A.O. Smith Tankless Water Heater – 10.5 GPM – Model ATM-160X3

This A.O. Smith tankless water heater, model ATM-160X3, has a heating capacity of 160,000 BTU with a maximum flow rate of 10.5 Gallons Per Minute (GPM). It can provide hot water for a home with 2–3 occupants in regular conditions. This tankless water heater uses natural gas as its fuel source and operates with a direct vent exhaust system. This type of venting sends combustion gases directly outside, improving safety and overall efficiency. As a tankless system, it requires less space than traditional tank water heaters and is designed to be mounted on the wall.

A.O. Smith is one of the leading brands in the water heater market, producing a wide range of reliable residential and commercial units. In terms of price, the ATM-160X3 is positioned in the mid-range category, making it a great choice for customers looking for dependable performance, energy savings, and long-term comfort without entering the high-end price bracket.

The average lifespan of a tankless water heater is typically between 15 and 20 years. Factors such as installation quality, maintenance frequency, and local water hardness can influence longevity. Regular maintenance—including descaling and flushing the system—helps reduce mineral buildup and maintains peak performance. This model has a Uniform Energy Factor (UEF) of 0.95, which qualifies as High-Efficiency. Although slightly lower than super high-efficiency models, it still offers excellent energy savings and reduced operating costs.

This model includes a 15-year warranty on the heat exchanger and a 5-year warranty on parts. When you purchase this product from HVAC Near Me, you gain access to flexible financing options ranging from 1 to 20 years. You will also receive a free 1-year labor warranty, with the option to extend protection to 5 or 10 years for extra peace of mind.

Documents

• ATM-X3 Spec
• ATM-X3 Manual