For many people, there's nothing like a hot shower in the morning. Even though 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 above the recommended degree can throw away power and cost you money. It also can cause a safety challenge for members of your household. But, if you set your water heater temperature too low, it can permit growth of potentially harmful bacteria and not produce sufficient hot water for your household.

So, what temperature is the right one for your water heater? Here, we’ll identify 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 Water Heater Temperature Is the Most Efficient?

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 provides the right balance between safety and energy usage.

The U.S. Department of Energy reports that setting a home water heater temperature at 120 degrees could save up to 22 percent on a home's utility bills. Energy waste is a particular challenge for water heaters because traditional tank models always heat a tank of water in case it is needed. If you have the water heater temperature set too high, your water heater is consistently heating a tank filled to the brim with super-hot water.

What Temperature Should I Set My Hot Water To?

More often than not, the suggested efficient temperature of 120 degrees is the right setting for your water heater. At 120 degrees, the water is heated enough to meet the desires of most residents, but not so hot that it risks burning skin on contact. This makes it a safer option, especially in homes with younger children or elderly people. Cooler 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 Hotter Than 120 Degrees?

While many industry experts say 120 degrees is the ideal water heater temperature if you’re looking to save money, is it acceptable to set it higher? Apart from personal preference, there are a couple of different situations where it could be wise to set your water temperature a little higher, between 130-140 degrees:

  • Bacteria: Increased water temperatures can be beneficial in eliminating harmful bacteria that can cause or aggravate certain health conditions. This also may be useful if you know your home has a problem with bacteria, or if any residents of the house are sick.
  • High usage: If your home tends to use a large volume 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 adequate hot water for all the household's needs.
  • 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 properly.

How Hot Is Too Hot for a Water Heater?

Although some people like their water extremely hot or like to blend hot and cold water to achieve 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 residential dwelling. At 150 degrees, which is definitely 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 especially dangerous in residences with children or the elderly.

Call Retro HVAC Service & Installation for Your Water Heater Service Needs in Philadelphia

Water heaters can be a little mysterious, but the skilled technicians at Retro HVAC Service & Installation know these appliances like the back of their hands. They’ve repaired many brands and models of water heaters through the years, so they have the experience to take care of your water heater repair in Philadelphia.

We also provide water heater replacement, so contact us at 267-277-3851 if you suspect you need water heater installation in Philadelphia. We are happy to check out your system and produce a complimentary estimate!