A.O. Smith Signature Series 6.6-GPM 160000-BTU Indoor Natural Gas Ultra-Low NOx Tankless Water Heater
Item #1055555 |
Model #GT15-240-NI
Delivers hot water for up to 2 simultaneous showers and 3 sinks when sized appropriately.
0.94 Uniform Energy Factor (UEF) for maximum energy efficiency and cost savings on this Ultra Low NOx indoor model.
Frees up valuable storage space with compact, indoor wall-mounted design.
Professional installation required - call 877-GO-LOWES
Provides peace of mind with a 15-year heat exchanger guarantee, 5-year parts guarantee and a 1-year limited labor warranty
Features integrated controls for easy temperature control and troubleshooting
Provides superior protection and extended water heater life with a copper primary heat exchanger and a stainless steel secondary heat exchanger
Worry-free safety features include freeze, overheat and surge protection as well as troubleshooting diagnostic codes
General | |||
|---|---|---|---|
Series Name | Signature Series | Fuel Type | Natural gas |
Type | Tankless | Installation Type | Wall mount |
Power Source | Gas | Ignition Type | Electronic |
Grade | Residential | Vent Type | PVC/ABS/CPVC |
Use Location | Indoor | ||
Dimensions | |||
|---|---|---|---|
Depth (Inches) | 11.25 | Water Connection Size | 3/4-in |
Family Size | 5 | Weight (lbs.) | 70 |
Height (Inches) | 23.63 | Width (Inches) | 17.75 |
Vent Diameter(s) | 3-in | ||
Features | |||
|---|---|---|---|
BTU Rating | 160000 | Maximum Gallons per Minute | 6.6 |
Emission Rating | Ultra Low NOx | Point of Use | No |
Grid Capable | No | Scale Prevention | No |
High Efficiency | No | Super High Efficiency | No |
Installation Location | N/A (Portable) | Uniform Energy Factor | .94 |
Compatibility | |||
|---|---|---|---|
Bluetooth Compatibility | No | Works with iOS | No |
Smart Compatible | No | Works with SmartThings | No |
Wi-Fi Compatibility | No | Works with the Google Assistant | No |
Works with Amazon Alexa | No | For Use with Mobile Homes | No |
Works with Android | No | For Use with RVs | No |
Works with Apple HomeKit | No | ||
Warranty | |||
|---|---|---|---|
Warranty | 15-year limited | ||
Certifications | |||
|---|---|---|---|
CA Residents: Prop 65 Warning(s) | Safety Listing | CSA safety listing | |
ENERGY STAR Certified | No | AHRI Certified | Yes |
Miscellaneous | |||
|---|---|---|---|
UNSPSC | 40101800 | ||
Check out the Best Selling Water Heaters on Lowes.com
Ratings may include incentivized customer reviews.
What Customers Are Saying
This tankless water heater is generally well-received, with many customers reporting it provides endless hot water, excellent features, and easy installation. The unit is praised for its efficiency and compact size. However, some customers have experienced issues with inconsistent hot water, noise, and reliability problems. Overall, the product appears to be a high-quality, powerful tankless water heater that delivers good value, though a small number of users have encountered difficulties.
Customer review summary generated by AI, including incentivized reviews.Loud / Heat Exchanger Leak / Deceptive Warranty
We purchased this unit online June 2020 and had no issues for almost 6 years. A few months ago, we noticed a small drip from the dirt leg. Upon inspection by a certified plumber, it was determined that there was a leak in the heat exchanger. The plumber worked this issue through with A.O. Smith on the phone and A.O. Smith agreed to the issue and verified warranty coverage. Unfortunately, this is where our real issues then began. The local Lowes store indicated that they could not locate t...
product damaged
big dent on the side of heater at top. pic not needed. A dent is a dent.
From Signature Series Super High Efficiency 10-GPM 199000-BTU Indoor Natural Gas Ultra-Low NOx Tankless Water Heater Verified Purchaser
We are sorry to hear of your experience.
We recommend reaching out to Lowe's Customer Care at 1-800-445-6937 or Text 84109.
Endless hot water
This is my second tankless hot water heater. They are fantastic for supplying endless hot water to different areas of the house at the same time. I’m replacing due to it freezing during an ice storm. I have heard tankless water heaters are notorious for this. I recommend you take all precautions if an ice storm or hard freeze is expected.
From aosmith.com
It’s only been a month, love it so far !
From Signature Series Super High Efficiency 10-GPM 199000-BTU Indoor Natural Gas Ultra-Low NOx Tankless Water Heater Verified Purchaser
DO NOT BUY
Do not buy. It never worked. The hot water charges to cold mid use. The company do not want to get it back or help. Lowe's washes their hands and tells you to call the manufacturer. I got the 5 years warranty that it's useless. They do not allow you to return it.
We are sorry to hear of your experience. We want to ensure the issue is resolved.
Please send your phone number to talktous@aosmith.co...
6 years strong
Have had this unit for 6 years... installed early covid... would highly recommend for the price point.
Strong and powerful gas tankless
My Rinnai tankless died after only 10 years, so I was in the market for a replacement. I looked around and found Lowe's had a larger more powerful (10 gpm vs 8.5 and 200k btu vs 152k) tankless and I decided to purchase it. It was in stock and on sale - perfect for my need. It took me 4 hours to install. Now the hot water comes out even hotter at all the taps, it was a good purchase - I'm happy with my choice. I did read the reviews prior to purchasing this tankless and I always know that unhap...
From Signature Series Super High Efficiency 10-GPM 199000-BTU Indoor Natural Gas Ultra-Low NOx Tankless Water Heater Verified Purchaser
Store a nd manufacturer wont retun item
This apparently is the only unit which doesn't come with a fuel conversion with purchase. I tried to return it or exchange it but the store wont accept a return without a return Authorization number from the manufacturer, and the manufacturer wont issue one since they dont consider this as a manufacturer problem. Im a disabled VET with Traumatic brain injuries living on disability so the loss of $1800 on this purchase hit hard... especially since i still needed to purchase ANOTHER water heater...
From Signature Series Super High Efficiency 10-GPM 199000-BTU Indoor Natural Gas Ultra-Low NOx Tankless Water Heater Verified Purchaser
We are sorry to hear of your experience. We want to ensure the issue is resolved.
Please send your phone number to talktous@aosmith.co...
Nice product
Installation was easy. Very quiet. Works great. Keeps up with four people in the house. No problem filling the whirlpool bath at 4 gallons per minute.
From aosmith.com
Heats fast
Works well so far, however I hope it lasts for yrs and in case needed they will be able to cover by the warranty
From aosmith.com
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We're sorry to hear of your experience.
We want to ensure you receive the warranty coverage included with your purchase.
Pl...