Any steam shower enclosure is required to be steam ready, which means your shower enclosure should be sealed and adapted correctly for steam use. Any qualified plumber or contractor should know the basic steps ensuring a steam ready enclosure.
Not mandatory. However, it is highly recommended to use a water softener in your home to generally prolong, and protect your water fittings and appliances. Soft water is also known to have general benefits for your skin, hair etc.
Set your water heater to at least 135-140 for best results. Serene Steam use is IAPMO Certified & meets IGC-154-2019 standard.
Standard household water pressure should be between 50 and 55 PSI for best results. Please check your water regulator is up to code, 50 PSI.