One of the biggest energy guzzlers in many homes is the water heater. With an average family of four, daily showers and household chores can deplete the contents of a fifty gallon water heater in no time, resulting in high utility bills. If you’re looking for a greener, more energy efficient water heater, here’s a green alternative that may work for your household. AirGenerate’s AirTap™ water heater uses mostly air and a small amount of electricity to heat the water. The unit attaches atop any standard electric or gas water heater and acts as a heat pump to pull the heat from the surrounding air, compress it, and send it into your water heater to heat the water inside. According to AirGenerate, their AirTap™ heat pump water heater uses 2.5 times less energy than standard water heaters. Along with energy efficient water heaters and other household appliances, don’t forget one of the simplest steps in conserving energy and water—taking shorter showers!