Tankless Water Heater Non-Condensing Indoor 380,000 BTU Natural Gas

The 910 Series is a fully modulating, gas-fired, tankless water heaters. It can be installed either outdoors, indoors, or direct vented. Capable of supplying domestic hot water systems and/or combined domestic and heating applications (local codes dictate proper compliance). Multiple units can be combined in a system of water heaters to provide for larger applications such as hotels, large restaurants and apartment complexes..

The ATIO-910-N tankless water heater uses up to 380,000 BTUs of natural gas to deliver a max flow rate of 14.5 GPM. It utilizes non-condensing technology to achieve 80% thermal efficiency. This model meets Low NOx emission requirements, and comes with a 15-year limited warranty.


  • Dual Heat Exchanger
  • The primary heat exchanger is constructed of commercial-grade copper, which is stronger than standard copper and more resilient against erosion. Condensing models feature 316L stainless steel secondary heat exchanger, providing additional protection against corrosion.
  • Safety Features
  • Includes freeze, overheat, surge protection and troubleshooting diagnostic codes.
  • Endless Hot Water
  • The comprehensive line of A. O. Smith tankless water heaters are an excellent whole-home water heating solution that supply endless hot water.
  • Tech Specs
  • Emissions: Low NOx
  • Maximum BTUs: 380,000
  • Minimum BTUs: 15,000
  • Thermal Efficiency: 80%
  • Limited Heat Exchanger Warranty: 15 Years
  • Limited Parts Warranty: 5 Years
  • Water Connection Location: Bottom
  • Water Connection Size: 3/4"
  • Heat Exchanger: Commercial Grade Copper
  • Secondary Heat Exchanger: Stainless Steel
  • Voltage: 120
  • Remote Control: Yes
  • Technology: Non-Condensing
  • Dimensions & Venting
  • Type: Space Saving
  • Height: 24 7/8"
  • Width: 25 1/4"
  • Depth: 12 1/4"
  • Product Weight: 112lbs/51kg
  • Shipping Weight: 113lbs
  • Vent Type: Power Vent