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Product Details
 

The 310U Series is great for two bath homes in cold climates. The 310U features a max flow rate of 8.0 gallons per minute providing enough hot water to run three showers at the same time. Remote control included as a standard feature. Provides a variety of installation options: indoor, outdoor, and direct vent. Complies with Ultra-Low NOx regulations and meets energy efficiency requirements of ASHRAE 90.1b-1992.

The ATI-310U-N tankless water heater uses up to 190,000 BTUs of natural gas to deliver a max flow rate of 6.6 GPM. It utilizes non-condensing technology to achieve an Energy Factor of 0.82. This model meets Ultra-Low NOx emission requirements, and comes with a 15-year limited warranty.

How it Works

The comprehensive line of A. O. Smith tankless water heaters provide hot water on-demand.

• The model activates when a fixture is opened 
• Burners heat the water as it passes through 
• A flow sensor recognizes when the water has stopped and shuts the burners off

Product Specifications


Tech Specs
Emissions: Ultra-Low NOx
Maximum BTUs: 190,000
Minimum BTUs: 15,000
Limited Heat Exchanger Warranty: 15 Years
Limited Parts Warranty: 5 Years
Water Connection Location: Bottom
Water Connection Size: 3/4"
Heat Exchanger: HRS35 Copper Alloy
Secondary Heat Exchanger: Stainless Steel
Voltage: 120
Energy Factor: 0.82
Remote Control: Yes
Technology: Non-Condensing


Dimensions & Venting
Type: Space Saving
Height: 20 1/4"
Width: 13 3/4"
Depth: 9 1/2"
Product Weight: 37lbs/17kg
Shipping Weight: 40lbs
Vent Type: Power Direct Vent
Vent Length: 50 feet at 4 diameter



Product Features & Options

Dual Heat Exchanger

The primary heat exchanger is constructed of commercial-grade HRS35 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.

Space Savings

A. O. Smith tankless water heaters take up much less space that your conventional tank-style water heater. With no tank to steal valuable storage space, our wall-mount design allows for additional storage and flexibility.


 

 

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.