Project Images Glenwood high school Project Summary Hanson provided mechanical, electrical, plumbing (MEP) and structural engineering services for a multiphase project that included additions and heating, ventilating and air conditioning (HVAC) renovations at multiple schools throughout Ball-Chatham School District, including Glenwood High School. The MEP systems were designed to minimize life-cycle costs. Four of the schools received geothermal variable refrigerant flow (VRF) HVAC systems, which combine two of the most efficient HVAC technologies available into a low maintenance, ultra-efficient system that costs less to build than many conventional systems. Construction on the 25,700-square-foot Glenwood High School addition was completed in 2016. The project included a new classroom wing and is conditioned by a geothermal VRF system. All geothermal VRF systems in the district are integrated into a digital data control system for remote access, monitoring and alarms. Hanson also identified and assisted the district in applying for multiple grants and utility rebates that paid for the entire cost premium over air source VRF systems.