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47 according to settings for cost savings, occupant comfort and energy efficiency. Argonne National Laboratory in the U.S. has independently tested OptiCOOL and found that the system reduces HVAC energy consumption by up to 45%. The Australian building industry has taken a number of steps to promote green causes and has made massive strides in implementing sustainable building practices. These initiatives have resulted in huge savings in operational costs in addition to achieving the goal of meeting energy, water and material efficiency targets. A great deal of progress has also been made in waste reduction and management. All these factors have strengthened the Australian building industry and prepared it to meet the challenges of the future which will see greater stress being laid on green practices and the need to preserve the environment.