For lots of people, nothing feels quite as good as a hot shower in the morning. While that may just be a perfect 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 above the recommended degree can waste power and cost you money. It also can pose a safety concern for members of your household. But, if you set your water heater temperature too low, it can enable growth of potentially harmful bacteria and not provide enough hot water for your property.

So, what temp should you set your water heater? In this article, we’ll establish the most efficient temperature to use, when there could be cause to set it a little higher and how hot is too hot for your home's water heater.

What Is the Most Efficient Temperature for a Water Heater?

Although many manufacturers encourage setting the water temperature at 140 degrees, a better temperature for a water heater is 120 degrees Fahrenheit. Specialists 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 up to 22 percent on energy bills. Energy waste is a frequent challenge for water heaters because traditional tank models always heat a tank of water in case it is needed. If you have the water heater temperature set too high, your water heater is constantly heating a tank brimming with very hot water.

So What Temperature Should My Hot Water Be?

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 warm enough to meet the requirements of most residents, but not so hot that it risks burning skin on contact. This makes it a safer choice, especially in homes with younger children or elderly individuals. Cooler temperatures also minimize mineral deposits in your water heater, which could cause it to break down or need replacement.

Can I Set My Water Temperature Hotter Than 120 Degrees?

While many energy experts say 120 degrees is the best water heater temperature if you’re wanting to save money, is it OK to set it higher? Beyond personal preference, there are some circumstances where it could be wise 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 exacerbate certain health conditions. This also may be useful if you know your home has an issue with bacteria, or if any people who live in your home have a compromised immune system.
  • High usage: If your home has a tendency to use a large volume of hot water all at once—showering while also running the dishwasher and washing machine, for example—a higher water heater temperature may be necessary to make sure there’s adequate hot water for everyone.
  • Old dishwasher: If your dishwasher is old and doesn’t heat water itself, it may be necessary 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 extremely hot or would rather blend hot and cold water to create their ideal water temperature, there is such a thing as water that is too hot. Plumbing and heating specialists say any temperature above 140 degrees is too hot for a water heater in a residence. At 150 degrees, which is regarded as way too hot, it takes a few seconds for the water to create third-degree burns. This is why a water heater temperature of 150 degrees is particularly dangerous in residences with children or the elderly.

Call Desert Husky HVAC/R Services for Your Water Heater Service Needs in Tucson and Phoenix

Water heaters can seem a little mysterious, but the knowledgeable specialists at Desert Husky HVAC/R Services know these appliances like the back of their hands. They’ve repaired many brands and models of water heaters through the years, so they have the experience to take care of your water heater repair in Tucson and Phoenix.

We also are skilled in water heater replacement, so contact us at 520-416-5415 if you suspect you need water heater installation in Tucson and Phoenix. We are happy to take a look at your system and produce a complimentary estimate!