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What is the Best Temperature Setting for Your Hot Water Heater?

Brookline, NH Homeowner Seeks Recommendations

The best temperature setting for a hot water heater is between 120 and 140 degrees. Below 120 degrees, bacteria can develop in the stagnant water sitting in the tank. Above 140 degrees, the water is so hot that you and family members can be at risk for scalding in as little as two seconds.

A Brookline resident had just replaced his hot water heater. Unsure of the proper temperatures, he asked the Joyce Cooling & Heating technician that installed the heater.

Keeping the Water Hot Enough to Kill Germs and Bacteria

Since the water in your hot water heater is often standing for extended periods of time, it is critical that this is kept at a temperature that will prevent bacteria from developing. One common bacterium that can spread through this is Legionella, which causes Legionnaire’s disease. Keeping the water temperature at 120 degrees or higher will prevent bacteria growth.

If the home has a dishwasher that does not pre-heat the water, a setting of 140 degrees may be ideal. When you go above 140 degrees, you put family members at risk for burns from the water. This is important if there are young children in the home, who may not be as careful about the water temperature.

Turning Down Your Hot Water Heater’s Temperature Can Save Money

By turning down the temperature, the hot water heater will use less energy to heat and maintain the temperature of the water. In general, every 10 degrees that you decrease the temperature will result in a 5% saving on your energy bill. Just be sure not to drop the temperature below the 120-degree mark for safety reasons.

The homeowner in Brookline was pleased to have this information. He is starting off with a setting of 130 degrees, hot enough to be safe while still saving a little bit of money on his energy bills each month.


Testimonials & Reviews

We had central air conditioning installed last year by Joyce and were very satisfied with the job. Today, John N. serviced the unit and all of the components and he was incredibly thorough and professional. He explained exactly what was serviced and what to avoid (greenery around the outdoor unit). I highly recommend Joyce Cooling & Heating!

Cristina A.

Cristina A.

Jarod was my technician on March 20th. He was professional and courteous as he completed a servicing on my Heathing Unit. He explained what he was cleaning out and system runs great again.

Matt O.

Matt O.

Mitchell P. came to our house today for an issue with our AC. He was great explaining what the problem is and how they were going to take care of it going forward. He was very pleasant and nice to work with, just like everyone at Joyce Cooling and Heating that has been here.

Cindy A.

Cindy A.

Jim and team did a top notch job on our install. The team was professional, courteous and kept the work areas super clean. I was really impressed with the level of professionalism and the knowledge of the system that was installed. They answered all the questions we had! I also really appreciate how flexible they were with our 3 dogs, they did a great job ensuring materials /parts during install kept tidy to ensure the dogs didn't get into anything. Thanks for the great work!

Jill C.

Jill C.

The representative was friendly, professional, and transparent about the work being done. The issue was resolved. My expectations were satisfied.

Stephen T.

Stephen T.

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