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A.O. Smith ATI-240H - Residential 160,000 BTU - Natural Gas Tankless Water Heater - Indoor
Model:
ATI-240H-N
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Features
Fuel
Natural Gas
Location
Indoor
# of Showers
2.4
UEF
0.94
Energy Star Certification
Yes
A.O. Smith ATI-240H - Residential 160,000 BTU - Natural Gas Tankless Water Heater - Indoor
Product Video Disclaimer: "PED is not responsible for any variances from the product in this video and the item you purchase. Please review all product specs prior to purchase."
- High Efficiency Condensing Technology
- The ATI-240H-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-240H-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.
A.O. Smith continues to lead the way in residential water heating with close to 70 years of innovative hot water solutions. The ATI-240H-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.
California residents see
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm..
For more information go to: www.p65Warnings.ca.gov
Specifications
ATI-240H-N
Overview
Product Category
Water Heater - Tankless
UPC
671657141899
General Information
Type
Tankless Water Heater
Product Line
ProLine
Product Category
Water Heater - Tankless
Medium
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
Copper/Stainless
Fuel Type
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
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
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
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
Mount Type
Wall
Installation Location
Indoor
Maximum Altitude
10100 Feet
Includes Pump
No
Gas Conversion Kit
Not Available
Performance
Maximum Input Capacity
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.
160000 BTU
Minimum Input Capacity
15000 BTU
Flow Rate at 40F Temperature Rise
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
6.7 GPM
Flow Rate at 50F Temperature Rise
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
6.1 GPM
Flow Rate at 60F Temperature Rise
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
5.0 GPM
Flow Rate at 70F Temperature Rise
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
4.3 GPM
Uniform Energy Factor
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.
0.94
Flow Rate at 77F Temperature Rise
4.0 GPM
Ultra Low NOx Emissions
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
Voltage
120 Volts
Phase
1
Frequency
60 Hz
Dimensions
Primary Vent Pipe Diameter
4 Inches
Gas Connection Size
3/4 Inch
Cold Water Inlet
3/4 Inch
Hot Water Outlet
3/4 Inch
Product Height
23 5/8 Inches
Product Width
17 3/4 Inches
Product Depth
11 1/4 Inches
Product Weight
58 Pounds
Certifications
CSA Listed
Yes
Energy Star Listed
Yes
AHRI Certified
Yes
ANSI Certified
Yes
UPC Listed
Yes
AHRI Reference Number
5526876
Warranty Information
Parts Warranty
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
Reviews
(11)
A.O. Smith ATI-240H-N Reviews & Ratings
Customer Rating
4.91
(11 Ratings)
91% recommend this product
5
(10)
(10)4(1)
(1)3(0)
(0)2(0)
(0)1(0)
(0)
Great Unit
By Richard F
Hanover, Pennsylvania
Purchased 05/15/2020 |
Review Posted 06/25/2020
works well 10x better than the one I bought 13 years ago
Richard F Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
5/5
Pros:
Easy To Use, Quiet, Exceeded Expectations, Id Buy It Again
Works great
By Patrick B
Remer, Minnesota
Purchased 10/26/2018 |
Review Posted 11/27/2018
Replacing an older tankless. Works much better than competitor unit. No cold water sandwich to speak of. Quick starting of flame. Should have switch a long time ago. Much quieter as well. Wish it had more than 2 re-circulation settings.
Patrick B Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
4/5
Hot water slow to come.
By Richard J
Lockport, New York
Purchased 05/09/2018 |
Review Posted 06/23/2018
I am not real happy with how long it takes hot water to reach even the closest faucet.Maybe all makes are like this but it doesn't make it any easier to have to wait 10 to 15 seconds to get hot water.
Richard J Does Not Recommend This
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Expert Response
While it may seem like a long time it’s approximately 5 seconds longer than getting water from a standard tank water heater. There are circulating pumps that can be installed with timers or using an Alexa plug to turn it on and off that will take away that waiting time.
