The Mr. Steam MS-R (Model MS90R2401) is a compact, efficient steam generator designed for small residential steam rooms. Its stainless-steel construction and microprocessor-based control system provide quiet, reliable, and consistent steam output. With low water consumption and optional Express Steam for rapid heat-up, the MS-R delivers a spa-quality experience in a compact package. 5 kW capacity (MS90R variant), suitable for small steam rooms (~0-71 cu. ft. Construction Material:Stainless steel Water Usage:Less than 2 gallons per 20-minute session