Was SUPPOSED to come with supplementary heater. That does not work, necessitating a new, larger hot water heater (which we will put on a timer to conserve electricity). This tub is really wonderful for two people, sunk in the floor to a height where one can sit and pull one's legs in and out if you are older like us. My husband uses chairs now, because of his back, and I recline because of fibromyalgia, so this is our once/twice per week spa/"meeting" place. We love it, but feel we were sold something it is not. Bittersweet, and EXPENSIVE (for us) misrepresentation.