For lots of people, there's nothing like a hot shower to start the day. Although that may just be a great 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 too hot 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 allow growth of potentially harmful bacteria and not supply adequate hot water for your household.

So, what number is ideal for your water heater? In this article, we’ll determine 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 Is the Most Efficient Temperature for a Water Heater?

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

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 especially a 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 consistently heating a tank full of extremely hot water.

What Temperature Should I Set My Hot Water To?

In many instances, the suggested efficient temperature of 120 degrees is an effective yet cost-saving setting for your water heater. At 120 degrees, the water is warm enough to meet the requirements of most homes, but not so hot there's a danger of burning skin on contact. This makes it a safer alternative, especially in homes with small children or elderly people. Lower temperatures also minimize mineral deposits in your water heater, which could cause it to break down or need replacing.

Can I Raise My Water Temperature Higher Than 120 Degrees?

While many plumbing and heating experts say 120 degrees is the preferred water heater temperature if you’re wanting to save money, is it alright to set it higher? Beyond 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: 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 an issue with bacteria, or if any people who live in your home have a compromised immune system.
  • High usage: If your home tends to use a lot of hot water at the same time—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 everyone.
  • Old dishwasher: If your dishwasher is an older model and doesn’t heat water itself, it may be necessary to set your water heater to a higher temperature for it to work correctly.

What Temperature Is Too High?

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 above 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 just seconds for the water to create third-degree burns. This is why a water heater temperature of 150 degrees is especially dangerous in residences with children or the elderly.

Call AZ Air Conditioning and Heating for Your Water Heater Service Needs in Los Angeles

Water heaters can sometimes feel a little mysterious, but the skilled pros at AZ Air Conditioning and Heating know these appliances inside and out. They’ve fixed many brands and types of water heaters through the years, so they have the experience to handle your water heater repair in Los Angeles.

We also provide water heater replacement, so call us at (877) 559-6081 if you suspect you need water heater installation in Los Angeles. We are happy to check out your system and give a free estimate!