160,000 BTU Condensing Tankless Water Heater

The RX160iN is Rinnai's condensing, natural-gas tankless water heater, sized for homes that want continuous hot water without a storage tank. It installs indoors or outdoors and mounts to the wall in a compact, silver-finished cabinet.

It is rated for a maximum input of 160,000 BTU and a maximum flow value of 9 listed on the spec sheet. The unit runs on 120-volt power and is Mobile Home approved.

Installation is wall-mounted with a direct-vent connection, and Rinnai's Smart Sense gas control system and Rinnai Central app support setup and service. Recirculation is field-convertible with an internal pump kit, 2-inch venting runs up to 75 feet, and outdoor installation uses a separately sold outdoor vent adaptor with lime detection. A qualified installer should confirm clearances, gas-line sizing, and local code before installation.

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 for 15 years (or 12,000 hours) on the heat exchanger, 5 years on parts, and 1 year on labor for residential use; commercial coverage is 8 years (or 12,000 hours), 5 years, and 1 year respectively.

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

  Wall-mounted installation is required for this compact cabinet. Confirm indoor or outdoor placement, required clearances, the mounting surface, combustion-air path, condensate route, and service access with a qualified professional before work begins.

• Direct venting

  Direct venting is required, with a 2-inch minimum diameter listed in the source. The feature list also describes 2-inch venting up to 75 feet. Outdoor placement needs the compatible vent adaptor, sold separately.

• Natural-gas supply

  This listing is for the natural-gas configuration. Size the gas line for the 160,000 BTU maximum input, then confirm pressure, shutoff, connections, and local code requirements with a qualified installer. Propane is not the selected variant.

• Flow and temperature rise

  The source lists a 0.13 gallons-per-minute minimum flow rate and a maximum flow-rate value of 9. Temperature settings are listed from 98°F to 120°F; actual temperature rise depends on incoming water and household demand.

• Controls and recirculation

  Smart controls support mobile setup and service functions. Recirculation is field-convertible with an internal pump kit, so plan the pump configuration, control location, piping, and electrical requirements with the installer. The pump kit is a separate installation consideration.

• Condensing efficiency

  Condensing operation is the efficiency focus of this design, with the source marketing text describing high-efficiency performance. Actual energy use depends on temperature rise, demand, gas supply, venting, and professional installation.

• Descaling and maintenance

  Use the listed flush feature as part of a planned service routine. Periodic descaling, cleaning, condensate checks, and maintenance depend on water conditions and local guidance; follow the installation manual and have service performed as recommended.

• Limited warranty

  Warranty coverage is limited: residential terms list 15 years or 12,000 hours on the heat exchanger, 5 years on parts, and 1 year on labor. Commercial terms list 8 years or 12,000 hours on the heat exchanger, 5 years on parts, and 1 year on labor.

• What ships

  The included product is the listed tankless heater. The outdoor vent adaptor is sold separately; confirm any venting, gas piping, electrical, mounting, condensate, or other installation materials with the professional before scheduling the work.

Good to know

• Cabinet: 18.5″ W × 11.4″ D × 30.11″ H; 54 lb.
• Wall-mounted; plan direct venting and required service clearances.
• Natural-gas configuration; 120 V; indoor or outdoor location.
• Professional installation is required for wall mounting, gas connection, direct venting, electrical supply, and condensate routing.
• Source images show the heater and installation examples. Gas piping, electrical connections, tools, venting materials, and separately sold accessories are not included unless listed.