The Mr. Steam MS400R Steam Shower Generator is a premium 9kW residential steam generator designed to deliver powerful, consistent steam for residential steam rooms up to 257 adjusted cubic feet. Featuring Mr. Steam’s exclusive microprocessor operating system and AutoSteam® technology, the MS400R maintains a steady flow of steam while providing precise system monitoring for a luxurious and reliable steam bathing experience. Built with a corrosion-resistant stainless steel cabinet and industrial-grade, serviceable heating elements, the MS400R is engineered for years of dependable performance. Its compact design allows for flexible installation in closets, vanities, or nearby utility spaces, while modular plug-and-play connections simplify installation and future maintenance. Compatible with the full range of Mr. Steam controls and accessories—including AutoFlush®, SteamLinx®, ChromaSteam®, AromaSteam®, AudioX®, and Linear SteamHeads—the MS400R can be customized to create a personalized home spa experience.