Top 27 AO Smith Tankless Water Heaters on Amazon (Verified You can Buy)
Top 1
Best for 10 GPM
A. O. Smith Tankless Water Heater - Natural Gas or Propane - 10.0 GPM On-Demand Hot Water - 199,000 BTU - X3 Scale Prevention - ATI-510CX3
A. O. Smith
ATI-510CX3 110
13.78 x 13.78 x 36.125 Inches
59.0001 pounds
Ratings for A. O. Smith (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| A. O. Smith Water Treatment | - | ❌ | ❌ | ❌ |
Features
ProLine XE Concentric Vent Indoor 199,000 BTU Non-Condensing Natural Gas Tankless Water Heater with X3 Scale Prevention Technology - Indoor Natural Gas 510CX3
Continuous flow rate up to 10.0 GPM. Commercial-grade copper heat exchanger is 25x better than stainless steel at heat transfer, stabilizing outgoing water temperatures quicker.
Top 2
A. O. Smith Tankless Water Heater Gas - On Demand Hot Water - Indoor - 8 GPM - Non-Condensing Natural Gas with X3 Scale Prevention Technology - 190,000 BTU ProLine XE - ATI-310CX3
A. O. Smith
ATI-310CX3
13.75 x 13.75 x 20.5 inches
51.0 pounds
0.81 UEF
Ratings for A. O. Smith (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| A. O. Smith Water Treatment | - | ❌ | ❌ | ❌ |
Features
Enjoy Continuous Flow: This heater allows a flow rate up to 8.0 GPM while X3 Scale Prevention Technology prevents scale buildup and maintains like-new performance longer. No annual descaling or isolation valves required.
Lower Your Energy Cost: Using our high-efficiency tankless water heater with up to .81 Uniform Energy Factor (UEF). Includes integrated temperature controls and advanced diagnostics for easy operation.
Top 3
Best for AO Smith
A. O. Smith Tankless Water Heater Natural Gas - On Demand Hot Water - 10 GPM - Outdoor 199,000 BTU Condensing - ProLine® XE ATO-540H-N
A. O. Smith
ATO-540H-N 100
17.75 x 17.75 x 23.63 inches
59.0 pounds
Ratings for A. O. Smith (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| A. O. Smith Water Treatment | - | ❌ | ❌ | ❌ |
Features
Reduce energy usage and enjoy endless hot water with the Energy Star, condensing Outdoor Natural Gas 540H tankless water heater. Delivers up to .94 Uniform Energy Factor (UEF) and a Continuous flow rate up to 10.0 GPM.
Provides a variety of installation options: outdoor and direct vent. Flexible power direct vent design allows for venting up to 100 feet using either PVC, CPVC, polypropylene or ABS Pipe (solid core). Includes a wall mount temperature remote controller and advanced diagnostics.
Top 4
Best for Rheem
Best for Inline
Best for Tanked
Best for Residential
Best for Rheem
Best for Rheem
Best for EcoSmart
Best for 6 GPM
Best for 9 GPM
Best for 15 GPM
Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY
Rheem
RTEX-13
12.63 x 8.25 x 3.63 Inches
3.9683 Pounds
at least 99.8% energy efficient
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| CARESAN | - | ✅ | ✅ | ✅ |
| CASA CAYOS | - | ✅ | ✅ | ✅ |
| Miami Water Heater | - | ✅ | ✅ | ✅ |
| PRODUCT X MAS | 9,301 | ✅ | ✅ | ✅ |
| Bullit Sales | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Columbiatradestock (S/N Info Recorded) | - | ❌ | ❌ | ❌ |
| Direct Supply Store | 5,162 | ❌ | ❌ | ❌ |
| USA-Fast-Delivery LLC | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
Features
External adjustable digital thermostatic control with LED display (+/1 degree accuracy
Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control
Top 5
Best for Rheem
Best for Inline
Best for Tanked
Best for Whole House
Best for Rheem
Best for 20 Gallon
Best for 50 Gallon
Best Tankless Water Heaters
Best for Rheem
Best for EcoSmart
Best for 3 GPM
Best for 5 GPM
Best for 7 GPM
Best for 8 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 12 GPM
Best for 14 GPM
Best for 15 GPM
Rheem 18kW 240V Tankless Electric Water Heater
Rheem
RTEX-18
18.5 x 14.5 x 3.5 inches
14.78 pounds
99.8%
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Miami Water Heater | - | ✅ | ✅ | ✅ |
| CARESAN | - | ✅ | ✅ | ✅ |
| CASA CAYOS | - | ✅ | ✅ | ✅ |
| Amazon.com | - | ✅ | ✅ | ✅ |
| Trena's Liquidation LLC | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Mega Mart Warehouse | - | ❌ | ❌ | ❌ |
| PEACHSTATESTEALSANDDEALS | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
Features
