The MrSteam CU Series steam boilers operate under pressure and are designed for the most demanding commercial steam room environments. Capable of steaming rooms (one to four) up to a total of 4500 cubic feet, the CU Series boilers utilize electronic room temperature controllers to minimize room temperature fluctuation and provide for consistent steambathing pleasure. Available with a 24-hour, 7-day programmable time clock and Auto Flush self-draining system, the CU Series steam boiler can turn on, turn off and drain automatically at day's end. Available in 208V, 240V, 480V and 600V operating voltages.