Four Winds Alternative and CTE High School is the first net zero school on tribal land in the country. A net zero school is an energy efficient building that produces as much energy as it consumes every year. There are several features that contribute to attaining net zero status including: photovoltaic (solar) panels, a ground-source geothermal heating and cooling system, high-efficiency water-to-air heat pumps, energy recovery system for free heating and cooling, variable-speed fans and pumps to minimize excess energy use, occupancy sensors for demand-based lighting, LED lighting, solar tubes for free lighting, specially insulated walls and roof, and triple pane windows.