AO Smith 6.6 GPM 120,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater with Integrated Controls and Ultra-Low NOx
Model: ATI-140H-N|Item: bci3378893
Details
A.O. Smith continues to lead the way in residential water heating with close to 70 years of innovative hot water solutions. The ATI-140H-N is A.O. Smith's high efficiency, Ultra-Low NOx indoor model, it keeps emissions low by featuring the latest in water heating technology. Switching on when a hot water tap is opened, a built in temperature sensor helps to maintain hot water within a one degree set point during use, and the system automatically shuts off when the tap is closed saving you energy. The ATI-H line utilizes condensing technology to provide higher Uniform Energy Factors and reduce your fuel costs. An on board controller gives you simple and complete control over your water heater.
Product Information:
- High Efficiency Condensing Technology: The ATI-140H-N features the latest in water heating condensing technology. This means that the unit can deliver some of the highest efficiency standards on the market, keeping dollars in your pocket.
- Ultra Low-NOx Emissions: The ATI-140H-N is designed to qualify for the most stringent Low-NOx standards. These standards coincide with SCAQMD rules and other air quality management districts.
- Heavy Duty Heat Exchanger: The primary heat exchanger is built out of copper, offering better heat transfer than stainless steel and designed to be more resilient against corrosion. A.O. Smith water heaters are built to last and save you money in the process.
- Multiple Safety Features: ATI models come with a long list of safety features standard. These include: built in freeze protection, manual reset hi limit, an overheat cutoff fuse, inlet and outlet thermistors to monitor temperatures, and a built-in flame sensor.
- Space Saving Design: A.O. Smith tankless heaters take up less space than their conventional counterparts. The convenient wall mount design means they can fit in nearly any home layout and offer additional flexibility.
Features:
- Never run out of water again with a steady 5.4 GPM flow rate
- This product is Energy Star certified with a Uniform Energy Factor of 0.9
- Covered under a 15-year heat exchanger warranty
- Covered under a 5 year parts manufacturer warranty
Specifications:
- Width: 13-7/8"
- Height: 22-7/8"
- Depth: 10-13/16"
- Fuel Type: Natural Gas
- Gas Connection: 1/2"
- Connection Size: 3/4"
- Voltage: 120V
Dimensions and Measurements
Activation GPM | 0.5 |
Depth | 10.8125 in. |
Duct Size | 4" Round |
Gas Connection | 1/2" |
Height | 22.875 in. |
Maximum Flow Rate | 5.4 GPM |
Maximum Gas Input | 120000 |
Minimum Flow Rate | 2.9 GPM |
Minimum Gas Input | 15000 |
Product Weight | 44 lbs. |
Uniform Energy Factor (UEF) | 0.90 |
Vent Maximum Run | 1200, 840 in. |
Water Connection | 3/4" |
Water Pressure (Max) | 150 PSI |
Water Pressure (Min) | 15 PSI |
Width | 13.875 in. |
Dimensions and Measurements
Activation GPM | 0.5 |
Depth | 10.8125 in. |
Duct Size | 4" Round |
Gas Connection | 1/2" |
Height | 22.875 in. |
Maximum Flow Rate | 5.4 GPM |
Maximum Gas Input | 120000 |
Minimum Flow Rate | 2.9 GPM |
Minimum Gas Input | 15000 |
Product Weight | 44 lbs. |
Uniform Energy Factor (UEF) | 0.90 |
Vent Maximum Run | 1200, 840 in. |
Water Connection | 3/4" |
Water Pressure (Max) | 150 PSI |
Water Pressure (Min) | 15 PSI |
Width | 13.875 in. |
Included Components
Includes Isolation Valve Kit | No |
Includes Remote | Yes |
Included Components
Includes Isolation Valve Kit | No |
Includes Remote | Yes |
Characteristics and Features
Direct Vent | Yes |
Heating Technology | Condensing |
Indoor Installation | Yes |
Vent Type | Direct Vent |
Water Connection Location | Bottom |
Water Connection Type | NPT |
Characteristics and Features
Direct Vent | Yes |
Heating Technology | Condensing |
Indoor Installation | Yes |
Vent Type | Direct Vent |
Water Connection Location | Bottom |
Water Connection Type | NPT |
Manufacturer Technology
Recirculation | No |
Manufacturer Technology
Recirculation | No |
Electrical and Operational Information
Altitude Certification | 10100 ft. |
Condensing | Yes |
Default Temperature | 120 °F |
Energy Factor | 0.93 |
Frequency | 60 Hertz |
Fuel Type | Natural Gas |
Ignition Type | Electric |
Max BTU Input | 120000 |
Power Source | Plug-In |
Temperature (Max) | 140 °F |
Temperature (Min) | 100 °F |
Voltage | 120 |
Electrical and Operational Information
Altitude Certification | 10100 ft. |
Condensing | Yes |
Default Temperature | 120 °F |
Energy Factor | 0.93 |
Frequency | 60 Hertz |
Fuel Type | Natural Gas |
Ignition Type | Electric |
Max BTU Input | 120000 |
Power Source | Plug-In |
Temperature (Max) | 140 °F |
Temperature (Min) | 100 °F |
Voltage | 120 |
Warranty and Product Information
ANSI Certification | Z21.10.3 |
Certifications | AHRI, ANSI, CSA |
Collection | ProLine |
Country Of Origin | India |
Energy Star | Yes |
Heat Exchanger Warranty | 15-Years |
Indoor Approved | Yes |
Low Lead Compliant | Yes |
Manufacturer Warranty | 5 Year Parts |
Outdoor Approved | No |
Product Variation | Whole House Water Heater |
SCAQMD Compliant | Yes |
Title 20 Compliant | Yes |
Uniform Energy Factor | 0.9 |
Warranty and Product Information
ANSI Certification | Z21.10.3 |
Certifications | AHRI, ANSI, CSA |
Collection | ProLine |
Country Of Origin | India |
Energy Star | Yes |
Heat Exchanger Warranty | 15-Years |
Indoor Approved | Yes |
Low Lead Compliant | Yes |
Manufacturer Warranty | 5 Year Parts |
Outdoor Approved | No |
Product Variation | Whole House Water Heater |
SCAQMD Compliant | Yes |
Title 20 Compliant | Yes |
Uniform Energy Factor | 0.9 |

