Warpy probably has smelly hot water. I just had to replace my water heater earlier this year, and found that state code requires a mixer valve... the plumber splained it thusly... your water heater is cranked to the max at 140 degrees, which kills any bacteria that likes to live in water heaters, then the mixing valve automatically adds cold water to the outgoing hot water, lowering the temperature to 120, so you can't get scalded. I actually adjusted it up a little closer to 130 because 120 didn't feel hot enough for me. The bottom line is, after installing a slightly larger water heater with a mixing valve, I actually have hot water running at the tap twice as long as with the old water heater. No more lukewarm endings to showers, or waiting for more water to heat up to fill the bathtub. I've been using the same amount of electricity since the install as I did the previous year.