External digital thermostatic control with LED display (+/1 degree accuracy)
Most advanced self-modulation, adjust power to meet hot water demand
Top 6
A. O. Smith Tankless Water Heater Gas - Propane - Outdoor - 6.6 GPM On Demand Hot Water - Outdoor - 120,000 BTU Condensing - ProLine® XE ATO-140H
A. O. Smith
ATO-140H 101
13.87 x 13.87 x 22.875 inches
52.0004 Pounds
Ratings for A. O. Smith (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| A. O. Smith Water Treatment | - | ❌ | ❌ | ❌ |
Features
ProLine XE Ultra-Low NOx Outdoor 120,000 BTU Condensing Propane Tankless Water Heater Outdoor Propane 140H. Continuous hot water flow rate up to 6.6 GPM.
Wall-mount design saves valuable space and allows for additional storage and flexibility. Vents with 3” PVC up to 70 feet or 4" PVC up to 100 feet.
Top 7
Best for 100 Gallon
Tankless Water Heater Electric, 110V 3000W Instant Hot Water Heater with Adjustable Temperature & US Plug for Kitchen, RV, Small Sink – No Waiting, Energy Efficient - Black
sanheshun
257416
4.5 x 4.5 x 7.8 inches
2.0 Pounds
Ratings for sanheshun (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| SANHESHUN | - | ❌ | ❌ | ❌ |
Features
💦【High Quality】This is a compact and efficient water heater that can quickly produce hot water. The heater is safe, energy-saving, water-saving, pollution-free, and no exhaust gas. Durable, elegant and stylish.
💦【SAFETY DESIGN】The heater has leakage protection, IPX4 waterproof design, dry heat protection, water and electricity isolation, automatic power off in inactive state, automatic power off when over temperature, etc. ✤Easy to install: It is easy to install in the bathroom or kitchen sink for washing dishes, washing food, washing clothes, washing face and other functions.
Top 8
Best for Rheem
Best for Inline
Best for Tanked
Best for Electric
Best for Rheem
Best Tankless Water Heaters
Best for Rheem
Best for 6 GPM
Best for 12 GPM
Best for 14 GPM
Best for 15 GPM
Rheem 6.5kW 240V Point of Use Thermostatic Tankless Electric Water Heater
Rheem
RTEX-06T
3.0 x 6.0 x 6.0 inches
4.0 pounds
Highly Efficient
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
| Valley Deals AZ | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Trena's Liquidation LLC | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
Features
Endless On-Demand Hot Water - Consistent hot water when you need it that never runs out
Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature
Top 9
Best for Rheem
Best for Inline
Best for Tanked
Best for Electric
Best for Whole House
Best for Rheem
Best Tankless Water Heaters
Best for Rheem
Best for Rinnai
Best for 2 GPM
Best for 3 GPM
Best for 5 GPM
Best for 6 GPM
Best for 7 GPM
Best for 8 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 12 GPM
Best for 14 GPM
Best for 15 GPM
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
Rheem
RTEX-24
18.25 x 14.5 x 3.5 inches
17.8 pounds
99.8% Energy efficient
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
| GM Not Mo | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Sunny ING | - | ❌ | ❌ | ❌ |
| Nantek | - | ❌ | ❌ | ❌ |
| Columbiatradestock (S/N Info Recorded) | - | ❌ | ❌ | ❌ |
| Trena's Liquidation LLC | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
Features
ON/OFF Dial Control with adjustable digital temperature display
Self-modulating power control
Top 10
Best for AO Smith
AO Smith EJC-6 Residential Electric Water Heater
A. O. Smith
EJC-6
14.25 x 14.25 x 15.25 inches
25.59 pounds
Ratings for A. O. Smith (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Plumbing Planet | 5,489 | ✅ | ✅ | ✅ |
| eFaucets | 9,547 | ❌ | ❌ | ❌ |
Features
Compact design
Side-Mounted Plumbing and Electrical Connections
ThermoMate 6kW Tankless Water Heater Electric for Sink Washing ETL Listed
thermomate
ET060
7.5 x 7.5 x 11.2 inches
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
[Instant Sink Hot Water] - 6kw power heating system provides 1.0GPM at 35°F Temp Rise on demand hot water in seconds for point-of-use applications, perfect for under / over sink faucet. Temperature range from 85°F - 131°F. 24 Hours standby. Draw 25Amp @ 240V
[Self-modulating Power] - Regulating the amount of energy required to heat water only when you need it with 99.8% efficient.
