The ZR Series of water-cooled, oil-free air compressors, manufactured by Atlas Copco, Stockholm, Sweden, are the first to be TüV certified for zero net energy consumption. In specific conditions, 100 percent of the electrical power used to run a ZR 55-750 can be recovered in the form of heated water. Industries that require large amounts of hot water and steam could dramatically reduce energy costs by using the energy-neutral compressor systems. Industries that would benefit from the net zero compressors include food and beverage, dairy, pulp and paper, pharmaceuticals, chemicals, power plants, clean rooms and textiles.