The Titan N-120 is the most popular model for average size homes. This space saving water heater will provide "endless" hot water for your entire home, apartment and other locations. As the Titan only heats the water when it is needed your energy savings on hot water can be up to 60%! In many cases your energy savings in the first year will pay for your investment in a state of the art Titan Tankless Water Heater. The Titan N-120 will replace an entire conventional tank heater with no disruption to your comfort. Let's not forget the endless hot water you will experience. You won't have to worry about running out of hot water for your guests after repeated showers! The Titan is recommended for warmer climates where the incoming water temperature is above 65 degrees (F).