For quite a few people, there's nothing like a hot shower in the morning. Although that might be a fantastic 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 too hot can waste energy and cost you money. It also can pose a safety issue for members of your family. But, if you set your water heater temperature too low, it can permit growth of potentially harmful bacteria and not provide adequate hot water for your household.

So, what number is ideal for your water heater? In this article, we’ll establish the most cost-effective 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 brands advise setting the water temperature at 140 degrees, a more efficient temperature for a water heater is 120 degrees Fahrenheit. Specialists say 120 degrees hits the right balance between safety and energy consumption.

The U.S. Department of Energy states that setting a home water heater temperature at 120 degrees could save approximately 22 percent on a home's utility bills. Energy waste is especially a challenge for water heaters because traditional tank models constantly heat a tank of water in case it is demanded. If you have the water heater temperature set too high, your water heater is forever heating a tank full of super-hot water.

So What Temperature Should My Hot Water Be?

More often than not, the suggested efficient temperature of 120 degrees is an effective yet cost-saving setting for your water heater. At 120 degrees, the water is heated enough to meet the needs of most homes, but not so hot that it could cause burning skin on contact. This makes it a safer choice, especially in homes with young children or elderly people. Lower temperatures also decrease mineral deposits in your water heater, which could cause it to break down or need replacing.

Can I Set My Water Temperature Hotter Than 120 Degrees?

While many industry 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 scenarios where it could be wise 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 aggravate 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 significant amount 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 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 properly.

How Hot Is Too Hot for a Water Heater?

Even though some people like their water very hot or prefer to blend hot and cold water to create their perfect 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 definitely 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 considered very hazardous in homes with children or the elderly.

Call Contra Costa Heating & AC for Your Water Heater Service Needs in The Bay Area

Water heaters can be a little mysterious, but the skilled specialists at Contra Costa Heating & AC know these appliances like the back of their hands. They’ve repaired many brands and styles of water heaters throughout the years, so they have the experience to take care of your water heater repair in The Bay Area.

We also provide water heater replacement, so reach out to us at 510-343-9841 if you believe you need water heater installation in The Bay Area. We are happy to examine your system and provide a complimentary estimate!