RSC Series Recirculating Tankless Water Heater

The RSC Series uses Rinnai's Smart-Circ Intelligent Recirculation, which studies hot water usage over a seven-day period and then schedules pump and recirculation timing to match it automatically.

That timing intelligence is built into the unit itself, so there's no separate exterior timer to install, and it's powerful enough to serve up to six fixtures around the home at once.