The ACME DXP 60 Composite fan for tunnel or cross-ventilated barns is a high quality fan that is both?efficient and durable. It has one of the highest energy efficiency ratings among all 60 fans on the market. In 2015 this was the only fan to qualify for the Save on Energy grant in Wisconsin. Another feature that sets ACME apart is the durability of their fan components. They are built in the USA and ACME uses a Mazak Fiber optic laser to fabricate each of the aerodynamic and structural components.