Tankless Water Heater Non-Condensing Indoor 140,000 BTU Propane

Tankless Water Heater Non-Condensing Indoor 140,000 BTU Propane

Model ATI-110-P

Tankless Water Heater Non-Condensing Indoor 140,000 BTU ATI-110-P is rated 4.6667 out of 5 by 3.
Rated 5 out of 5 by from Does exactly what it's supposed to do. I had the original Takagi for 13 years and it worked great. I finally replaced it a month ago and so far, it's working great!
Date published: 2014-11-29
Rated 5 out of 5 by from Hot water out the wazoo Have a larger unit in the other part of the house. Constant use for 2 years, no problem, but due to the length of run decided to put a smaller unit in just for the kitchen remodel. Looking forward to many years of hot.
Date published: 2014-08-20
Rated 4 out of 5 by from New House New Hot Water Heater I made settlement on my new home in April. The home came with this new type of hot water heater. It is small, takes up very little space in my utility room. It does however take a bit of time for the water to get as hot as I like quickly.
Date published: 2014-06-11
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The 110 Series is great for apartments, one bath homes in cold climates, condos and summer cabins. Remote control included as a standard feature. Provides a variety of installation options: indoor, outdoor, and direct vent.

The ATI-110-P tankless water heater uses up to 140,000 BTUs of propane to deliver a max flow rate of 6.6 GPM. It utilizes non-condensing technology to achieve an Energy Factor of 0.83, and is ENERGY STAR® qualified. This model meets Low NOx emission requirements, and comes with a 15-year limited warranty.

Where to Buy

Where to Buy

Woodbridge, NJ 07095

Location #1

Jersey Pipeline Plumbing & Heating Inc.

Freehold, NJ

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Location #2

Tuga Plumbing

Union, NJ

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Location #3

Authorized Heating

Brooklyn, NY

More Info >>
View All List My Company Here

Product Features & Options

Primary Heat Exchanger

The primary heat exchanger is constructed of commercial-grade HRS35 copper, which is stronger than standard copper and more resilient against erosion.

Safety Features

Includes freeze, overheat, surge protection and troubleshooting diagnostic codes.

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.

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.

How it Works

The comprehensive line of A. O. Smith tankless water heaters provide hot water on-demand. When a hot water tap is opened, a flow sensor sends an activation signal to the onboard computer. The computer then activates the combustion system. Heat is transferred to the water as it flows through the heat exchanger and an outgoing water temperature sensor keeps water temperature to within +/- 1F of set point. Once the hot water tap is closed, the heater automatically turns off.




limited warranty


energy factor

CSA International Low Lead Content Certification in compliance with U.S. and Canadian safety standards on gas components
AHRI Air-Conditioning, Heating and Refrigeration Institute
CSA International Design Certification The CSA Blue Star indicates the product is certified to applicable U.S. standards for appliances using gas or other petroleum fuel
CSA International Certification in compliance with U.S. and Canadian for gas appliances and other liquid petroleum, LP, propane products

Product Specifications

Tech Specs
Emissions: Low NOx
Maximum BTUs: 140,000
Minimum BTUs: 19,500
Thermal Efficiency: 83%
Limited Heat Exchanger Warranty: 15 Years
Limited Parts Warranty: 5 Years
Water Connection Location: Bottom
Water Connection Size: 3/4"
Heat Exchanger: Copper
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: 7 3/4"
Product Weight: 33lbs/15kg
Shipping Weight: 38lbs
Vent Type: Direct Vent
Vent Length: 50 feet at 4 diameter


Rebate and incentive programs provide cash-back to consumers for the purchase of appliances that meet certain energy efficiency standards. Often, these standards are tied to the ENERGY STAR® program.

Cash for Appliances is designed to encourage the purchase of energy efficient appliances. Consumers who purchase ENERGY STAR® or CEE qualified appliances can receive cash rebates. Most states are offering rebates in the $50 to $250 range.


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Need More Hot Water?

There's no reason to run out of hot water. If you're not sure that the ATI-110-P provides enough hot water for your needs, consider these:

Tankless Water Heater Non-Condensing Indoor 240,000 BTU Natural Gas

  • 10 Year Limited Warranty
  • 240,000 BTU

Vertex™ 100 Power Direct Vent 50-Gallon Gas Water Heater

  • 6 Year Limited Warranty
  • 100,000 BTU

Vertex™ Power Vent 50-Gallon Gas Water Heater

  • 6 Year Limited Warranty
  • 76,000 BTU