Most people are surprised to learn that the second largest energy consumer in the home, after space conditioning, is water heating. Water heating uses more than 15% of the average home's total energy use. Because it is an out-of-sight energy consuming system, most forget about this major contributor to the home's energy bill. For quick savings, this is a great place to start because some minor changes that are fairly easy to make can make a noticeable difference in your energy bills.
On demand electric water heaters are installed under a kitchen or bathroom sink to provide instant hot water only when needed. Because plumbing runs are short and hot water isn't heated unless it's being used, these units reduce water-heating costs. On demand water heaters also reduce plumbing costs in new construction because only cold water lines must be run to the kitchen and bathrooms.
Did you know that a hot water faucet leaking one drip per second wastes 200 gallons a year? Repairing leaky faucets will lower energy bills substantially.