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What Size Water Heater Should I Get?

What Size Water Heater Should I Get?

  • Tankless Water Heater
  • Water Heaters
water heater size in Minnesota by Water Heaters Now

The size of the water heater you purchase is an important consideration. Bigger water heaters may be able to produce more hot water, but they can also get pretty expensive. Also, bigger water heaters may take up too much physical space depending on your home. As the area’s water heater experts, we can help you determine how big your home’s water heater should be.


What factors do I need to consider about the size of my tank water heater?

The biggest consideration for what size of water heater you need is how much hot water you use. Some loose estimates are as follows:

  • 1 to 2 people: 30-40 gallons
  • 2 to 3 people: 40-50 gallons
  • 3 to 4 people: 50-60 gallons
  • 5+ people: 60-80 gallons

Keep in mind that these numbers may not accurately describe your hot water needs. Depending on your schedules, you may still not have enough or too much. For a more accurate reading, you’ll want to check the water heater’s first-hour rating, which is the number of gallons of hot water the heater can supply per hour (assuming it has a tank full of hot water.) You can usually find it in the upper-left corner of the EnergyGuide label. The first-hour rating should be within a gallon or two of your peak hour demand.

To find your peak hour demand, first figure out what time of the day your household uses the hottest water (morning, noon, or evening.) Then, use the example worksheet found on this page to estimate your maximum usage of hot water during that one hour of the day. That’s your peak hour demand.


What about tankless water heaters?

To find the right tankless water heater for your home, you need to determine the best flow rate based on your hot water usage and the temperature rise, which is the necessary change in temperature. First, you’ll want to determine your peak hot water usage as mentioned above. Then, determine the temperature of the water going into your house by turning on a cold faucet, letting it run for a minute, and then using a thermometer on the water. Subtract the temperature you get from the desired water temperature, which is usually 120°F, and you’ll have your temperature rise. With these two numbers, you should be able to find a tankless water heater right for you.


Why trust Water Heaters Now as my local water heater experts?

Master Plumber Raymond Snesrud has been plumbing in the twin cities for 10 years and he says, “I have noticed that there are hundreds of plumbing companies who do thousands of plumbing types of repairs. I have had dozens of employees over the last 10 years, and I have found it very difficult to hire technicians who will respect people and their homes the way they deserve. One day five years ago, it occurred to me that if we only install and repair water heaters, we could become the leading experts at doing one thing.” Call us today to learn more about our water heater services!

By Brian Renadette


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