What is the first step in selecting a hot water heater?

Knowing the required capacity is crucial as it directly influences the performance and efficiency of the hot water system. The capacity determines how much hot water can be supplied to meet the needs of the household or facility effectively. Proper assessment of the required capacity ensures that the chosen hot water heater can handle peak demands without running out of hot water or being excessively large, leading to wasted energy and higher operational costs.

The required capacity is influenced by factors such as the number of fixtures needing hot water, usage patterns, and the peak demand during typical use periods. By establishing these needs first, it allows for more informed decisions in the subsequent steps of selecting a hot water heater, such as installation location, energy source, and type of water heater, ensuring a well-rounded and efficient selection process.