5 Best A.O. Smith Water Heaters in 2020 – Reviews and Buyer’s Guide

Having to take a cold shower is perhaps everyone’s biggest fear, especially during the winter season. On top of that, chores like cleaning, doing dishes, and laundry turns the situation into a nightmare.

Hot water has become a modern-day staple of every household, be it small or large.

If you have been facing similar problems and have been looking around for a high-quality water heater, I’m sure you must have come across the name ‘A.O. Smith’ several times. It is simply not possible to talk about water heaters and not mention A.O. Smith, a company highly responsible for revolutionizing the water heater industry.

A.O Smith is undoubtedly one of the top brands in the water heater industry. With over 140 years of experience, the company has come up with hundreds of innovative ideas and tons of different water heating products.

The best features of the A.O. Smith water heaters are high performance and advanced technology with minimum energy consumption. Although these water heaters are relatively expensive, they make every penny worth the investment with their performance, efficiency, and durability.

In this article, we have reviewed five of the best A.O. Smith Water Heaters so that you can have some prior knowledge before you replace an old water heater with their products. Along with the detailed review, we have also included a comparison chart of each product and FAQs about the water heaters.
Let’s dive into it!

Our Top Pick

A.O. Smith ATI-540H-N

As one of the leading water heater companies, A.O. Smith produces several high-quality products, be it gas, electric, or even solar. Among all the different models, we rank A.O. Smith ATI-540H-N as the best A.O. Smith water heater available in the market.

Especially designed for residential purposes, the ATI-540H-N model is capable of delivering hot water at rate of 10 GPM. It is constructed with commercial-grade copper which is guaranteed to last for a long time. In addition to that, this unit qualifies the Energy Star requirements and is certified to ultra-low NOx regulations.

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Quick Summary of Best A.O. Smith Water Heaters

Product Image Product Name
Top Pick for Excellent Performance
A.O. Smith ATI-540H-N Tankless Heater

A.O. Smith ATI-540H-N is simply a beast of a system when it comes to water heaters. With the capacity to deliver 10 gallons of hot water every minute, this unit is perfect for a medium household. Besides, it also exceeds the requirements of Energy Star and is recognized as an ultra low-NOx product.

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Top Pick for Overall Performance
A.O. Smith BTR-200 Water Heater

Master-Fit BTR-200 is a gas-fueled tank-type heating system that delivers up to 8 gallons of hot water every minute, which is sufficient for a medium-sized family. Additionally, it is powered by self-cleaning technology that eliminates the sediment build-up inside the container. It also meets the efficiency standards of the United States Department of Energy with 80% thermal efficiency.

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A.O. Smith Heating System with High Flow Rate
A.O. Smith ATI-510-N Tankless Heater

ATI-510-N is another gas fueled water heater on the list. This water heating unit is rigorously designed for both commercial and residential insulations. It can produce up to 10 gallons of water within a minute, which is more than enough for a medium family. Also, the primary heat exchanger of ATI-510-N is built out of heat-resistant HRS35 copper alloy.

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Best Value for Money
A.O. Smith EJC-6 Water Heater

A.O. Smith EJC-6 is a compact water heating system that includes a single heating element. This electric residential heater also features a sturdily built brass drain valve. This space-saving water heater can virtually fit anywhere, be it under the sink or in crawl spaces.

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Top Pick for Space-Saving Design
A.O. Smith GCR-40 ProMax Plus Water Heater

A.O. Smith GCR-40 ProMax Plus offers a highly economical performance by delivering up to 70 gallons of hot water every hour. The compact and space-saving design of this water heating unit not only provides high performance but also reduces energy consumption. Additionally, the water tank and spare parts of this A.O. Smith unit comes with a 6-year warranty.

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Best A.O. Smith Water Heaters of 2020 - Reviewed

A.O. Smith ATI-540H-N Tankless Heater

Top Pick for Excellent Performance

Features Highlights

  • High efficiency with a flow rate of 10 GPM
  • Includes Air-Fuel Ratio (AFR) Sensor
  • Ultra low-NOx emissions
  • Sturdily built with commercial grade copper
  • Offers both indoor as well as outdoor options
If you’re looking for a highly efficient water heater for residential use, look no further than the A.O. Smith ATI-540H-N Tankless Heater. Check Price on Amazon

Product Specification

  • Dimensions:

    12.5 x 18.5 x 29.5 inches

  • Weight:

    59 pounds

  • Flow Rate:

    10 Gallons Per Minute

  • Voltage:

    120 Volts

  • Material:

    Commercial Grade Copper

  • Warranty:

    15 Years Limited Heat Exchanger Warranty and 5 Years Limited Parts Warranty

Pros

  • High flow rate up to 10 GPM
  • Qualifies for Low-NOx standards
  • Made out of commercial-grade copper
  • Comes with multiple safety features
  • 15 years warranty period

Cons

  • Does not include remote control
  • Smaller top clearance may limit the installation options

Our Verdict

A.O. Smith ATI-540H-N is one of the best options if you’re opting for a water heater for residential purposes. This high-quality heating system can deliver 10 gallons of hot water within a minute. This means it is capable of serving non-stop hot water for a medium to large household with up to three showers. With tons of safety features, this unit is also perfect for families with children. The ATI-540H-N by A.O. Smith is sturdily built out of commercial-grade copper and is backed by a 15 years warranty to ensure reliability and longevity of the product.