Top 12
Best for Inline
Best for Electric
Best for NG
Best for Compact
Best for Digital
Best for Mini
Best for Outdoor
Best for Thermostat
Best for Whole House
Best for Under Sink
Best for Wall
Best for Residential
Best for High Efficiency
Best for 120 Volt
Best for 10 Gallon
Best for 60 Gallon
Best for 80 Gallon
Best for 100 Gallon
Best Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for EcoSmart
Best for FOGATTI
Best for GASLAND
Best for Eccotemp
Best for 2 GPM
Best for 9 GPM
Best for 11 GPM
Best for 12 GPM
Best for 14 GPM
Best for 15 GPM
110V Tankless Water Heater Electric, 3000W Tankless Electric Water Heater Instant, Under Sink Water Heater with Digital Display, On Demand Hot Water Heaters Electric for Kitchen Washin Bathroom.
xwdzswgs
Tankless Water Heater
4.32 x 4.32 x 7.86 Inches
Ratings for xwdzswgs (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| liuyiliang7788 | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Tankless Electric Water Heater - This electric tankless water heater uses stainless steel and ABS materials, LED display. With 3000W power, the electric water heater tankless can raise the water by 82° F(0.3GPM) -131° F(0.5GPM) in seconds. The instant water heater can set Fahrenheit or Celsius degrees by holding the power button for 6 seconds. This 110 volt electric tankless hot water heater uses advanced technology, no need to preheat, eliminating the long waiting time for hot water!
Safety Intelligence Reliable - This instant hot water heater has multiple protection functions. IPX4 waterproof, water and electricity isolation, leakage protection, dry boil protection, and automatic power off under overheating and inactivity. On demand water heater with LCD digital display, intelligent detection of working status, and performance. The thermal efficiency of electric hot water heater is as high as 98%, allowing you to enjoy hot water at any time and save energy.
Top 13
A. O. Smith Tankless Water Heater Gas - On Demand Hot Water 6.6 GPM ProLine® XE Ultra-Low NOx Outdoor 120,000 BTU Condensing Natural Gas Tankless Water Heater
A. O. Smith
ATO-140H 100
13.87 x 13.87 x 22.875 inches
50.0008 pounds
Ratings for A. O. Smith (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| A. O. Smith Water Treatment | - | ❌ | ❌ | ❌ |
Features
ProLine XE Ultra-Low NOx Outdoor 120,000 BTU Condensing Natural Gas Tankless Water Heater ATO-140H. Continuous hto water flow rate up to 6.6 GPM.
Wall-mount design saves valuable space and allows for additional storage and flexibility.
