With energy costs rising, energy efficient appliances are becoming more important to homeowners. One of the least energy efficient appliances in the average American household is the hot water heater. It takes a lot of energy to heat water and most water heaters use a storage system which heats water whether or not the hot [...]

There is an immediate need for the conservation of water because the world the supply available of drinking water is apprehensive - in fact, according to the International survey of population, by the year 2025 there will be between 2.7 billion and 3.2 billion people who live in conditions water-rare or water-subjected to a constraint. [...]