For many people, there’s nothing better than a hot shower to start the day. Even though that might be a perfect way to wake up and start the day, experts say you can set your water too hot.

Setting your water heater to a temperature that’s too hot can squander energy and cost you money. It also can create a safety concern for members of your home. But, if you set your water heater temperature too low, it can allow growth of potentially harmful bacteria and not supply sufficient hot water for your household.

So, what number is ideal for your water heater? In this article, we’ll determine the most cost-effective temperature to use, when there could be justification to set it a little higher and how hot is too hot for your own water heater.

What Temperature for my Water Heater Is the Most Energy Efficient?

Although many manufacturers suggest setting the water temperature at 140 degrees, a more economical temperature for a water heater is 120 degrees Fahrenheit. Industry experts say 120 degrees strikes the right balance between safety and energy usage.

The U.S. Department of Energy estimates that setting a home water heater temperature at 120 degrees could save up to 22 percent on a home's utility bills. Energy waste is a particular challenge for water heaters because traditional tank models continuously heat a tank of water in case it is required. If you have the water heater temperature set too high, your water heater is constantly heating a tank filled to the brim with super-hot water.

What Temperature Should I Set My Hot Water To?

More often than not, the suggested efficient temperature of 120 degrees is the right setting for your water heater. At 120 degrees, the water is hot enough to meet the needs of most members of the household, but not so hot that it could cause burning skin on contact. This makes it a safer option, especially in homes with younger children or elderly men and women. Lower temperatures also cut down on mineral deposits in your water heater, which could cause it to break down or need replacement.

Should You Ever Set Your Water Temperature Higher Than 120 Degrees?

While many plumbing and heating experts say 120 degrees is the best water heater temperature if you’re looking to save money, is it acceptable to set it higher? Apart from personal preference, there are a couple of different scenarios where it could be a good idea to set your water temperature a little higher, between 130-140 degrees:

  • Bacteria: Increased water temperatures can be beneficial in eliminating harmful bacteria that can cause or exacerbate certain health conditions. This also may be practical if you know your home has a problem with bacteria, or if any residents of the house are immunocompromised.
  • High usage: If your home is inclined to use a large volume of hot water all at once—showering while also running the dishwasher and washing machine, for example—a greater water heater temperature may be necessary to make sure there’s adequate hot water to go around.
  • Old dishwasher: If your dishwasher is getting up there in years and doesn’t heat water as part of its process, you may need to set your water heater to a higher temperature for it to work properly.

What Temperature Is Too Hot for my Hot Water Heater?

While some people like their water quite hot or like to blend hot and cold water to obtain their desired water temperature, there is such a thing as water that is too hot. Experts say any temperature higher than 140 degrees is too hot for a water heater in a home. At 150 degrees, which is considered way too hot, it takes a few seconds for the water to lead to third-degree burns. This is why a water heater temperature of 150 degrees is especially unsafe in homes with children or the elderly.

Call Arizona Comfort Systems for Your Water Heater Service Needs in Sierra Vista

Water heaters can seem a little mysterious, but the skilled specialists at Arizona Comfort Systems know these appliances like the back of their hands. They’ve fixed many brands and styles of water heaters throughout the years, so they have the experience to handle your water heater repair in Sierra Vista.

We also provide water heater replacement, so give us a call at 520-415-5681 if you suspect you need water heater installation in Sierra Vista. We are happy to check out your system and give a no-cost estimate!