Choosing the Best Tankless Water Heater for Your Home

If you are replacing your water heater, but want a type that is more energy efficient and lasts longer, then a tankless water heater is the best option. They are rated differently than their traditional counterparts. Instead of total gallon capacity, tankless water heaters are rated in gallons per minute and temperature rise, which is the ability to heat water at a given gallon per minute rate.

However, there are a variety of models and sizes available for purchase. So how do you choose which kind is best for your home?

What Size Tankless Water Heater Do I Need?

A basic guide to choosing the right size unit to install in your home:

  • Calculate the maximum number of devices you use and their total flow rate in gallons per minute (gpm) in order to determine the desired flow rate for a tankless water heater that’s best for your home.
    • Average flow rates for common household fixtures:
      • Bathtub: 2.0 – 4.0 gpm
      • Shower: 1.5 – 3.0 gpm
      • Kitchen sink: 1.0 – 1.5 gpm
      • Laundry sink: 2.5 – 3.0 gpm
      • Dishwasher: 1.0 – 3.0 gpm
  • Figure out the appropriate temperature rise by subtracting the incoming water temperature from the desired output temperature.
  • Determine the fuel type you need, such as natural gas or electric. If you are choosing an electric water heater, make sure that:
    • Your water heater is functioning on its own circuit
    • Your home is able to support the amperage draw from the water heater
    • You have the appropriate voltage outlet

Whether you calculate it all on your own or if you work with a plumber to get a more precise number, it's important to call in a professional to help with the final steps of the purchase and installation of your new tankless water heater. Contact our experts at Quality Home Services to find out more information about tankless water heaters in Fresno today.

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