Rinnai has been a quiet leader in tankless water heaters for decades. The REP160eN stands out because it thinks ahead. Its Smart-Circ system learns your daily hot water habits, activating its built-in recirculation pump only when you typically need it. This means hot water arrives faster at your shower in the morning, but the system isn’t wasting energy circulating water all afternoon while you’re at work.

With a maximum flow of 6.1 gallons per minute, this 160,000 BTU outdoor unit can supply two substantial showers simultaneously. The key is consistency. You won’t get the temperature fluctuations or the sudden cold shock that can plague older tank systems. It provides a steady stream for as long as you need it. Installation is simplified since it’s designed for outdoor mounting, venting concerns are eliminated, and the included recirculation pump saves on upfront costs.

The upfront investment is higher than a standard tank heater, and a professional installation is non-negotiable for gas line and water connections. For a busy household tired of running out of hot water, however, the REP160eN delivers immediate, endless supply with a clever efficiency that pays off over time.