Whole House Electric Tankless Water Heater Sizing

The right size is a tankless water heater that can heat enough gallons of water to a specific temperature per minute to keep up with the demand.

Whole house electric tankless water heater sizing.

Having a water heater that is too small will result in it not being able to produce enough hot water for your household demand. The whole house tankless water heater is normally designed with a large flow rate but do not be fooled by the name the size of the whole house type is smaller than imagine because no tank involves. We already covered gpm. If you want a normal 105 degree shower that means you have a 58 degree temperature rise 105 47 58.

Let s continue our example with a popular product the bosch 1600p ng tankless water heater. If you want to upgrade your water heater size from 40 or 50 gallons storage water heater or replace it you won t necessarily need a big tankless water heater. For example an electric tankless heater that is rated at raising the water temperature 55 degrees at 1 5 gpm will supply you with a 120 degree temperature if the incoming water is 65 f or higher. Rheem tankless electric water heaters make it easy to enjoy instantaneous continuous hot water space saving design and significant energy cost savings.

In fact it is the most important part of choosing a new unit for your home. We re here to help you. Tempra is manufactured by stiebel eltron a pioneer and leader in tankless water heating technology for over 90 years. For example you might not be able to run more than one shower at a time without someone getting an arctic blast of cold water.

After that view our sizing guide pdfs which offer further guidance on choosing an appropriate tankless model for your application. Choose the right tankless electric water heater for you. Before we get to how to use the calculator to size a tankless water heater let s talk about the factors that go into understanding what size inline water heater you need. Now you need to understand what temperature rise means.

As a result you need to look at the tankless water heater s gpm flow rating based on a 58 degree temperature rise. Size matters when it comes to your tankless water heater. With the small and stylish compact size it is capable of saving a large amount of space in your home. Tankless water heaters are rated by the maximum temperature rise possible at a given flow rate.

Tankless electric water heating. Therefore to size a demand water heater you need to determine the flow rate and the temperature rise you ll need for its application whole house or a remote application such as just a bathroom in your home. Just follow the three simple steps below to choose the right model and size you need.