Tankless Water Heater Dimensions

Use our handy calculator to determine your needed flow rate and temperature rise then find models that match your needs.

Tankless water heater dimensions.

The dimensions vary slightly based on the model you choose. And your temperature rise which is determined by your incoming water temperature subtracted from your hot water setting. To learn find the right product go to our tankless water heaters page. Tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted.

Looking to purchase a new tankless water heater but having trouble figuring out what size or model you need. Some models can even be installed indoors or outdoors based on your needs. Size matters when it comes to your tankless water heater. Tankless water heaters are rated by the maximum temperature rise possible at a given flow rate.

Having a water heater that is too small will result in it not being able to produce enough hot water for your household demand. Most rinnai tankless water heaters are only about the size of a rolling suitcase. 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. What size tankless water heater depends on your gpm at peak hot water demand.

As an example i will show you what came out for me. Electric units have measurements in the 10 inch high to 7 inch wide range while gas fired. 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.