Older electric storage-type water heaters can lose a lot of heat through their walls. Wrapping it in an insulating jacket can save energy wasted through excess heat loss, and make your water heater more efficient (insulating natural gas or oil-burner water heaters should be left to professional installers.) Insulating the hot water pipes in your home can save energy wasted through heat loss, and keep your hot water from cooling off before it reaches the tap. Insulating blankets or jackets are available at home improvement stores. Follow the manufacturer’s instructions or enlist the help of a professional.
