Water heating is the third largest energy expense in your home. It typically accounts for about 14% or your utility bill.
There are four ways to cut your water heating bills: use less hot water, turn down the thermostat on your water heater to 120 degrees or less, insulate your water heater, and buy a new, more efficient water heater. A family of four, each showering for 5 minutes a day, uses 700 gallons of water a week: this is enough for a 3-year supply of drinking water for one person. You can cut that amount in half simply by using low-flow non aerating shower heads and faucets.