India E-mail: Saboor.nitk@gmail.com 2 Professor, Mechanical Engineering department, National Institute of Technology Karnataka, Surathkal, India E-mail: tpashok@rediffmail.com Had been awarded the best paper award in International Conference on New Frontiers in Chemical, Energy and Environmental Engineering (INCEEE-2015), 20-21 March, 2015. Conducted by National Institute of Technology, Warangal - 506 004, Telangana, India