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.
Determine the Mounting Space. Tankless water heaters are much smaller than units with a storage tank, allowing them to be wall-mounted. Electric units have measurements in the 10-inch high to 7-inch wide range while gas-fired units have measurements in the 30-inch high by 20-inch wide range.