Choosing a new tankless water heater for a home — whether the application is totally new or a replacement — demands a strategic approach that will inevitably impact the efficiency of the owner’s day-to-day routine. The tankless unit selected must produce enough hot water for all of the household’s demands, so selecting the appropriately sized model is imperative.

With tankless water heaters, water is heated on demand, removing the need for storage. If a unit is undersized, water will still warm to the temperature you set during installation; however, as heated water starts to run out, water flow will drop to uncomfortable levels to maintain that set temperature.