The Coldtub is our first ever residential model, bringing the highest level of commercial quality to your backyard, home gym, or wherever you dream of. The most spacious individual model on the market! The only difference between this model and our other models is this will have a Peak Ozone sanitation system instead of our Automated Dead Sea Salt sanitation system(Coldtub Pal). Simply put it in place, fill it up with water, plug it in and set the temperature. All of our tubs plug into a Standard 110v wall outlet, fit through a Standard doorway, are filled up with a garden hose, and have temperature ranges from 42º – 104ºF. Your COLDTUB™ is now ready for your own personal use.