Rheem’s RTGH series condensing tankless water heater is built for homes that need a lot of hot water, fast. Its 199,900 BTU output and 9.5 GPM flow rate can handle multiple showers and a running appliance simultaneously. This is a high-capacity indoor unit designed for propane systems, and its condensing design captures extra heat that traditional models waste.

The real-world benefit is consistent temperature. Rheem’s Hot Start Programming keeps the unit in a ready state, which practically eliminates the annoying cold water sandwich you get between back-to-back uses. An Overheat Film Wrap provides a safety net for the heat exchanger. You get a steady stream of hot water without the wait or the temperature swings.

Installation is not a DIY project. This heater requires professional setup, including proper venting and gas line sizing to reach its full potential. For a large household with high simultaneous demand, it delivers reliable performance. Just ensure your home’s propane supply and water pressure are sufficient to support it.