Top 14
Best for Rheem
Best for Rheem
Best for 50 Gallon
Best for 75 Gallon
Best for Rheem
Best for 3 GPM
Best for 4 GPM
Rheem RRTGH84DVLN3701171 Rheem RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Rheem
RTGH-84DVLN-3
9.8 x 17.7 x 23.7 inches
59.88 pounds
Super High Efficiency
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| MTL Retailers | - | ❌ | ❌ | ❌ |
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
Flow rate of 0.4 - 8.4 GPM
Available temperature settings range from 100 to 140F (default setting of 120F)
Top 15
Best Gas Water Heaters
Best for Tankless
Best for Takagi
Best for 2 GPM
Best for 4 GPM
Best for 5 GPM
Best for 6 GPM
Best for 8 GPM
Best for 9 GPM
Ranein Propane Gas Tankless Water Heater, Indoor Max 8.5 GPM, 190,000 BTU Instant Hot Water Heater
Ranein
RH19K-LPG
15.08 x 15.08 x 24.25 inches
42.0 Pounds
Ratings for Ranein (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Ranein Store | - | ❌ | ❌ | ❌ |
Features
Fans Placed Underneath: It will be more secure in terms of safety, and no smoke backflow will occur. The blower has large power and can automatically adjust the rotating speed according to the change of external wind pressure and the change of water temperature to provide sufficient oxygen for gas combustion, ensuring full combustion and safer use. Low noise and longer service life.
No Waiting Required: Unlike traditional tank water heaters, tankless water heaters eliminate the need for a 30-minute preheating wait time, allowing you to have unlimited hot water on demand.
Top 16
Best for Inline
Best for 20 Gallon
Best Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for EcoSmart
Best for FOGATTI
Best for GASLAND
Best for Eccotemp
ECOAPTUNIT 220V Tankless Water Heater Electric, 20AMP 3800W
ECOAPTUNIT
XY-FG
4.53 x 4.53 x 7.86 Inches
Ratings for ECOAPTUNIT (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ECOAPTUNIT | - | ❌ | ❌ | ❌ |
Features
Tankless Water Heater Electric: This electric tankless water heater is crafted from stainless steel and ABS, featuring a built-in LED display. With 3800W of power, it can raise water temperature by 33°F in a few seconds at 0.6 GPM or 22°F at 0.4 GPM within seconds. The unit supports both Fahrenheit and Celsius settings—simply press and hold the power button for 6 seconds to switch between them. Operating on a 220V circuit, this advanced instant heater eliminates the need for preheating, so you no longer have to wait for warm water.
Reliable and Smart: This 220v tankless water heater integrates multiple safety safeguards such as IPX4 waterproofing, isolation of water and electricity, leak detection, dry-boil prevention, and auto power-off triggered by overheating or idle conditions. Its LED screen provides intelligent real-time feedback on working status and performance. Boasting a thermal efficiency of up to 98%, this unit ensures warm water is always available without wasting energy.
Top 17
Best for Rheem
Best for Inline
Best for Tanked
Best for Electric
Best for NG
Best for Thermostat
Best for Whole House
Best for Rheem
Best Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for Rheem
Best for Rinnai
Best for EcoSmart
Best for FOGATTI
Best for GASLAND
Best for Eccotemp
Best for 2 GPM
Best for 4 GPM
Best for 5 GPM
Best for 7 GPM
Best for 8 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 12 GPM
Best for 14 GPM
Best for 15 GPM
Rheem 11kW 240V Tankless Electric Water Heater
Rheem
RTEX-11
12.63 x 8.25 x 3.63 inches
7.0548 Pounds
99,8%
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
| Plumber's Paradise | - | ✅ | ✅ | ✅ |
| CASA CAYOS | - | ✅ | ✅ | ✅ |
| AXY Co | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Trena's Liquidation LLC | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
Features
ON/OFF Dial Control with adjustable digital temperature display
Self-modulating power control
Top 18
Best for 10 Gallon
Best for 100 Gallon
Best for Takagi
Best for Noritz
Best for EcoSmart
Best for FOGATTI
Best for GASLAND
Best for Eccotemp
ECOAPTUNIT 110V Tankless Water Heater Electric, 3000W
ECOAPTUNIT
110v tankless water heater 3000w
4.53 x 4.53 x 7.86 inches
Ratings for ECOAPTUNIT (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ECOAPTUNIT | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Tankless Water Heater Electric: This electric tankless water heater is crafted from stainless steel and ABS, featuring a built-in LED display. With 3000W of power, it can raise water temperature by 35°F in a few seconds at 0.5 GPM or 21°F at 0.3 GPM within seconds.The unit supports both Fahrenheit and Celsius settings—simply press and hold the power button for 6 seconds to switch between them. Operating on a standard 110V outlet, this advanced instant heater eliminates the need for preheating, so you no longer have to wait for warm water.
