Choosing the right temperature setting for your water heater comes down to finding the right balance of safety, efficiency and practicality. In general, water temperatures above 120°F are not necessary for many household tasks. Laundry, dishwashing, and bathing can all be effectively accomplished at or below this temperature, making higher settings wasteful.
While it might seem like a good idea to always have very hot water available, the potential risks and costs usually outweigh the benefits.
Optimal Water Heater Temperature Setting for Safety and Efficiency
We recommend setting it at 120°F (49°C) or lower. Why this temperature? Let’s break it down:
Safety First – Preventing Scalding
Water temperatures above 120°F can cause severe burns, especially for children and the elderly who are more vulnerable and may accidentally turn on the hot water. By keeping the temperature at or below this level, the risk of scalds is significantly reduced. A safe bath water temperature for kids is 100°F.
Installing an anti-scald device to prevent excessive hot water is essential in households with vulnerable residents such as young children or elderly adults.
Energy Efficiency For Lower Costs
After heating and cooling, water heaters are among the most energy-intensive appliances in the average Montana home. Every 10 degrees reduction in your water heater’s temperature can save you around 3-5% in energy costs.
Extending the Lifespan of the Water Heater
Another often overlooked disadvantage of setting the water heater temperature too high is that it can accelerate wear and tear. The elements in electric water heaters and the burners in gas models can degrade faster under higher temperatures, leading to more frequent repairs and earlier replacement.
Setting the water heater thermostat to 120°F or lower strikes a good balance between providing hot enough water for household needs and keeping energy costs down.
Preventing Over-Pressure
Water heaters are designed to handle specific pressure levels. Excessively high temperatures can raise the water pressure beyond these levels, potentially leading to leaks or even a rupture. This is why water heaters have temperature and pressure relief valves, but consistently high temperatures can put undue stress on these safety features.
How to Adjust Your Water Heater Temperature
Most water heaters have a dial near or digital pad at the bottom of the tank to adjust the temperature. Be sure to read the manufacturer’s instruction to ensure safe operation. After adjusting the temperature run hot water at a faucet for at least a minute, then use a thermometer to check the water temperature. The temperature may not match the set temperature precisely, but it’s important to check that it is not overheating the water.
Additional Tips for Water Heater Efficiency
Regular Maintenance
Ensure regular maintenance of your water heater. Annual flushing of the tank will prevent sediment build-up that can affect temperature settings and efficiency. The plumbers at Central can help maintain your water heater to ensure it is running safely and efficiently.
Insulation
Consider insulating older water heater tanks and pipes to improve efficiency. Use insulation specifically designed for water heater tanks.
Upgrade
If your water heater is old, consider upgrading to a more energy-efficient model. The cost saving in lower energy bills can make it a wise investment.
Setting your water heater to the right temperature is important for safety, efficiency and maximizing the lifespan of the unit. Have questions about your home’s water heater? At Central Heating Cooling Plumbing Electrical in Kalispell, we are always here to help with your plumbing needs. Don’t hesitate to contact us for any water heater or plumbing concerns.
