11.1 GPM 199,000 BTU Condensing Tankless Water Heater with Recirculation Pump

The RXP199iN is Rinnai's condensing, natural-gas tankless water heater, built for homes that want a continuous hot-water supply without a storage tank. It installs indoors or outdoors and suits households running multiple fixtures at once, such as a shower and a dishwasher together, without running out of hot water.

It delivers up to 11.1 GPM of flow and a maximum input of 199,000 BTU, with Rinnai's Sensei Super High-Efficiency Plus rated at 98% UEF. The unit runs on 120-volt power and includes a built-in recirculation pump with Smart Circ intelligent recirculation, which learns household hot-water patterns and can be triggered by wireless push buttons.

Installation is wall-mounted and requires a direct-vent connection, with 2-inch venting rated for runs up to 75 feet. Rinnai's Smart Sense gas control system and the Rinnai Central app support setup, service, and troubleshooting. A qualified installer should confirm clearances, gas-line sizing, and local code before the unit goes in.

This listing is for the water heater itself. Gas piping, electrical connections, mounting hardware, and venting materials are not included unless stated.

Rinnai backs this natural-gas configuration with a limited residential warranty of 15 years (or 12,000 hours) on the heat exchanger, 5 years on parts, and 1 year on labor; commercial coverage is 8 years (or 12,000 hours) on the heat exchanger, 5 years on parts, and 1 year on labor.

Delivery and returns: this water heater ships free by ground delivery and arrives within the window shown above. If it is not the right fit, return it free within 30 days in its original packaging.

• Installation and clearances

  This heater is for wall-mounted installation in an indoor or outdoor location. Confirm the installation clearances, mounting surface, combustion-air path, drain route, and service access before a qualified professional sets the unit in place.

• Direct venting

  Direct venting is required. The source lists a minimum 2-inch vent diameter and supports up to 75 feet of 2-inch venting with the high-efficiency pump. An outdoor installation needs the compatible Versa Vent adaptor, which is not included.

• Natural-gas supply

  Connect a properly sized natural-gas supply for the 199,000 BTU maximum input. Gas-line sizing, pressure, shutoff, and local code checks belong to a qualified installer. This listing is for natural gas, with no propane variant offered here.

• Flow and temperature rise

  The published flow rate runs from 0.13 to 11.1 GPM, with a 0.26 GPM minimum listed in the specification table. Temperature rise depends on incoming water and demand; the same table lists 98°F minimum and 120°F maximum settings.

• Controls and recirculation

  Smart controls connect setup and service functions through the central app, while the built-in recirculation pump learns hot-water use. Wireless push-button activation and a four-speed DC pump support convenient recirculation when the system is configured.

• Condensing efficiency

  The condensing design is rated at 98% UEF, and the high-efficiency system uses a four-speed DC recirculation pump. That efficiency rating describes the heater's published energy performance, while site conditions and installation affect actual use.

• Flush and maintain

  Quick Flush simplifies routine flushing, and the service plan should include periodic descaling and maintenance. Follow the installation manual for cleaning intervals, water conditions, condensate care, and service steps rather than treating the heater as maintenance-free.

• Warranty coverage

  The published residential warranty is limited to 15 years or 12,000 hours on the heat exchanger, 5 years on parts, and 1 year on labor. Commercial coverage lists 8 years or 12,000 hours on the heat exchanger, 5 years on parts, and 1 year on labor.

• What arrives

  The package includes the direct vent, venting kit, and insulation blanket listed for this heater. The gas connection, 120-volt electrical connection, mounting hardware, condensate management, and any adaptor not listed must be arranged for installation.

Good to know

• The cabinet measures 18.5″ wide × 11.4″ deep × 30.11″ high and weighs 58 lb.
• Allow required clearances and service access around the wall-mounted cabinet.
• Plan direct venting, natural-gas supply, 120-volt power, and condensate routing.
• Professional installation required for wall mounting, natural-gas connection, direct venting, electrical supply, and condensate routing.
• Heater and installation-reference images are shown for this product. Gas piping, electrical connections, tools, and additional installation materials are not included unless listed.