For lots of people, there’s nothing better than a hot shower to get the morning started. Even though that might be a fantastic way to wake up and start the day, experts say it’s possible to set your water too hot.

Setting your water heater to a temperature that’s too hot can throw away energy and cost you money. It also can cause a safety challenge for members of your family. But, if you set your water heater temperature too low, it can allow growth of potentially harmful bacteria and not provide adequate hot water for your household.

So, what number is the right one for your water heater? Below, we’ll identify 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 Is the Most Efficient Temperature for a Water Heater?

Although many brands encourage setting the water temperature at 140 degrees, a more economical temperature for a water heater is 120 degrees Fahrenheit. Experts say 120 degrees strikes the right balance between safety and energy use.

The U.S. Department of Energy reports that setting a home water heater temperature at 120 degrees could save approximately 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 needed. If you have the water heater temperature set too high, your water heater is forever heating a tank brimming with super-hot water.

What Temperature Should I Set My Hot Water To?

In many instances, the suggested efficient temperature of 120 degrees is the right setting for your water heater. At 120 degrees, the water is warm enough to meet the desires of most residents, but not so hot that it risks burning skin on contact. This makes it a safer option, especially in homes with younger children or elderly individuals. Reduced temperatures also minimize mineral deposits in your water heater, which could cause it to break down or need replacing.

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 alright to set it higher? Apart from personal preference, there are a couple of different situations where it could make sense to set your water temperature a little higher, between 130-140 degrees:

  • Bacteria: Hotter water temperatures can be beneficial in eliminating harmful bacteria that can cause or worsen certain health conditions. This also may be practical if you know your home has an issue with bacteria, or if any people who live in your home are immunocompromised.
  • High usage: If your home tends to use a large volume of hot water simultaneously—showering while also running the dishwasher and washing machine, for example—a greater water heater temperature may be necessary to make sure there’s sufficient hot water for all the household's needs.
  • Old dishwasher: If your dishwasher is an older model and doesn’t heat water as part of its process, you may have to set your water heater to a higher temperature for it to work properly.

How Hot Is Too Hot for a Water Heater?

While some people like their water very hot or would rather blend hot and cold water to achieve their desired water temperature, there is such a thing as water that is too hot. Energy officials say any temperature higher than 140 degrees is too hot for a water heater in a home. At 150 degrees, which is definitely 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 particularly hazardous in homes with children or the elderly.

Call B & B Heating & Cooling for Your Water Heater Service Needs in Florissant and St. Charles

Water heaters can be a little mysterious, but the qualified specialists at B & B Heating & Cooling know these appliances extremely well. They’ve repaired many brands and designs of water heaters over the years, so they have the experience to handle your water heater repair in Florissant and St. Charles.

We also provide water heater replacement, so contact us at 314-325-7552 if you think you need water heater installation in Florissant and St. Charles. We are happy to examine your system and provide a complimentary estimate!