Super heated exhaust is a byproduct of engine testing in the Engine Research Building (ERB) at NASA’s Glenn Research Center. Generally, the tests involve burning fuel or using heated air in engine test cells. The exhaust from the tests can approach 1,000 degrees Fahrenheit. To protect the building systems and for the safety of the occupants, water is sprayed into the hot exhaust to cool the air quickly. The water is then sent to cooling towers to recirculate for the duration of the tests.