Reliable and Smart: This 110v tankless water heater integrates multiple safety safeguards such as IPX4 waterproofing, isolation of water and electricity, leak detection, dry-boil prevention, and auto power-off triggered by overheating or idle conditions. Its LED screen provides intelligent real-time feedback on working status and performance. Boasting a thermal efficiency of up to 98%, this unit ensures warm water is always available without wasting energy.
Top 19
Best for Inline
Best for Gas Powered
Best for LP
Best for Digital
Best for Outdoor
Best for Indoor
Best for Propane
Best for 20 Gallon
Best for Takagi
Best for Noritz
Best for EcoSmart
Best for FOGATTI
Best for GASLAND
Best for Eccotemp
Best for 7 GPM
Best for 8 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 12 GPM
Best for 14 GPM
Best for 15 GPM
18L Tankless Water Heater Propane with Digital Display 4.76 GPM 115425 BTU
Baococo
YYJ24046-18
12.6 x 12.6 x 23.23 inches
Ratings for Baococo (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
Efficient & Energy-Saving: Built with cutting-edge, precision-engineered combustion technology, this propane tankless water heater delivers consistent, powerful performance while slashing fuel consumption and lowering operational burning noise for a quieter user experience. It generates a robust 115,425 BTU/hour of heating power, enough to meet steady hot water demands for camping, RV travel, outdoor bathing, and pet washing.
Reliable Technical Specifications: This portable propane water heater boasts a maximum heating output of 115,425 BTU/hour, with an adjustable temperature range from a minimum 17°F up to a maximum 113°F to match different usage needs. The system delivers a steady 4.76 gallons per minute of continuous hot water flow, perfect for quick showers, dishwashing, or pet cleaning.
Top 20
Best Water Heaters
Best for EcoSmart
Best for Inline
Best for Electric
Best for Compact
Best for Thermostat
Best Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for Stiebel Eltron
Best for EcoSmart
Best for FOGATTI
Best for Eccotemp
Best for 8 GPM
Best for 11 GPM
EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW - Quantity 1, 12 x 8 x 4
EcoSmart
ECO 8
4.0 x 8.0 x 12.0 inches
4.75 pounds
99.8%
Ratings for EcoSmart (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
| W fashion shop | - | ✅ | ✅ | ✅ |
| MaxWarehouse | 248 | ✅ | ✅ | ✅ |
| Columbiatradestock (S/N Info Recorded) | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
The product is highly durable
The product is easy to use
Top 21
Best for Compact
Best for Remote Control
Best for 80 Gallon
Best for 100 Gallon
Best for Takagi
Best for Eccotemp
Best for 10 GPM
KENUOS Electric Tankless Water Heater 110V 3000W,Point Of Use Instant Hot Water Heater with Digital Display & Remote Control Fast Heating Compact Under Sink Water Heater for Kitchen,Bathroom
KENUOS
3000w tankless water heater
8.3 x 8.3 x 5.9 Inches
Ratings for KENUOS (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| KENUOS-US | - | ❌ | ❌ | ❌ |
Features
10 Second Instant Hot Water Heater - KENUOS tankless water heater heats up instantly without preheating or waiting,delivers stable hot water anytime for point-of-use needs.Temperature ranges from 95°F to 131°F, meeting daily hot water demands like hand washing,vegetable washing and dish washing,getting rid of cold water discomfort
Dual Mode Control - KENUOS 110V electric tankless water heater supports both remote control and touch screen operation. It is safer to use even with wet hands, allowing you to get hot water more conveniently
Top 22
Best Water Heaters
Best for Rheem
Best for Inline
Best for Tanked
Best for Electric
Best for Under Sink
Best for 120 Volt
Best for Rheem
Best for Takagi
Best for Rheem
Best for FOGATTI
Best for Eccotemp
Best for 2 GPM
Best for 7 GPM
Best for 8 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 12 GPM
Best for 14 GPM
Best for 15 GPM
Rheem 3.5kW 120V Point of Use Thermostatic Tankless Electric Water Heater
Rheem
RTEX-04T
3.0 x 6.0 x 6.0 inches
4.0 pounds
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Eagle Point [S/N Recorded] | - | ❌ | ❌ | ❌ |
| Amazon.com | - | ❌ | ❌ | ❌ |
| Valley Deals AZ | - | ❌ | ❌ | ❌ |
| Profitwise Brands | - | ❌ | ❌ | ❌ |
| eFaucets | 9,547 | ❌ | ❌ | ❌ |
| Columbiatradestock (S/N Info Recorded) | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
Features
ELECTRICAL REQUIREMENTS: 1 x 30 AMP Double Pole Breaker Required. Product installation hard wired to 120 volts requiring a 30-amp breaker.
