When it comes to water heater temperatures, there is a fine balance between safety and comfort. While everyone loves a warm, steamy shower, it is important to remember that children and the elderly are at a higher risk of scalding. Before you change the temperature setting on your water heater, there are a few important factors you should keep in mind.
What To Consider When Setting Your Water Heater’s Temperature
To make sure your water heater has the right temperature, you may want to get out a thermometer and test the water. Many water heaters have basic dials for changing the temperature, so they don’t show a numeric value. You can test the actual temperature through a few simple steps.
First, don’t use the water for at least an hour so that the tank has time to warm up. Then, fill up a glass of water from the faucet. You will probably want to let the faucet run for a couple of minutes so that the water reaches its maximum temperature. Afterward, you can use a kitchen thermometer to see where the temperature level is at.
Once you have tested the water, you can decide if you want to make it hotter or colder. Normally, most homeowners keep their water heater at 120 to 140 degrees Fahrenheit. Where you set it in this range depends on a few factors.
The Presence of Immunocompromised Family Members
Many types of bacteria flourish when the water setting is less than 120 degrees Fahrenheit. Because of this, you may want to set your water temperature higher if any of your family members are immunocompromised.
Comfort
Comfort plays a major role in water heater settings. If you don’t like hot water, a lower setting is a good choice. Meanwhile, warmer settings make sense if you enjoy warm water and aren’t worried about anyone getting scalded unintentionally.
The Existence of Children and Elderly Family Members
Elderly family members and children have extremely sensitive skin, so they are more likely to get burned by hot water. If an elderly individual has dementia, they are more likely to turn on their shower to an exceptionally hot level and remain in the scalding water. The same risk can occur with children, so use a lower setting for the very young and old.
Energy Concerns
Your water heater uses more energy than almost all of your household appliances and heating systems. Because of this, a simple change to your water heater’s temperature setting can result in impressive cost savings on your utility bill.
Wear and Tear
Anytime you heat your water more, it requires additional work. This results in added wear and tear on your water heater. While professional maintenance services can offset some of the added wear, it’s important to remember that higher temperature settings may result in a shorter lifespan for your water heater.
What Is the Ideal Water Heater Temperature Setting?
The bacteria that causes Legionnaires’ disease can exist in water that is up to 122 degrees Fahrenheit. Because of this, you shouldn’t set your water heater below 120 degrees Fahrenheit. Likewise, you should avoid temperatures that are higher than 140 degrees Fahrenheit because this can lead to scalding and third-degree burns. For most homes, the ideal temperature is toward the lower end of this spectrum.
Boost Your Water Heater’s Longevity Through Routine Maintenance
At Benjamin Franklin Plumbing, we recommend getting your water heater serviced at least once a year. Routine maintenance and flushing your tank can help extend the lifespan of your system. During the maintenance visit, one of our plumbers can inspect the water heater for any damage, make necessary repairs, and discuss any of your concerns.
FAQ’s – Water Heater Temperature Settings
What is the recommended temperature setting for a water heater?
Many experts recommend setting a water heater to 120°F to balance safety, comfort, and energy efficiency.
Why is 120°F considered the ideal water heater temperature?
This setting helps prevent scalding while still providing enough hot water for daily household use.
Can I set my water heater higher than 120°F?
Yes, but higher temperatures can increase the risk of burns and raise energy consumption.
Does lowering the water heater temperature save energy?
Yes. Lowering the temperature can reduce energy usage and help lower monthly utility bills.
What temperature should a water heater be set to prevent bacteria?
Some households set water heaters to 140°F to reduce the risk of bacteria, though mixing valves may be recommended for safety.
How do I adjust the temperature on my water heater?
Temperature adjustments are usually made using a thermostat dial on the tank or a digital control panel.
Why does my hot water feel too hot or not hot enough?
Incorrect thermostat settings, sediment buildup, or a malfunctioning heating element may affect water temperature.
Should the temperature setting be different for tankless water heaters?
Tankless systems are often set between 120°F and 125°F, depending on household preferences and usage.