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A.O. Smith BTR-200 Water Heater

Top Pick for Overall Performance

Features Highlights

  • Self-cleaning feature to stay protected against the buildup of lime and other sediments
  • Longer-lasting CoreGard anode rods with anti-corrosive stainless steel core
  • Features three sets of water connections
  • Includes a low NOx burner
  • Thermostat dual controller to reduce thermal stacking
  • Meets the thermal efficiency of the U.S. Department of Energy
If you’re opting for a premium quality water heater that is capable of delivering an endless supply of hot water with high thermal efficiency, A.O. Smith BTR-200 is your best bet. Check Price on Amazon

Product Specification

  • Dimensions:

    30.2 x 30.2 x 72 inches

  • Weight:

    630 pounds

  • Flow Rate:

    8 Gallons Per Minute

  • Voltage:

    120 Volts

  • Material:

    Stainless Steel

  • Warranty:

    Limited 3 Years Warranty

Pros

  • Self-cleaning technology
  • Highly durable CoreGard anode rods
  • Anti-corrosive stainless steel core
  • Features low NOx burner
  • Thermostat dual controller
  • Meets the standards of UL Sanitation and NSF Standard 5

Cons

  • Less warranty period
  • Expensive
  • Bulky in size

Our Verdict

A.O. Smith BTR-200 is a premium tank-type water heater, specially designed for commercial purposes. Although it is relatively expensive, the performance and built-quality of this unit make every penny worth the investment. One feature that makes this water heater stand out among the crowd is its self-cleaning eliminator technology. This prevents sediment build-up in the tank and increases the lifespan of the system.

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A.O. Smith ATI-510-N Tankless Heater

A.O. Smith Heating System with High Flow Rate

Features Highlights

  • Has a maximum flow rate of 10 GPM
  • Is available in both propane and natural gas variants
  • Low NOx Emissions
  • Qualifies with lead-free standards
  • Compact size makes it convenient to mount the unit to your wall
  • Built with heat-resistant HRS35 Copper Alloy
If you’re on the hunt to find an energy-efficient water heating system for your home, A.O. Smith ATI-510-N ticks all the right boxes. Check Price on Amazon

Product Specification

  • Dimensions:

    9.5 x 13.8 x 20.2 inches

  • Weight:

    39 pounds

  • Flow Rate:

    10 Gallons Per Minute

  • Voltage:

    120 Volts

  • Material:

    HRS35 Copper Alloy

  • Warranty:

    12 Years on Heat Exchanger and 5 Years on Parts

Pros

  • Consists of dual heat exchanger
  • Delivers high flow rate of 10 GPM
  • Low NOx Emission Standard
  • Compact and space-saving design
  • Constructed with heat-resistant copper alloy
  • Backed by 12-year warranty

Cons

  • Relatively expensive

Our Verdict

A.O. Smith ATI-510-N is simply a beast when it comes to the water heating systems. With a compact design and high performance, this unit is ideal for both residential as well as commercial applications. This appliance is constructed with high-quality copper alloy and has a high flow rate of 10 GPM. Additionally, the manufacturer also provides a 12 years warranty on the heat exchanger and a 5 years warranty on spare parts.

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A.O. Smith EJC-6 Water Heater

Best Value for Money

Features Highlights

  • Meets or exceeds with HUD standards
  • Compact and space-saving design
  • 6-years limited warranty on tank and spare parts
  • Features eco-friendly insulation to prevent heat loss
  • Includes tamper-resistant brass drain valve
If you’re considering a water heater for small homes or apartments that do not have enough space available, you should definitely go for the compact-sized A.O. Smith EJC-6. Check Price on Amazon

Product Specification

  • Dimensions:

    14.2 x 14.2 x 15.2 inches

  • Weight:

    25.6 pounds

  • Flow Rate:

    6 Gallons Per Minute

  • Voltage:

    120 Volts

  • Material:

    Commercial-Grade Copper

  • Warranty:

    Limited 6 Year Warranty on Tank and Parts

Pros

  • Highly efficient
  • Space-saving and compact design
  • Backed by a limited 6-year warranty
  • Durable and long-lasting
  • Ideal for small families, trailer homes, or RVs
  • Does not require batteries to operate

Cons

  • Single heating element

Our Verdict

A.O. Smith EJC-6 is an excellent residential heater for small households. Although it only has a single heating element, it does its job fairly well. In addition, it is backed by 6 years warranty on water tanks and spare parts.

