The innovative structure of the internal components allows the two boilers to be controlled independently and flexibly. This way you can always have the amount of water needed for a hot shower in half the time. The exclusive TitanShield technology ensures a long life of the water heater and keeps its performance always at the top. Corrosion protection thanks to the natural properties of titanium and the action of the large magnesium anode. IF YOU HAVE ANY PROBLEMS PLEASE CONTACT US IMMEDIATELY BEFORE LEAVING NEGATIVE FEEDBACK!! YOU WILL FIND US READY TO RESOLVE ANYTHING SOMETIMES A SIMPLE MISUNDERSTANDING, OR THE INEFFICIENCY OF BANKS, POST OFFICES, COURIERS AND OTHERS CAN COMPROMISE FOREVER THE RELIABILITY AND SERIOUSNESS OF A SELLER ON EBAY. EVERYTHING CAN BE RESOLVED WITH THE UTMOST SER.