The most important (and often neglected or misunderstood) aspect of purchasing and installing an electric tankless water heater is selecting the proper model for a specific household demand.

So, how do one sizes a tankless water heater for optimal on-demand hot water delivery?

The process of sizing a tankless water heater involves six steps:
1.Temperature Rise
The entire operation of a tankless water heater is based on how hot you want your water to be when you use it. This is called the "temperature rise" and is a simple subtraction of the incoming...