Rinnai CX199I Condensing Tankless Water Heater 199K Btu

Product Description

The RINNAI CX199I is a condensing tankless water heater rated at 199,000 BTU/h with a 97 percent thermal efficiency rating. It operates on a continuous on-demand flow model, heating water only when there is demand rather than maintaining a stored tank. The high thermal efficiency rating places it in the condensing category, meaning it recovers latent heat from exhaust gases to maximize fuel utilization. This unit is designed for indoor installation and is typically specified and installed by licensed plumbers or mechanical contractors on residential or light commercial projects requiring high-output hot water supply.

The CX199I is suited for applications where simultaneous hot water demand is high, such as multi-bathroom residential homes, small commercial facilities, or installations requiring a high-capacity single unit. Its 199,000 BTU/h input allows it to serve multiple fixtures concurrently when properly sized and installed. Indoor mounting configurations make it appropriate for utility rooms, mechanical closets, and dedicated equipment spaces with proper venting provisions.

Key Features

• 199,000 BTU/h input capacity supports high simultaneous hot water demand
• 97 percent thermal efficiency rating qualifies this unit in the condensing heater category
• On-demand tankless operation eliminates standby heat loss associated with storage tank systems
• Indoor installation design requires appropriate exhaust venting per local mechanical codes
• Condensing operation recovers latent heat from flue gases to improve fuel utilization

Compatibility

Designed as an OEM indoor condensing tankless water heater; consult the manufacturer installation manual for compatible venting materials, gas supply requirements, and approved accessory connections specific to the CX199I.

Installation Notes

Installation must be performed by a licensed plumber or mechanical contractor in accordance with local plumbing and mechanical codes, IFGC requirements, and the manufacturer installation instructions. Shut off the gas supply and cold water inlet before beginning any connections or service work. Proper condensate drainage and approved venting materials rated for condensing appliances are required. Do not operate the unit without verifying gas type, supply pressure, and venting configuration match the unit specifications.

Technical Specifications

• Input Capacity: 199,000 BTU/h
• Thermal Efficiency: 97 percent
• Installation Type: Indoor
• Heater Type: Condensing Tankless

Standard Information

• Brand: RINNAI
• Manufacturer Part Number: CX199I