MY electric bill dropped thirty dollars last month when I changed the heating elements and put a cover on my hot water heater. The lower element was burnt out so the upper had to work overtime, plus the loss of heat because of no cover. Live and learn.
Date your installation! A hot water heater sits quietly in a closet, basement or garage. Forgotten until it breaks. Well, when our hot water heater needed to be replaced, I was left with water on my basement floor and in a panic to get a replacement. This could have been prevented if I knew when it was installed.