Nuvis Solar Water Heating and Pool Heating Systems are both completely self-sufficient. They know when to collect heat from the sun, and when not to. Nuvis Water Heaters know when no electricity is needed (which is almost all of the time), and when to provide back-up heat to insure your comfort. Nuvis Pool Heaters come with an Automatic Control Valve, that you set to your perfect temperature; Nuvis and nature do the rest. Nuvis is so smart that you can just kick back, take a deep breath, and simply enjoy the savings they provide. Nuvis withstands the test of time. Made in America for over 30 years, our products have consistently exceeded industry standards, providing some of the highest thermal output ratings ever tested at the Florida Solar Energy Center* (FSEC) With recent improvements in design, product technology and manufacturing, your Nuvis Solar Heating System can be expected to last, trouble-free, longer than ever before. In fact, Nuvis is so efficient and reliable that the savings they provide should pay for itself many times over.