The Howard County Public School System has awarded a contract to Excel Mechanical Contractors, LLC for the Centennial High School DDC Conversion and Other Controls Modification Work - Bid Package 1. The contract involves converting the existing hybrid direct digital control (DDC) / pneumatic control system for the HVAC systems at Centennial High School to full DDC, as well as testing, adjusting, and balancing of the HVAC systems. The work is expected to result in improved operation of the HVAC systems and provide enhanced troubleshooting capabilities. The contract value is approximately $1,379,000.