Rico in Spanish means rich in English just if your talking about money. If your talking about food rico means it's delicious, good, etc. Example, esto huele rico mean this smell good or  que Rica la comida means like delicious food in English. Puerto Rico means Rich Port in Spanish.
Tankless or demand-type water heaters heat water directly without the use of a storage tank. Heat pump water heaters move heat from one place to another instead of generating heat directly for providing hot water. Solar water heaters use the sun's heat to provide hot water.
Answer to 1: The amount of gas consumed to set the temperature of your tankless water heater higher is negligible. Unlike a tank water heater, your tankless heater does not consume gas when water is not in demand.ince the draw of hot water is reduced, the amount of gas to heat the smaller flow is also reduced. For washing dishes or laundry, the higher temperature will cost you more money as the temperature may not be offset with cold water.