For lots of people, there’s nothing better than a hot shower to start the day. While that may just 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 create a safety concern for members of your home. But, if you set your water heater temperature too low, it can permit growth of potentially harmful bacteria and not supply sufficient hot water for your household.

So, what number is ideal for your water heater? Below, we’ll establish the most efficient temperature to use, when there could be reason to set it a little higher and how hot is too hot for your personal water heater.

What Water Heater Temperature Is the Most Efficient?

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

The U.S. Department of Energy estimates that setting a home water heater temperature at 120 degrees could save roughly 22 percent on energy costs. Energy waste is a particular 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 full of super-hot water.

What's the Right Temperature for My Hot Water?

In many instances, the suggested efficient temperature of 120 degrees is a good setting for your water heater. At 120 degrees, the water is heated enough to meet the desires of most members of the household, but not so hot that it could cause burning skin on contact. This makes it a safer choice, especially in homes with small children or elderly people. Lower temperatures also cut down on 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 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? Beyond personal preference, there are a few scenarios where it could be wise to set your water temperature a little higher, between 130-140 degrees:

  • Bacteria: Higher water temperatures can be beneficial in eliminating harmful bacteria that can cause or aggravate 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 have a compromised immune system.
  • 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 hotter water heater temperature may be necessary to make sure there’s enough hot water for all the household's needs.
  • Old dishwasher: If your dishwasher is getting up there in years and doesn’t heat water on its own, it may be necessary to set your water heater to a higher temperature for it to work properly.

What Temperature Is Too High?

Although some people like their water quite hot or would rather blend hot and cold water to obtain their desired water temperature, there is such a thing as water that is too hot. Plumbing and heating specialists say any temperature higher than 140 degrees is too hot for a water heater in a residential dwelling. At 150 degrees, which is regarded as way too hot, it takes only seconds for the water to lead to third-degree burns. This is why a water heater temperature of 150 degrees is considered very unsafe in residences with children or the elderly.

Call Woody's Sudden Service for Your Water Heater Service Needs in Manassas

Water heaters can sometimes feel a little mysterious, but the qualified specialists at Woody's Sudden Service know these appliances like the back of their hands. They’ve serviced many brands and models of water heaters through the years, so they have the experience to handle your water heater repair in Manassas.

We also provide water heater replacement, so reach out to us at 703-278-2036 if you think you need water heater installation in Manassas. We are happy to check out your system and produce a no-cost estimate!