For many people, there's nothing like a hot shower in the morning. While that may just 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 scorching can waste power and cost you money. It also can pose 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 provide enough hot water for your dwelling.

So, what temperature should you set your water heater? Below, we’ll determine 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 Water Heater Temperature Is the Most Efficient?

Although many manufacturers advise setting the water temperature at 140 degrees, a more efficient temperature for a water heater is 120 degrees Fahrenheit. Experts say 120 degrees hits the right balance between safety and energy usage.

The U.S. Department of Energy states that setting a home water heater temperature at 120 degrees could save up to 22 percent on energy bills. Energy waste is a particular challenge for water heaters because traditional tank models constantly heat a tank of water in case it is required. If you have the water heater temperature set too high, your water heater is forever heating a tank full of extremely hot water.

What's the Right Temperature for My Hot Water?

In most cases, 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 requirements of most homes, but not so hot that it could cause burning skin on contact. This makes it a safer alternative, especially in homes with young children or elderly people. Reduced temperatures also decrease 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 some situations where it could be a good idea to set your water temperature a little higher, between 130-140 degrees:

  • Bacteria: Higher water temperatures can be helpful in eliminating harmful bacteria that can cause or exacerbate certain health conditions. This also may be recommended if you know your home has a problem with bacteria, or if any members of the household are immunocompromised.
  • 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 to go around.
  • Old dishwasher: If your dishwasher is old and doesn’t heat water on its own, you may have to set your water heater to a higher temperature for it to work correctly.

How Hot Is Too Hot for a Water Heater?

Even though 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. Energy officials say any temperature hotter than 140 degrees is too hot for a water heater in a home. At 150 degrees, which is regarded as 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 unsafe in homes with children or the elderly.

Call Ambience HVAC, Inc. for Your Water Heater Service Needs in Wilmington

Water heaters can be a little mysterious, but the qualified technicians at Ambience HVAC, Inc. know these appliances like the back of their hands. They’ve repaired many brands and styles of water heaters through the years, so they have the experience to handle your water heater repair in Wilmington.

We also offer water heater replacement, so call us at 302-239-HVAC (4822) if you believe you need water heater installation in Wilmington. We are happy to check out your system and produce a free estimate!