A. O. Smith Tankless Water Heater Gas - On Demand Hot Water - Indoor - 8 GPM - Non-Condensing Natural Gas with X3 Scale Prevention Technology - 190,000 BTU ProLine XE Concentric Vent - ATI-310CX3

Enjoy Continuous Flow: This heater allows a flow rate up to 8.0 GPM while X3 Scale Prevention Technology prevents scale buildup and maintains like-new performance longer. No annual descaling or isolation valves required.

Lower Your Energy Cost: Using our high-efficiency tankless water heater with up to .81 Uniform Energy Factor (UEF). Includes integrated temperature controls and advanced diagnostics for easy operation.

Stable Water Temperature: The commercial-grade copper heat exchanger in the AO Smith tankless water heater provides 25x better heat transfer compared to steel. 15-year limited warranty on heat exchanger in residential applications.

Safe For Your Home: This tankless water heater comes with exhaust & water temperature safety control, overheat cut-off fuse and air-fuel ratio (AFR) sensor. Professional installation recommended. Contact A. O. Smith support at (800) 527-1953.

Space Efficient Design: Wall-mount saves valuable space and allows for additional storage and flexibility. Direct vent APNC35 concentric vent system, Vertical or Horizontal Vent Termination Installation. Convertible from natural gas to propane with included kit.

𝗔. 𝗢. 𝗦𝗺𝗶𝘁𝗵 𝗧𝗮𝗻𝗸𝗹𝗲𝘀𝘀 𝗪𝗮𝘁𝗲𝗿 𝗛𝗲𝗮𝘁𝗲𝗿 𝟭𝟵𝟬,𝟬𝟬𝟬 𝗕𝗧 𝗣𝗿𝗼𝗟𝗶𝗻𝗲 𝗫𝗘 𝗖𝗼𝗻𝗰𝗲𝗻𝘁𝗿𝗶𝗰 𝗩𝗲𝗻𝘁 𝗜𝗻𝗱𝗼𝗼𝗿 𝗡𝗼𝗻-𝗖𝗼𝗻𝗱𝗲𝗻𝘀𝗶𝗻𝗴 𝗡𝗮𝘁𝘂𝗿𝗮𝗹 𝗚𝗮𝘀 𝘄𝗶𝘁𝗵 𝗫𝟯 𝗦𝗰𝗮𝗹𝗲 𝗣𝗿𝗲𝘃𝗲𝗻𝘁𝗶𝗼𝗻 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝘆 𝗘𝗻𝗷𝗼𝘆 𝗖𝗼𝗻𝘁𝗶𝗻𝘂𝗼𝘂𝘀 𝗙𝗹𝗼𝘄: This heater allows a flow rate up to 8.0 GPM while X3 Scale Prevention Technology prevents scale buildup and maintains like-new performance longer. No annual descaling or isolation valves required. 𝗟𝗼𝘄𝗲𝗿 𝗬𝗼𝘂𝗿 𝗘𝗻𝗲𝗿𝗴𝘆 𝗖𝗼𝘀𝘁: Using our high-efficiency tankless water heater with up to .81 Uniform Energy Factor (UEF). Includes integrated temperature controls and advanced diagnostics for easy operation. 𝗦𝘁𝗮𝗯𝗹𝗲 𝘄𝗮𝘁𝗲𝗿 𝗧𝗲𝗺𝗽𝗲𝗿𝗮𝘁𝘂𝗿𝗲𝘀: The commercial-grade copper heat exchanger in the AO Smith tankless water heater provides 25x better heat transfer compared to steel. 15-year limited warranty on heat exchanger in residential applications. 𝗦𝗮𝗳𝗲 𝗙𝗼𝗿 𝗬𝗼𝘂𝗿 𝗛𝗼𝗺𝗲: This tankless water heater comes with exhaust & water temperature safety control, overheat cut-off fuse and air-fuel ratio (AFR) sensor. Professional installation recommended. Contact A. O. Smith support at (800) 527-1953. 𝗦𝗽𝗮𝗰𝗲 𝗘𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝘁 𝗗𝗲𝘀𝗶𝗴𝗻: Wall-mount design saves valuable space and allows for additional storage and flexibility. Direct vent APNC35 concentric vent system, Vertical or Horizontal Vent Termination Installation. Convertible from natural gas to propane with included kit.