A.O. Smith ATHR-180X3
A.O. Smith ATHR-180X3
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A.O. Smith Adapt™ with X3® Scale Prevention - Residential 180,000 BTU - Natural Gas Tankless Water Heater - Indoor/Outdoor

Model:

ATHR-180X3

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$2,006.39
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*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
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A.O. Smith Adapt™ with X3® Scale Prevention - Residential 180,000 BTU - Natural Gas Tankless Water Heater - Indoor/Outdoor
A.O. Smith Adapt™ with X3® Scale Prevention - Residential 180,000 BTU - Natural Gas Tankless Water Heater - Indoor/Outdoor
Model: ATHR-180X3
$2,006.39
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Recommended Accessories

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Required Accessories 9
These accessories are required to properly setup/install this product.
Optional Accessories 10

Features

Fuel

Natural Gas

Location

Indoor/Outdoor

# of Showers

2.8

UEF

0.95

Energy Star Certification

Yes

    A.O. Smith continues to lead the way in residential water heating with close to 70 years of innovative hot water solutions. The A.O. Smith Adapt™ Tankless Water Heater delivers on-demand performance along with installation versatility. With a heavy-duty design, the patented stainless steel heat exchanger in the A.O. Smith Adapt™ Tankless Water Heater will be dependable for years to come. With installation features like flexible venting, the ability to convert from natural gas to liquid propane in the field and approval for manufactured home installations, the A.O. Smith Adapt™ can be installed in almost any residential setting. Built-in controls and an integrated recirculation pump give you the convenience to set and review recirculation schedules and never wait long for hot water, even on the farther fixtures. Integrated with A.O. Smith's patented X3® technology, the A.O. Smith Adapt™ maintains like-new performance for longer.
  • X3® Scale Prevention Technology
  • Maintain "like-new" performance of your water heater with A.O. Smith's patented X3® Scale Prevention technology. With no annual descaling required, X3® technology extends the life of the water heater up to three times longer.
  • Flexible Installation
  • Simplify installation of your new tankless water heater with the A.O. Smith Adaptâ„¢. You can use PVC, CPVC, Polypropylene or ABS pipe (solid core only) for installation.
  • High Efficiency Condensing Technology
  • The ATHR-180X3 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 ATHR-180X3 is designed to qualify for the most stringent standards. These standards coincide with SCAQMD rules and other air quality management districts.
  • Heavy Duty Heat Exchanger
  • Made from stainless steel with only two weld points, the reliable heat exchanger in the A.O. Smith Adaptâ„¢ is more resilient to scale buildup and corrosion, extending the life of the water heater.
  • Recirculation Pump
  • With an integrated recirculation pump, the A.O. Smith Adaptâ„¢ prevents you from having to wait for hot water, even at the farthest fixture.
  • Built-In Controls
  • Set up to two recirculation schedules with the built-in controls as well as the ability to check status and error codes, right on the built-in display.
California residents see
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
For more information go to: www.p65Warnings.ca.gov

Specifications

ATHR-180X3
specs product image PID-154115
General Information
Type
Tankless Water Heater
Product Line
Adapt
Product Category
Water Heater - Tankless
Medium Learn More
Medium
Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
Hot Water
Heat Exchanger Material
Stainless Steel
Fuel Type Learn More
Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Natural Gas
Combustion Type Learn More
Combustion Type
Condensing appliances use leftover thermal energy from combustion gases to heat water in a secondary heat exchanger, resulting in higher efficiency and lower exhaust temperature.
Condensing
Vent Type Learn More
Vent Type
Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
Direct Vent
Venting Category Learn More
Venting Category
Venting Category describes what type of flue material can be used in water heater installations. Category III: Stainless Steel, Category IV: ABS, PVC, CPVC, PolyPro, Stainless Steel
IV
Storage Type
Tankless
Application
Residential
Installation Location
Indoor/Outdoor
Maximum Altitude
10100 Feet
Includes Pump
Yes
Gas Conversion Kit
Included
Performance
Maximum Input Capacity Learn More
Maximum Input Capacity
The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
180000 BTU
Minimum Input Capacity
9000 BTU
Flow Rate at 40F Temperature Rise Learn More
Flow Rate at 40F Temperature Rise
Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
8.5 GPM
Flow Rate at 50F Temperature Rise Learn More
Flow Rate at 50F Temperature Rise
Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
6.8 GPM
Flow Rate at 60F Temperature Rise Learn More
Flow Rate at 60F Temperature Rise
Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
5.8 GPM
Flow Rate at 70F Temperature Rise Learn More
Flow Rate at 70F Temperature Rise
Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
4.9 GPM
Uniform Energy Factor Learn More
Uniform Energy Factor
Uniform Energy Factor (UEF) is a measurement of water heater energy efficiency. The higher the energy factor, the more efficient the water heater.
0.95
Flow Rate at 77F Temperature Rise
4.4 GPM
Ultra Low NOx Emissions Learn More
Ultra Low NOx Emissions
NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx. Learn More
Yes
Electrical Data
Phase
1
Frequency
60 Hz
Dimensions
Primary Vent Pipe Diameter
2 Inches
Gas Connection Size
1/2 Inch
Cold Water Inlet
3/4 Inch
Hot Water Outlet
3/4 Inch
Product Height
44 29/48 Inches
Product Width
16 1/2 Inches
Product Depth
16 5/48 Inches
Product Weight
104 Pounds
Shipping Weight
125 Pounds
Certifications
Energy Star Listed
Yes
CSA Listed
Yes
AHRI Certified
Yes
ANSI Certified
Yes
AHRI Reference Number
213881197
Warranty Information
Parts Warranty Learn More
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
Heat Exchanger Warranty
15 Years

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Product Q&A

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How-To Articles

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A.O. Smith Adapt™ with X3® Scale Prevention - Residential 180,000 BTU - Natural Gas Tankless Water Heater - Indoor/Outdoor
A.O. Smith ATHR-180X3
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