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 water…

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