Before the recent economic downturn, commercial casinos collected at least $30 billion in revenues each year from 2005 through 2008.1 During this period, US casino owners built new facilities and expanded the size of their existing facilities. As a result of the economic downturn, new US commercial casino construction has come to a screeching halt and casino operators are now focused on existing facility cost reduction. The Section 179(D) Tax Provisions Increasingly, casino operators are taking advantage of the EPAct IRC section 179(D) commercial building energy efficiency tax provisions, which have been extended through 2013. EPAct tax deductions are available for qualifying energy reductions in lighting, HVAC(heating, ventilation, and air conditioning), and building envelope. (Building envelope consists of the building's foundation, walls, roof, windows, and doors, all of which control the flow of energy between the interior and exterior of the building.) The Nature of Casi