said by Jack_in_VA:
How about our young, elderly and disabled? Why heat the water to 140 degrees when it's not needed and costs fortune to do? I do just fine at 120 degrees.
I have seen the "costs a fortune" argument a couple times. My summer bill averages $20, but the cost of the gas averages only $10. (the difference is the tax, and the charge for the meter that will be there regardless of how much gas I use) I keep my water heater at 140-145 degrees, and I just cant see that I will save "a fortune" by turning the heater down a dozen degrees.
I have a 40 gallon natural gas heater, and we are not shy about showers, dish washer use, and laundry. There are two adults and two large doggies so we do plenty of laundry.
I like hot showers, I like to be able to get the dishes clean in the dishwasher, and I like to get my dirty work clothes clean, so I am not turning down my water temperature any time soon.