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A.O. Smith GCR-40 ProMax Plus Water Heater

Top Pick for Space-Saving Design

Features Highlights

  • Blue Diamond glass coating to block scale formation
  • Equipped with internal microprocessor
  • Meets the standards of National Appliance Energy Conservation Act (NAECA)
  • DynaClean diffuser dip tube maximizes output and reduces sediment buildup
  • LED status indicator to monitor the operation
GCR-40 ProMax Plus is engineered to provide optimum performance with long-lasting values while also minimizing your energy bills. Check Price on Amazon

Product Specification

  • Dimensions:

    22 x 22 x 58.5 inches

  • Weight:

    165 pounds

  • Flow Rate:

    6 Gallons Per Minute

  • Voltage:

    120 Volts

  • Material:

    Stainless Steel

  • Warranty:

    Limited 6 Year Warranty on Tank and Parts

Pros

  • Blue Diamond glass coating
  • Advanced DynaClean Diffuser Dip Tube
  • Low NOx Emission
  • Has an internal microprocessor
  • LED status indicator

Cons

  • Not Energy Star rated
  • Bulky in size

Our Verdict

A.O. Smith GCR-40 ProMax Plus is designed to deliver the most economical performance with a first-hour rating of 70 gallons at 41 GPH recovery rate. Although this unit is not Energy Star qualified with 0.62 Energy Factor, it meets the requirement of Low NOx emission. This means the water heating system can certainly reduce energy consumption and lower your energy bills. In addition to that, it comes with a 6-year limited warranty on tank and spare parts.

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Comparison Table for A.O. Smith Water Heaters

SNProduct NameDimensions (inches)Weight (pounds)MaterialFlow Rate (GPM)Voltage (Volts)Warranty
1A.O. Smith ATI-540H-N Tankless Heater 12.5 x 18.5 x 29.559Commercial-Grade Copper1012015 Years Limited Heat Exchanger Warranty and 5 Years Limited Parts Warranty
2A.O. Smith BTR-200 Water Heater 30.2 x 30.2 x 72630Stainless Steel8120Limited 3 Years Warranty
3A.O. Smith ATI-510-N Tankless Heater9.5 x 13.8 x 20.239HRS35 Copper Alloy1012012 Years on Heat Exchanger and 5 Years on Parts
4A.O. Smith EJC-6 Water Heater14.2 x 14.2 x 15.225.6Commercial-Grade Copper6120Limited 6 Year Warranty on Tank and Parts
5A.O. Smith GCR-40 ProMax Plus Water Heater22 x 22 x 58.5165Stainless Steel6120Limited 6 Year Warranty on Tank and Parts

FAQs on A.O. Smith Water Heaters

Although accidents are rare when it comes to water heaters, A.O Smith does not compromise even for rare incidents. The water heating systems by A.O. Smith is equipped with a thermal cutout technology that simultaneously cuts off the live and zero line. This means the system automatically cuts off the supply of electricity if the temperature of the water exceeds the highest pre-set limit.
In addition, they also feature a safety valve, which relieves and discharges water if the water temperature or water pressure overshoots the pre-set limits. In such cases, the safety valve discharges the water by opening up through the drainage.

When it comes to quality and performance, A.O. Smith is one of the best names in the market for water heaters. All the heating elements used in A.O. Smith water heaters are glass-coated. This premium glass coating helps to prevent scaling and extend the lifespan of the water heater.
Additionally, A.O. Smith also manufactures water heaters with dual heating elements. These units are much faster and highly efficient. Also, if one of the heating elements fail to operate, the other one works as a backup to ensure you get the hot water all the time.
The company provides a minimum of two years warranty for the heating element, which can also be extended if you register it in the first two months of purchase. This is one of the longest warranty periods you will get in the water heaters industry.

No, only a few selected water heating models include remote control on the set. For others, you have to buy the remote control separately. A.O. Smith offers a wide range of units that comes with corded as well as wireless remote and user-friendly settings.
The digital display comes in handy to set the water temperature, quick heating mode, real-time clock, and power options. In addition, it also indicates the actual water temperature inside the unit and the amount of electricity consumed by the system. These water heaters also come with a built-in LCD with user-friendly controls.

The inner container of water heaters manufactured by A.O.Smith is built with a heavy gauge mild steel and premium Blue Diamond technology. With sturdy construction and high-quality materials, these units are built to last for years. Besides, the water tank of A.O. Smith water heaters come with a 5 to 7 years warranty. Quick useful tips: If you're using your water heater for a long time and unknown about the age of your product, you can simply follow these guideline on how to determine the age of a water heater.

A.O. Smith Water Heaters are extremely stylish and well designed with glossy and sheeny outer cover. While the color options depend upon the country you come from, they do offer you a ColourMatch System. With this system, you can match the color of your water heater with the bathroom. A.O. Smith appliances mostly come in ivory or white outer with decorative front panels. Also, these outer can be easily changed in eight different colors.

Conclusion

Well, that’s all regarding the best A.O. Smith water heaters available in the market. I hope this article has helped you choose the right A.O Smith water heater for your home. All the water heaters mentioned on this list are engineered to deliver high performance and an endless supply of hot water. Cheers!

In Hurry? Editor's Choice
A.O. Smith ATI-540H-N