Ken D.
eComfort Product Expert
Rating Breakdown
4/5
4/5
4/5
4/5
As Good as Advertised
By Chris M.
West Virginia
Purchased 04/13/2017 |
Review Posted 12/26/2017
I had zero problems with the easy installation.The unit has performed perfectly since the intial start up.The price is easily offset by the money saved on energy cost.So, far it has met all expectations.
Chris M. Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
5/5
This is best product ever
By Tommy B.
Dunbar, West Virginia
Purchased 11/15/2017 |
Review Posted 12/06/2017
The product is great and I would recommend this product to anyone
Tommy B. Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
5/5
Love It
By Dion M.
Portola Valley, California
Purchased 08/28/2017 |
Review Posted 09/19/2017
I was moving my water heater and installing tankless to get longer life appliance and endless hot water. I wanted recirculating pump and high gpm tankless. This was easy to install with solid core pvc venting (get the concentric vent) and the valve kit. Just make sure you have large enough gas line--max 30 feet run 3/4 inch with no other appliances off of it. I wound up installing 1-1/4 gas line in my setup.
Dion M. Recommends This
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Rating Breakdown
5/5
5/5
5/5
5/5
Works Great
By Tom B.
Moose Lake, Minnesota
Purchased 06/11/2017 |
Review Posted 07/03/2017
The installation went well and the unit is very quiet - working great.
Tom B. Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
4/5
Pros:
Easy To Use, Quiet, Price
It's a really great product
By James M.
Phillipsburg, Ohio
Purchased 02/12/2017 |
Review Posted 03/07/2017
Well it's been a great purchase for me so far. I read a bunch of reviews, talked to a friend of mine that's a plumber who recommended the AO Smith brand, so I bought it and installed it myself. I wish it had better instructions for people that wanna do it themselves but overall it's been installed for a couple of weeks it's been doing great
James M. Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
5/5
Best product on the market
By Michael H.
Omaha, Nebraska
Purchased 01/07/2017 |
Review Posted 02/21/2017
Did lots of research before purchase, found this unit is very quiet, gets hot water to faucet in short time and never runs out, can fill bath tub with hot water. We all love this heater.
Michael H. Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
4/5
Gas Hot Water - Very Inexpensive to Run
By Andrew A.
New York
Purchased 08/31/2016 |
Review Posted 10/28/2016
Bought my tank less gas water heater as I was just getting and switching to gas and my electric was 23 years old. Gas was not here until a month and a half later. I am up, running and took a very very long hot shower. Nice to never be able to run out. I ran the sink, kitchen sink, shower and it had no problem keeping up. Now comes the $350 dollar rebate from my gas supplier and a $300.00 tax credit from the Feds.
That is very nice when Comfort.com sells this at almost half of list. It does seem to generate a fair amount of condensate but we are in the rainy season and it has to be sucking in a lot of moisture. Since my electric water heater died a month and a half ago just when I got domestic water my last electric bill was half the next month. Now I am off my camping unit using propane and my bills should be fantastic. On a 20 Gallon propane tank it took about 20 gallons of propane for the time to get natural gas. One sad note I thought I was buying a unit made in USA as it was an AO Smith and the box came made in Japan, then on the heater on the face says powered by Takagi.
That is very nice when Comfort.com sells this at almost half of list. It does seem to generate a fair amount of condensate but we are in the rainy season and it has to be sucking in a lot of moisture. Since my electric water heater died a month and a half ago just when I got domestic water my last electric bill was half the next month. Now I am off my camping unit using propane and my bills should be fantastic. On a 20 Gallon propane tank it took about 20 gallons of propane for the time to get natural gas. One sad note I thought I was buying a unit made in USA as it was an AO Smith and the box came made in Japan, then on the heater on the face says powered by Takagi.
Andrew A. Recommends This
Was this review helpful?
Rating Breakdown
4/5
4/5
5/5
5/5
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A.O. Smith ATI-240H - Residential 160,000 BTU - Natural Gas Tankless Water Heater - Indoor
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