The Mr. Steam MS400R2401 is a powerful 9 kW residential steam generator engineered to deliver spa‑quality steam for rooms up to 257 cubic feet, making it ideal for larger luxury showers . It features a precision microprocessor control system, industrial‑grade copper heating element, and fully stainless steel construction for whisper‑quiet, energy‑efficient operation using less than 2 gallons of water per 20‑minute session . With intuitive LED diagnostics, modular plug‑and‑play connections, and a 60‑minute safety shut‑off, it’s built for easy installation and long‑term reliability . UL, CE, and NOM certified and backed by a limited lifetime warranty, the MS400R2401 delivers consistent luxury and quiet performance for your at‑home wellness sanctuary .