How To Select The Perfect Tankless Water Heater

How To Select The Perfect Tankless Water Heater

Posted by Andy Mai on Mar 30th 2017

We at SioGreen understand that selecting the perfect water heater can be pretty difficult at times. Improper sizing can cause a system to under perform, therefore, not provide enough hot water based on your needs. Fortunately, we have a tool that will help you select the perfect electric tankless water heater for your home. Follow the steps below and you’ll be happy that you did.

Step 1: Select the inlet ground water temperature. The colder the water, the more the power is required to meet water heating demand.


Step 2: Select your application highlighted in “blue” on the right. The gallons per minute (GPM) can vary based on your faucet and shower. Please keep in mind the recommendation is based on how many applications are running at the same time. Water saving shower heads have an average of 1.5 GPM.

Step 3: Select your water heater. For warmer climates, you will have more options than colder climates. Please make sure that your electric service panel has enough power available for your desired system. Contact your local electrician and plumber for installation.

Step 4: Purchase your tankless water heater, take pictures of your great installation, and submit your warranty.

Step 5: Enjoy saving money, saving space, hot water, and never have to worry about maintenance again!

If you have any questions or concerns, please contact or call 888-270-8452.

Learn more at

Here’s the link to our tool: