While turning the temperature up higher can result in burns, turning it lower than the recommended setting can also be dangerous. Avoid setting your water heater to a temperature higher than 120 °F (49 °C). It all depends though, on the size of your water heater and the number of machines using your water heater, as well. So if B is too hot, set it to A; if B is too cool, crank it up to C. Generally, A should be as hot as you need, but habits vary. Similarly, the U.S. Occupational Safety and Health Administration (OSHA) recommends the 140-degree setting for preventing Legionnaires’ disease. Be Careful! C is hotter than B which is hotter than A. But if you’re doing a quick temp check, you should be fine on your own. Here's how to change the temperature on your tankless water heater. The 140 degree setting is more for a commercial application and not for home showers. If you think the setting is too high, you may need to lower it. Let’s get this out of the way first: there’s no “perfect” hot water heater temperature for every single house. Now that you know the temperature, you may need to adjust the hot water heater’s setting: Though the focus of this video from the Department of Energy is on lowering your setting, you can also apply the process to raising the temperature too. Tank water heaters are typically located in the garage, basement or attic. If you drop the temperature down to 120 degrees Fahrenheit, energy experts claim that you could potentially save hundreds of dollars in a lower energy consumption. The U.S. Department of Energy recommends the 120 degree-mark for both maintenance and savings purposes. In common, the A B C knob has different temperature settings. Water heaters are set from the factory to heat water to a maximum of 120 degrees Fahrenheit. Their biggest argument, though—being the Department of Energy and all—is that setting your hot water heater to 120 degrees instead of 140 degrees can save you energy, and therefore money: Savings resulting from turning down your water heater temperature are based on two components: reduced standby losses (heat lost from water heater into surrounding basement area); and consumption (from water demand or use in your home). Homeowners with a dishwasher that does not pre-heat the water may want to set their water heater to 140 degrees. Elderly homeowners or those with small children may want to keep the temperature at 120 degrees. Perhaps your hot water isn’t hot enough no matter what setting your water heater is on. Oftentimes, water heaters will have additional options to either lower or increase the temperature of the water inside. So, what is the best temperature range for your water heater? In general, many who live alone aim for a lower temperature in the acceptable range since demand for hot water is less and it saves money. This way it leads to emit fewer greenhouse gases, which helps us to save our environment. Hot Water Can Cause Severe Burns! Don’t set your water heater to anything below 120 degrees, as diseases can develop in the stagnant water inside the water heater, particularly Legionella, which is quite dangerous. A water heater set to 120 degrees may be just fine for most people. Your hot water isn't the only thing that needs to be "just right." Many who live in large household aim for a higher temperature to accommodate increased demand for hot water. Oftentimes, water heaters will have additional options to either lower or increase the temperature of the water inside. In the case of the video’s water heater, A, B and C each have an increase of about 10 degrees. If you’re worried about pathogens in your hot water, and are worried about scalding water, consider a hot water tank booster. Mr. Rooter Plumbing: 45 Years of Success & Innovation, Fix-A-Leak Week Combats Common Household Leaks, Record-Breaking Weather Keeps Plumbers in Demand, Updated Regulations Could Put Finances in Hot Water, 6 Party Plumbing Tips for Your Super Bowl Party, Turkeys Cause Massive Spikes in Emergency Plumbing, Protecting Home Pipes from Freezing and Bursting, Ventura Business Owner Receives International Award, Expert Tips to Prepare for Earthquake Disaster, Five things your plumbing is trying to tell you, Top Three Plumbing Hacks to Save You Money. Temperatures maintained below 140°F (60°C) encourage growth of Legionella bacteria and other microorganisms! Ok, maybe I'm missing something here, but wouldn't you just set the heat of your water heater to a higher level and then use the cold and hot knobs at each sink/tub to set the ideal temperature? If you need help adjusting your hot water heater or troubleshooting any problems, call your local Mr. Rooter Plumbing at (855) 982-2028, or request an estimate online. Every water heater is preset in America to 120F by the manufactures, but some states like Wisconsin require the water heater temp to be at least 125F. If we set temperature of water heater at 120°F, it will burn less gas or fuel or consume less electricity. They relate to the relative temperature of the hot water. With proper maintenance and care, your water heater will last for years. I set mine at 125F, which is the recommended setting for my REEM water heater. In the case of the video’s water heater, A, B and C each have an increase of about 10 degrees. Guidelines from the department explain that most hot water heaters are automatically set to 140 degrees Fahrenheit, but that’s usually unnecessary. This can be prevented by setting the water heater to a temperature where the bacteria Legionella cannot thrive. Know the Ideal Setting: The best setting for gas water heaters is around 115 to 120 degrees Fahrenheit. Setting the water to a higher temperature increases the risk of scalding. It all depends though, on the size of your water heater and the number of machines using your water heater, as well. If your water heater is now set to 140°F note that you can save 3% to 5% of the energy consumption for each 10°F you lower the temperature. REMOVE THE COVERS – using the phillips-head screwdriver. Step 1: Check you water heater temperature setting. Residential tank water heaters typically store between 20 and 80 gallons of hot water hot throughout, usually at the factory setting of 120°F. The mixing valve takes the hot water from the newly set heater (140°F) and mixes it with cold water until it can be released from the valve at a safe 120°F temperature. Residential tank water heaters typically store between 20 and 80 gallons of hot water hot throughout, usually at the factory setting of 120°F. The purpose of this page is to show WHERE THE WATER HEATER TEMPERATURE CONTROLS ARE LOCATED to change the temperature on your water heater. Resist deposition of mineral Hard water buildup mineral … On the other hand, the EPA suggests turning the thermostat down to 120 to reduce power consumption, and a booster heater to … 120 Degrees is the Suggested Setting!!! Place the screwdriver into the center of the temperature dial. Most hot water heaters have a A-B … But finding that setting on the water heater temperature setting dial isn’t easy, because most dials aren’t labeled with numbers. Additionally, if you have a dishwater that doesn’t pre-heat the water, you’re either going to want to set your hot water heater to 140 degrees. It is estimated that the average water heater temperature is set to 130ºF in the United States.130ºF IS THE BEST TEMPERATURE TO SET YOUR WATER HEATER as it will reduce the risk of scalding while showering but also be hot enough to meet your dishwasher and … If you live in a large home where it takes a long time for hot water to reach the tap, a hot water circulating system can solve this. U.S. Occupational Safety and Health Administration (OSHA). Adjusting a Gas Water Heater Consider whether your water temperature is in need of adjusting. 160 degrees fahrenheit temperature setting would be considered a HOT setting. The last, C knob setting stands for 150 degrees. If you have a house, you probably have some sort of hot water heater. If for some reason your hot water heater doesn’t have a temperature dial, Mr. Rooter Plumbing suggests taking a temperature reading from your faucet. Mr. Rooter is a registered trademark of Mr. Rooter LLC Copyright © 2021 Mr. Rooter, All rights reserved. So what’s the ideal hot water heater temperature? Set it at 120 degrees and increase the temperature in small increments until you find the perfect shower temperature. Like most things, it depends on your household’s needs, including whether any children or elderly people are living with you, and whether anyone has a compromised immune system. Your home’s water heater is one of the most important components of your plumbing. For the A knob, the temperature is 130 degrees. However, there is less danger of bacterial growth in smaller domestic hot water tanks. • The water heater and/or pipes are located in an area with high ambient temperatures (e.g., an attic). Turning the screwdriver clockwise will increase the temperature of the water that the heater will produce. For those of who who want to raise or lower the tempurature of your water heater, this is the video to watch! But…. It is estimated that the average water heater temperature is set to 130ºF in the United States.130ºF IS THE BEST TEMPERATURE TO SET YOUR WATER HEATER as it will reduce the risk of scalding while showering but also be hot enough to meet your dishwasher and … Summary of Setting the Temperature of Your Tankless Water Heater. WARNING!!! But there’s no universal temperature for “hot” water—this is something you have to set yourself. Whether you have a gas or electric water heater, the default temperature set from the factory will be between 120ºF to 140ºF. Tank water heaters are typically located in the garage, basement or attic. When the temperature finally drops to the point where we can turn on our heaters, remembering the most energy-efficient thermostat setting can be as perplexing as remembering why you walked into the room. Here’s what you need to know. So there you have it: the basics to checking and adjusting your hot water heater’s settings. Sometimes people call in because their tankless water heater keeps cutting on and off. Most of the time we find that when we go out there that the water heater is set too hot. Having said that, if you don’t live with anyone who fits into the categories above, 120 degrees Fahrenheit is probably the best temperature setting for your hot water heater. Don’t set your water heater to anything below 120 degrees, as diseases can develop in the stagnant water inside the water heater, particularly Legionella, which is … You can save a little energy and money by decreasing the water heater’s burden. C is hotter than B which is hotter than A. Lowering the temperature on your heater will save you money on your energy bill. Another argument for the 120-degree setting: if you have children or older people in your house, they are less likely to get scalded by water from the tap at this temperature. Some of the reasons are: • Incoming water temperature is higher than the set point (e.g., solar-heated water). Click here for our precautionary measures. You can find your current temperature setting by looking at the dial on the water heater (if equipped) or taking a temperature reading from the faucet. The recommended temperature setting is between 115 degrees and 120 degrees. Of course it is possible to change the water heater settings on your hot water heater. Every water heater is preset in America to 120F by the manufactures, but some states like Wisconsin require the water heater temp to be at least 125F. The arguments for 120°F temperature setting: If we set the water heater temperature at 120°F, we may get the following advantages as advice by the American Society of Sanitary Engineering – Helps to cut down bills. Determine What Type You Have. Still undecided? Fortunately, most water heater types are adjusted similarly. 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