Dunham-Bush, Inc. has nearly a century of experience in air conditioning and refrigeration. For a good portion of that long and proud history, the company has been providing equipment for industrial and process cooling. Revolutionary Dunham-Bush rotary screw and reciprocationg chiller designs have been proven in a variety of settings throughout the world where precise, reliable cooling is an absolute necessity. In a number of installations, Dunham-Bush compressors have been in operation for more than 200,000 hours without ever being opened.