Ao Smith 100123492 Tankless Water Heater 120000 Btu/h

Product Description

The AO SMITH 100123492 is a condensing natural gas tankless water heater designed for indoor installation in commercial and residential applications. Rated at 120,000 BTU/h input with a flow rate of 6.6 gallons per minute, this unit delivers continuous hot water on demand without the standby losses associated with storage-tank systems. The ATI-140H model operates with a direct or power vent configuration using 3-inch or 4-inch vent pipe and carries a reported efficiency rating of 0.90, placing it in the condensing category. Plumbers and mechanical contractors are the primary trades that size, install, and commission this equipment.

This unit is suited for indoor installations where a dedicated vent termination can be routed to the exterior. The condensing design recovers latent heat from flue gases, making it appropriate for applications requiring high efficiency in both light commercial settings such as small restaurants, offices, or multi-unit residential buildings and in single-family residential new construction or retrofit projects. The 6.6 GPM flow rate supports moderate simultaneous fixture demand in typical commercial or residential scenarios.

Key Features

• 120,000 BTU/h input rating for high-demand continuous hot water delivery
• Condensing design with 0.90 efficiency rating reduces operating costs vs. non-condensing units
• 6.6 GPM flow rate supports simultaneous fixture demand in residential and light commercial use
• Natural gas fuel with direct or power vent configuration
• 3-inch or 4-inch vent pipe compatibility provides installation flexibility
• Rated for indoor installation in both commercial and residential applications

Compatibility

Designed as an OEM-style replacement or new-installation unit for indoor natural gas condensing tankless water heater applications in residential and light commercial systems.

Installation Notes

Installation must be performed by a licensed plumber or mechanical contractor in accordance with local plumbing codes and the manufacturer instructions. Shut off the gas supply and cold water supply before making any connections. Vent piping must be installed per the applicable fuel gas code, typically IFGC or NFPA 54, using properly rated materials for condensing flue gas temperatures and acidic condensate. Condensate drainage must be piped to an approved drain per local code requirements.

Technical Specifications

• Fuel Type: Natural Gas
• Input Rating: 120,000 BTU/h
• Flow Rate: 6.6 gallons per minute
• Efficiency Rating: 0.90
• Vent Type: Direct Vent or Power Vent
• Vent Size: 3 inches or 4 inches
• Installation Location: Indoor
• Application: Commercial and Residential
• Design: Condensing

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100123492