SAVES SPACE: Ideal for low flow point-of-use applications, such as in a bathroom, office breakroom, wet bar, or garage. The compact size of the water heater is up to 98% smaller than a standard electric water heater.
Top 23
Best for Inline
Best for Tanked
Best for Electric
Best for Boiler
Best for 40 Gallon
Best for 80 Gallon
Best Tankless Water Heaters
Best for Noritz
Best for Rinnai
Best for 2 GPM
Best for 3 GPM
Best for 5 GPM
Best for 6 GPM
Best for 7 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 12 GPM
Best for 14 GPM
Best for 15 GPM
14kW Tankless Water Heater Electric, ORBEK On Demand Instant Hot Water Heater 240V, Max 3.38 GPM, Supply for 1-2 Fixtures, ETL Certified, Indoor Installation, New Upgraded 2.0
Orbek
14kW 2.0 Model
9.5 x 9.5 x 14.2 Inches
Ratings for Orbek (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Westinghouse Home Comfort Direct | - | ❌ | ❌ | ❌ |
Features
Note: Please ensure the household circuit breaker panel has a total current capacity of at least 150 amps. Our Orbek tankless water heater electric 14kw requires a 240V/60AMP two-pole breaker, 1 set of 6 AWG wires and 1/2" NPT water connections.
Instant Hot Water Supply: Orbek electric tankless water heater 240v can provides max 3.38 GPM of on demand endless hot water and ensure comfortable hot water for 2-3 points of use
Top 24
Best Water Heaters
Best for Compact
Best for Mini
Best for Waterproof
Best for Under Sink
Best for Wall
Best for 10 Gallon
Best for 60 Gallon
Best for 100 Gallon
Best Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for EcoSmart
Best for FOGATTI
Best for GASLAND
Best for Eccotemp
Tankless Water Heater Electric, 3000W Tankless Electric Water Heater 110V, On Demand Hot Water Heater Electric with Digital Display, Electric Tankless Hot Water Heater for Kitchen Bathroom Washin
xwdzswgs
Water Heater Electric
4.31 x 4.31 x 7.85 Inches
98%
Ratings for xwdzswgs (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| liuyiliang7788 | - | ❌ | ❌ | ❌ |
Features
Electric Tankless Water Heater - This instant water heater is equipped with state-of-the-art technology, with 3000W power, LED display. The electric water heater tankless can raise the water by 82° F(0.3GPM) -131° F(0.5GPM) in seconds. The instant hot water heater can set Fahrenheit or Celsius degrees by holding the power button for 6 seconds. Water heater compatible with the US standard 110 volts.
Safety Intelligence Reliable - This on demand water heater has multiple protection features. IPX4 waterproof, leakage protection, dry-burning protection, automatic power-off in over-temperature and inactive states. The thermal efficiency of tankless hot water heater is as high as 98%. Tankless hot water heater electric with LCD digital display, intelligent detection of working status, and performance to ensure safety.
