For many people, there’s nothing better than a hot shower in the morning. Although that may 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 above the recommended degree can throw away electricity and cost you money. It also can cause a safety issue for members of your residence. But, if you set your water heater temperature too low, it can enable growth of potentially harmful bacteria and not provide enough hot water for your property.

So, what temperature should you set your water heater? Below, we’ll determine the most effective temperature to use, when there could be reason to set it a little higher and how hot is too hot for your home's water heater.

What Is the Most Efficient Temperature for a Water Heater?

Although many manufacturers advise 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 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 a frequent 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 constantly heating a tank filled to the brim with extremely hot water.

So What Temperature Should My Hot Water Be?

More often than not, the suggested efficient temperature of 120 degrees is a good setting for your water heater. At 120 degrees, the water is hot 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 option, especially in homes with young children or elderly people. Cooler 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 energy experts say 120 degrees is the best water heater temperature if you’re trying to save money, is it alright to set it higher? Beyond personal preference, there are some situations where it could make sense to set your water temperature a little higher, between 130-140 degrees:

  • Bacteria: Increased water temperatures can be helpful in eliminating harmful bacteria that can cause or exacerbate certain health conditions. This also may be useful if you know your home has a problem with bacteria, or if any members of the household are immunocompromised.
  • High usage: If your home tends to use a significant amount of hot water at the same time—showering while also running the dishwasher and washing machine, for example—a hotter 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, it may be necessary to set your water heater to a higher temperature for it to work effectively.

What Temperature Is Too High?

While some people like their water extremely hot or prefer to blend hot and cold water to achieve their ideal water temperature, there is such a thing as water that is too hot. Plumbing and heating specialists say any temperature above 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 lead to third-degree burns. This is why a water heater temperature of 150 degrees is particularly hazardous in residences with children or the elderly.

Call Fletcher Plumbing, Heating & AC for Your Water Heater Service Needs in Smyrna

Water heaters can sometimes feel a little mysterious, but the skilled technicians at Fletcher Plumbing, Heating & AC know these appliances inside and out. 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 Smyrna.

We also are skilled in water heater replacement, so call us at 302-653-0503 if you think you need water heater installation in Smyrna. We are happy to check out your system and produce a no-cost estimate!