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.
Turn off the electricity to your water heater by opening the breaker at the breaker box or removing the fuse if you have one. Locate the covers for your thermostats. Some electric heaters have two, a top and bottom element. If you notice two access panels on your tank you probably have two thermostats.