Top 25
Best Water Heaters
Best for CAMPLUX
Best for Inline
Best for Wall
Best for 120 Volt
Best for 100 Gallon
Best Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for EcoSmart
Best for FOGATTI
Best for GASLAND
Best for Eccotemp
Best for CAMPLUX
Best for 7 GPM
Best for 15 GPM
CAMPLUX Tankless Water Heater Electric 120V, 4.5kW Point of Use Instant Hot Water Heater, Save Space for Sink Wall Mounted LED Digital Display CSA Certified
CAMPLUX ENJOY OUTDOOR LIFE
TE05N4
7.4 x 7.4 x 10.9 inches
4.5 pounds
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Camplux | - | ❌ | ❌ | ❌ |
Features
【Instant Hot Water】 4.5kW under sink water heater only heats the water when you need it and no waiting to preheat, saving up to 50% in energy consumption. The temperature rise of 1.0 GPM is 50°F. Easy to get hot water in 3 seconds
【Save Space】 With a mini size of 10.95W×2.52H×7.4D inch, mounted multi-angled in small spaces throughout the kitchens, wet bars, schools, hospitals, hair salons, and boats
Top 26
Best for Digital
Best for Mini
Best for Under Sink
Best for 120 Volt
Best for Takagi
Best for Noritz
Best for Eccotemp
Mini Tankless Water Heater Under Sink, 3kW 120V Plug-in, LED Digital Display with Big Control Knob, IPX4, Multiple Safety Features, 1 Point of Use, 30-55℃ Thermostatic Electric Instant Water Heater
Generic
C3000-USA
7.1 x 7.1 x 9.8 inches
A+
Ratings for Generic (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| LECLOC SHOP | - | ❌ | ❌ | ❌ |
Features
Note: This 3kW 120V mini water heater is designed for low-flow use only, not suitable for showers or multiple taps at once. The output water temperature is affected by many factors, including the water heater wattage (heating capacity), inlet water temperature and water flow. For a better warm water use experience, we recommend that you consider our higher wattage model 6kW 240V first, which is hard-wired
LED Digital Display with Big Control Knob: This point of use water heater is very easy to use. 1 knob for power ON/OFF and temperature adjustment, offering a better use experience than others 3 little touchscreen buttons. You can adjust the temperature between 30℃ and 55℃
Top 27
Best for Gas Powered
Best for LP
Best for Indoor
Best for Whole House
Best for Propane
Best for Boiler
Best for 30 Gallon
Best for 50 Gallon
Best for 60 Gallon
Best for 80 Gallon
Best for 30 Gallon
Best for 50 Gallon
Best for 100 Gallon
Best for GASLAND
Best for Eccotemp
VEVOR Tankless Water Heater Propane, 4.3Gal Instant Water Heater, 100000 BTU, Silver Gray, Smart Temperature Control, Multiple Security Protections, Indoor Use for Whole House
VEVOR
JSQ30-B
13.78 x 13.78 x 21.65 inches
19.75 pounds
Efficient
Ratings for VEVOR (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
Enjoy Instant Hot Water: This 4.3Gal, 100,000 BTU/h tankless water heater powered by propane, lets you and your family say goodbye to cold water and enjoy constant, comfortable hot water for showers and more
±1℉ Precision Temperature Control: Smart sensors maintain the water temperature within ±1℉ of the set value, avoiding large fluctuations and ensuring a consistent and comfortable water temperature
Top 10 AO Smith Tankless Water Heaters - Verified to Buy (October 2026)
- 1. A. O. Smith Tankless Water Heater - Natural Gas or...
- 2. A. O. Smith Tankless Water Heater Gas - On Demand...
- 3. A. O. Smith Tankless Water Heater Natural Gas - On...
- 4. Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY
- 5. Rheem 18kW 240V Tankless Electric Water Heater
- 6. A. O. Smith Tankless Water Heater Gas - Propane -...
- 7. Tankless Water Heater Electric, 110V 3000W Instant Hot Water Heater...
- 8. Rheem 6.5kW 240V Point of Use Thermostatic Tankless Electric Water...
- 9. Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
- 10. AO Smith EJC-6 Residential Electric Water Heater
Top 10 AO Smith Tankless Water Heaters Brands on Amazon
Here is the list of top-rated brands that were evaluated by CherryPicks.
- A. O. Smith
- Rheem
- sanheshun
- thermomate
- xwdzswgs
- Ranein
- ECOAPTUNIT
- Baococo
- EcoSmart
- KENUOS
Related AO Smith Tankless Water Heaters Guides
For more personalized AO Smith Tankless Water Heaters guides, Check those pages,
Brand
Top 10 AO Smith Tankless Water Heaters Sellers: CPR Seller Rank List
CPR sellers rank is based on CherryPicks-AI bestselling ranking system that helps us analyze each seller's sales trends. The List of top seller ranks is our in-house data, essential for our product ranking to help you make the right shopping choice.
