>Mist showers would need to use distilled water to prevent lung damage from breathing in hard water minerals. Unless you have a source for this, it sounds like

>Mist showers would need to use distilled water to prevent lung damage from breathing in hard water minerals. Unless you have a source for this, it sounds like some strong "programmer medicine". The lungs have cilia, mucus, and leukocytes that can remove impressive amounts of contaminants (like coal dust or tar from smoking) before it starts becoming a problem, so it's hard to believe hard water mist for less than an hour per day poses any risk. Your showerhead/water being contaminated with Legionella would though.