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.
Tankless Water Heaters. 1. Calculate how much hot water you need at any time. Use this chart to calculate the gallons per minute (GPM) of hot water each of your fixtures and appliances needs and add up these amounts to get a total GPM for your household.