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Optimizing Your Tankless Water Heater: Finding The Perfect Temperature
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posted by brian schultz
Switching to an electric tankless water heater means saying goodbye to the limitations of a traditional tank and hello to on-demand hot water. But to get the most out of your unit, setting the right temperature is key—not just for comfort but also for safety and efficiency.
Conventional tank water heaters are typically preset between 120-140 degrees Fahrenheit to prevent bacterial growth inside the tank—because nobody wants their plumbing turning into a petri dish. At these temperatures, you can burn your skin in 30 seconds or less, which is why most households end up mixing cold water at the faucet—wasting both energy and water in the process.
Benefits of Lowing Your Temperature
With an Optimal° electric tankless water heater, you’re in control. Unlike traditional tanks, there’s no stagnant water, so you don’t need to set the temperature as high to ensure safety. We recommend adjusting your unit to 105-110 degrees—a comfortable range that provides instant hot water without mixing in cold.
Lowering the set temperature offers two key benefits:
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Maximized Energy Efficiency: Your unit won’t have to work as hard to heat water, reducing power consumption and helping you save on energy bills.
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Increased Flow Rate: The lower the temperature setting, the more gallons per minute (GPM) your heater can deliver—so you can enjoy a steady stream of hot water.
How to Set Your Temperature for Efficiency & Comfort
Your Optimal° heater comes preset at 120 degrees, but many homeowners find that 105 degrees is perfect for showers and daily use. The beauty of a tankless system is that you can fine-tune your temperature to exactly what you need—no more overheating and cooling at the faucet.
For best results:
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Start at 105°F and adjust in small increments based on your preference.
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If you prefer slightly hotter water for kitchen use, set your heater to 110-115°F.
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Avoid going above 130°F—this wastes energy and increases the risk of burns.
One of the biggest perks of an electric tankless water heater is the ability to set your ideal temperature without the inefficiencies of a traditional tank. By keeping your unit at a comfortable 105-110 degrees, you’ll enjoy instant hot water, lower energy costs, and a safer experience—all while maximizing your heater’s performance.
Looking for more tips? Contact our team for expert guidance at sales@itsoptimal.com or call 386-OPTIMAL.
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