- 1. MaxWarehouse : 147,519 Yearly Feedback , Avg. Ratings 4.7
- 2. Direct Supply Store : 12,760 Yearly Feedback , Avg. Ratings 4.9
- 3. Plumbing Planet : 12,116 Yearly Feedback , Avg. Ratings 4.9
- 4. PRODUCT X MAS : 7,305 Yearly Feedback , Avg. Ratings 4.9
- 5. eFaucets : 7,127 Yearly Feedback , Avg. Ratings 4.4
- 6. A. O. Smith Water Treatment : 3,174 Yearly Feedback , Avg. Ratings 4.9
- 7. Camplux : 2,742 Yearly Feedback , Avg. Ratings 4.7
- 8. Plumber's Paradise : 2,222 Yearly Feedback , Avg. Ratings 4.8
- 9. MTL Retailers : 499 Yearly Feedback , Avg. Ratings 4.1
- 10. Amazon.com : 386 Yearly Feedback , Avg. Ratings 4.7
| Rank | Name | Yearly Feedbacks | Avg. Ratings |
|---|---|---|---|
| 🥇 | MaxWarehouse | 147,519 | 4.7 |
| 🥈 | Direct Supply Store | 12,760 | 4.9 |
| 🥉 | Plumbing Planet | 12,116 | 4.9 |
| 4 | PRODUCT X MAS | 7,305 | 4.9 |
| 5 | eFaucets | 7,127 | 4.4 |
| 6 | A. O. Smith Water Treatment | 3,174 | 4.9 |
| 7 | Camplux | 2,742 | 4.7 |
| 8 | Plumber's Paradise | 2,222 | 4.8 |
| 9 | MTL Retailers | 499 | 4.1 |
| 10 | Amazon.com | 386 | 4.7 |
[Get] AO Smith Tankless Water Heaters Deals (✅Exclusively for Prime)
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Why Should You Trust Us?
Now hundreds and thousands of Rough Plumbing supplies are available on Amazon, Picking the right one is not easy, and that may take a lot of your time, Right? and What is the best AO Smith Tankless Water Heaters to buy for new October 2026?
CherryPicks’s Methodology for Evaluating AO Smith Tankless Water Heaters
We developed the CherryRatings-AI system to identify and score reviews and the CherryPicks-AI ranking system that uses TensorFlow framework to generate the best list, It will help us evaluate Rough Plumbing items that sell on Amazon. The score of items is based on over ten parameters such as analyzing customer review content, product reviewing rating statistics, brand reputation evaluation, comparing product price with features, etc, You can visit How We Rank to learn more in detail.
We collected and analyzed 306 of AO Smith Tankless Water Heaters reviews based on our selection criteria. It helped us shortlist the top qualified and rated AO Smith Tankless Water Heaters for Rough Plumbing, We found that most customers choose AO Smith Tankless Water Heaters with an average price of $324.52, and the top brands are Generic, VEVOR, CAMPLUX ENJOY OUTDOOR LIFE, EcoSmart, Rheem, thermomate And A. O. Smith.
Then our expert-level editors reviewed all those quality items and selected the top 27 AO Smith Tankless Water Heaters for you, We have researched hundreds of sellers and picked the top sellers for Rough Plumbing, including Amazon Resale, MaxWarehouse, Direct Supply Store, Plumbing Planet, PRODUCT X MAS, eFaucets, A. O. Smith Water Treatment, Camplux, Plumber's Paradise, MTL Retailers, Amazon.com And USA-Fast-Delivery LLC. The A. O. Smith Tankless Water Heater - Natural Gas... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 31 consumers with an average rating of 4.1.
We've helped a lot of satisfied users get the right Tools & Home Improvement product based on their needs, and save lots of time for them to pick AO Smith Tankless Water Heaters to buy.
Sandy Armstrong is a sit-at-home mom that has used a good number of home appliances — some were good, others average, while some were terribly bad and a waste of money. She is here to help you avoid wasting your money by providing you with honest reviews on appliances.