9 GPM 160,000 BTU Condensing Tankless Water Heater with Recirculation Pump

The RXP160iN is Rinnai's condensing, natural-gas tankless water heater with a built-in recirculation pump, sized for homes that want continuous hot water at the faucet without a storage tank. It installs indoors or outdoors and mounts to the wall.

It is rated for a maximum input of 160,000 BTU and a maximum flow of 9.0 GPM, with a listed efficiency of 97% UEF. The unit runs on 120-volt power. The cabinet measures 30.11 inches high, 18.5 inches wide, and 11.4 inches deep, and weighs 57 pounds.

Installation requires a direct-vent connection at a 2-inch minimum diameter, rated up to 75 feet. The built-in pump runs Smart Circ intelligent recirculation, which learns hot-water usage patterns and can be scheduled or triggered by push buttons (the RWM200 wireless module, sold separately, adds remote control). A qualified installer should confirm clearances, gas-line sizing, and local code before the unit is mounted.

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

Rinnai's limited warranty covers this natural-gas unit's heat exchanger for 15 years, parts for 5 years, and labor for 1 year for residential use.

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 wall-mounted unit is listed for indoor or outdoor placement. Plan around the published dimensions and required clearances, then have a qualified installer confirm the wall, connections, combustion-air approach, condensate path, and local code requirements before installation.

• Venting Requirements

  Direct venting is required, with 2-inch venting up to 75 feet listed in the source feature copy. The source also identifies an outdoor vent adapter sold separately. Confirm the approved vent layout, termination, clearances, and adapter requirements in the installation manual.

• Natural Gas Supply

  This listing is the natural-gas RXP160iN configuration and ships as one fuel-specific variant. Its 160,000 BTU maximum input makes gas-line supply sizing an installer decision. Verify natural-gas pressure, line size, connections, and local code before ordering installation materials.

• Flow and Temperature Rise

  The source lists 0.13 to 9.0 GPM, while delivered flow depends on temperature rise, incoming water conditions, fixture demand, and installation. The details table states 120°F maximum temperature, while feature copy states 140°F; use the current manual and installer guidance to resolve that difference.

• Controls and Recirculation

  The built-in pump learns hot-water usage patterns and can schedule recirculation. The source says timers and push-button control require the RWM200 wireless module, sold separately. App-connected setup, service, and troubleshooting are also described, so confirm compatible controls and network requirements before planning the loop.

• Efficiency and Power

  This is a condensing tankless heater with 97% UEF stated in the source marketing copy and a 120-volt electrical requirement in the details. Confirm electrical service, condensate handling, vent materials, and the installation requirements for a condensing appliance with a qualified professional.

• Descaling and Maintenance

  The source describes simplified flushing and lime detection. Water chemistry and use conditions affect service intervals, so follow the manual for flushing, descaling, cleaning, and inspection. Keep maintenance records and have a qualified service professional address error codes or recurring temperature issues.

• Warranty Terms

  The source lists a limited residential warranty with 15 years on the heat exchanger and 5 years on parts. Its labor language differs between source blocks, including a 90-day registration condition, so verify the current written warranty, registration deadline, and coverage terms before installation.

• What Ships

  The source identifies the tankless water heater but does not publish a complete box-contents list. The outdoor vent adapter and RWM200 wireless module are described as sold separately. Confirm included parts, venting, controls, and other required installation materials before scheduling the work.

Good to know

• 18.5 inches W x 11.4 inches D x 30.11 inches H; wall mounted.
• Natural-gas RXP160iN configuration; verify gas-line sizing.
• Direct vent required; 2-inch venting is source-listed up to 75 feet.
• Professional installation is required for gas, venting, electrical, and condensate connections.
• Water heater only. Installation materials and other items shown are not included unless stated.