At Discount Water Heaters, we’re all about keeping things simple — and that includes helping you get the most out of your water heater without overcomplicating it. One of the most common questions we hear is:
“What temperature should I set my water heater to?”
The short answer?
120 degrees Fahrenheit is the sweet spot for most homes.
Let’s break down why this matters and how it could save you money and even protect your health.
Why 120 Degrees Is the Ideal Setting
There’s a reason why the U.S. Department of Energy recommends 120°F. It hits the balance between comfort, safety, and efficiency:
- Prevents scalding – Water that’s too hot (like 140°F) can cause serious burns in just a few seconds, especially for kids or older adults.
- Reduces energy use – Lowering your water heater from 140°F to 120°F can save you up to $60 a year in energy costs.
- Minimizes wear and tear – Less heat means less stress on your water heater and plumbing system over time.
- Prevents bacterial growth – 120°F is hot enough to prevent harmful bacteria (like Legionella) from multiplying in most homes.
When You Might Consider a Higher Setting
There are some cases where setting your water heater to 130–140°F might make sense:
- Medical concerns – If someone in your home has a compromised immune system, higher temps might be recommended.
- Larger households – More people = more hot water. A slightly higher setting can help meet the demand.
- Older water heaters – If your unit isn’t performing like it used to, you may need to crank it up a bit until it’s replaced.
Just remember, if you go above 120°F, consider installing anti-scald devices at your faucets or showers for safety.
How to Check and Change Your Water Heater Temperature
Step 1: Check the thermostat.
For electric water heaters, look behind the access panels. For gas, it’s usually a dial near the bottom.
Step 2: Adjust if needed.
Use a flathead screwdriver to gently turn the thermostat to 120°F. If your dial isn’t labeled, you can test the water temperature with a cooking thermometer after a few hours.
Step 3: Save your settings.
Once you’ve set it, you’re good to go — just check it every now and then, especially if you notice temperature changes at the tap.
Want to Save More? We Make It Simple.
If your water heater is over 8-10 years old, struggles to keep up, or has inconsistent temps — it might be time for a replacement. At Discount Water Heaters, we make the process easy:
- Same-day installation
- Low prices- Guaranteed
- Quotes without a sales visit
- Easy financing options
We’re not here to sell you what you don’t need. We’re here to keep it simple and save you money.
Still have questions?
Give us a call or shoot us a message. We’re happy to help — no pressure, just honest advice. (772) 202-6671