For lots of people, there's nothing like a hot shower in the morning. While that may be a perfect way to wake up and start the day, experts say you should be careful not to set your water too hot.

Setting your water heater to a temperature that’s scorching can throw away energy and cost you money. It also can pose a safety challenge 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 produce sufficient hot water for your household.

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

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

Although many companies suggest setting the water temperature at 140 degrees, a more economical temperature for a water heater is 120 degrees Fahrenheit. Specialists say 120 degrees provides the right balance between safety and energy consumption.

The U.S. Department of Energy reports that setting a home water heater temperature at 120 degrees could save approximately 22 percent on energy costs. Energy waste is a frequent 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 filled to the brim with super-hot water.

So What Temperature Should My Hot Water Be?

In most cases, the suggested efficient temperature of 120 degrees is an effective yet cost-saving setting for your water heater. At 120 degrees, the water is hot enough to meet the desires of most residents, but not so hot there's a danger of burning skin on contact. This makes it a safer alternative, especially in homes with young children or elderly individuals. Cooler temperatures also cut down on mineral deposits in your water heater, which could cause it to break down or need replacement.

Can I Raise My Water Temperature Hotter Than 120 Degrees?

While many energy experts say 120 degrees is the best water heater temperature if you’re looking to save money, is it alright to set it higher? In addition to personal preference, there are some circumstances 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 a good way to eliminate harmful bacteria that can cause or exacerbate certain health conditions. This also may be helpful if you know your home has a problem with bacteria, or if any members of the household are sick.
  • High usage: If your home has a tendency to use a significant amount 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 enough hot water for all the household's needs.
  • Old dishwasher: If your dishwasher is an older model and doesn’t heat water itself, you may have to set your water heater to a higher temperature for it to work correctly.

What Temperature Is Too Hot for my Hot Water Heater?

While some people like their water extremely hot or like to 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 higher than 140 degrees is too hot for a water heater in a residential dwelling. At 150 degrees, which is considered way too hot, it takes only seconds for the water to cause third-degree burns. This is why a water heater temperature of 150 degrees is especially unsafe in residences with children or the elderly.

Call Fire & Ice HVAC for Your Water Heater Service Needs in Manassas

Water heaters can sometimes feel a little mysterious, but the knowledgeable pros at Fire & Ice HVAC know these appliances extremely well. They’ve repaired 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 703-595-4157 if you suspect you need water heater installation in Manassas. We are happy to check out your system and produce a no-cost estimate!