160,000 BTU Commercial Tankless Water Heater

The CX160iN is Rinnai's commercial, natural-gas tankless water heater, built for restaurants, hotels, and multi-family properties with industry-leading thermal efficiency in a compact combustion design meant for easier installation and serviceability. It is listed for indoor location, with indoor-to-outdoor conversion available using the separately sold Versa-Vent outdoor vent cap.

It is rated for a maximum input of 160,000 BTU and a maximum flow of 9, with a thermal efficiency of 97% and an energy factor of 0.97, operating between 98°F and 140°F. The unit runs on 120-volt power and draws 73 watts.

Installation is wall-mounted and requires professional service, with venting rated up to 75 feet. Rinnai's Smart Sense gas control system and the Rinnai Central app support quick setup and registration over Bluetooth, and recirculation is field convertible with an internal pump kit. The unit carries Title 24 and Energy Star certification (including Energy Star Canada). 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 unit's heat exchanger for 15 years (residential) or 8 years (commercial), or 12,000 hours, with 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

  Plan wall-mounted installation around service access, combustion air, water and gas connections, condensate routing, and required clearances. The source shows indoor placement; a qualified professional must verify the site and local code. The product page does not publish a complete clearance schedule.

• Venting Requirements

  Direct venting is required. The source lists 2-inch venting up to 75 feet, and describes an outdoor conversion using a compatible vent cap sold separately. Confirm the approved vent material, route, termination, clearances, and accessory requirements in the installation documentation.

• Natural Gas Supply

  This listing is the natural-gas configuration, not a selectable fuel-type listing. The 160,000 BTU input makes gas-line supply sizing an installer decision. A qualified professional should verify natural-gas pressure, line size, connections, and local code before ordering installation materials.

• Flow and Temperature Rise

  The source lists flow up to 9 GPM, a 0.26 GPM minimum flow rate, and 140°F maximum temperature. Delivered flow depends on temperature rise, incoming water conditions, and fixture demand. Use the installation documentation to size performance for the actual hot-water load.

• Controls and Recirculation

  Digital controls and a digital display support temperature adjustment. Bluetooth app connectivity is described for setup and registration, while recirculation is field convertible with an internal pump kit. Confirm the required pump accessory, controls, and loop layout before planning recirculation.

• Efficiency and Power

  The source describes a compact condensing combustion design, 97% thermal efficiency, 0.97 energy factor, and Energy Star certification. The unit uses 120-volt power. Confirm electrical service, condensate handling, and the requirements for a condensing appliance with the qualified installer.

• Flushing and Maintenance

  Quick Flush is described as simplified system flushing, supporting serviceability over the life of the heater. Water chemistry and use conditions affect maintenance needs. Follow the installation documentation for flushing, descaling, cleaning, inspection, and service intervals, and keep service records.

• Warranty Terms

  The source lists a 15-year limited warranty length, while its detailed commercial terms state 8 years or 12,000 hours on the heat exchanger, 5 years on parts, and 1 year on labor. Verify the current written commercial warranty and registration terms before installation.

• What Ships

  The source identifies one tankless water heater and does not publish a complete box-contents list. The compatible outdoor vent cap is sold separately. Confirm included parts, venting, pump-kit needs, and other installation materials before scheduling the professional installation.

Good to know

• Natural-gas CX160iN configuration; one fuel-specific variant.
• Direct vent required; source lists 2-inch venting up to 75 feet.
• Wall-mounted indoor tankless installation; verify clearances and service access.
• Professional installation is required for gas, venting, electrical, water, and condensate connections.
• Water heater only. Installation materials, venting components, controls, and other items shown or required are not included unless explicitly stated.