Hollis Primary School (HPS) had served its Hollis, New Hampshire community for generations when students, staff and the school district pushed for a major renovation. Housed within a brick masonry building constructed in 1952, HPS needed a retrofit to improve indoor comfort and the educational environment in a sustainable, energy-efficient way. Mitsubishi Electric’s Zoned Comfort Solutions® with Hyper-Heating INVERTER® (H2i®) technology proved essential in delivering comfortable classrooms and utility savings. Coupled with spray-foam insulation and a solar array, the system helped the school drastically reduce their carbon footprint and overall energy consumption.