Vatti has a patented temperature-control technology. Normally when we turn off the water heater during the shower, the left water temperature will go very high due to the lasting heat of the heat exchanger. So when you turn on the water heater to continue the shower, the first half minute will bring out very hot water. Then some water will be wasted. But VATTI has temperature control capsule technology, it’ll mix hot water and cold water in a certain capsule, so that you’ll always have warm water for your bath.