The Thermo King Corp. TriPac Evolution APU delivers performance, lowers overall truck fuel consumption and reduces emissions while providing driver comfort and ease of use, according to the company. It meets EPA Tier IV emission requirements while leveraging patented technology to drive unit performance, efficiency and user productivity. The TriPac Evolution features software that can be customized to enhance the customer’s operating profile. The APU also offers an extended maintenance interval of 2,000 hours, an updated flash-loadable control system and improved service access for easier maintenance.