Water heaters

High Efficiency Condensing Gas Tank Water Heaters

A. O. Smith’s line of high efficiency condensing gas tank water heaters are the high performance answer for your hot water needs. These models are built to save energy with a helical heat exchanger to maximize efficiency and distribute heat more evenly than standard gas water heaters.

Rebates & Tax Credits

Up to $850 in Local Utility Rebates may be available in your area!

*Gas water heaters with UEF of 0.82 or higher OR with a thermal efficiency of at least 90%. Local utility rebates available in limited geographical areas. For information on the Federal Tax Credit, go to: energystar.gov. Check with your tax advisor for applicability. Offer details and expiration may vary. See Rebate Center for details.

What Our Customers Are Saying

Benefits of High-Efficiency Gas Tank Water Heaters

Woman bathing dog

Energy Savings

High-efficiency condensing gas tank water heaters save energy and reduce the cost of operation by transferring more heat into the water.

Father bathing child in tub

High Efficiency

A. O. Smith high-efficiency condensing gas tank water heaters use less energy through better insulation, heat traps, more efficient burners and heat exchangers.

Mother and child washing hands at the sink

Long Lasting

A. O. Smith high-efficiency condensing gas tank water heaters are built to last with limited warranties that range from 6 to 10 years to ensure that your home has hot water for years to come.

How it Works

Water heaters

What is a high-efficiency condensing gas tank water heater?

A. O. Smith high-efficiency condensing gas tank water heaters operate using the same technology as a standard gas storage water heater and are just as easy to install. The water heater maintains a tank of hot water available for immediate use. As hot water is drawn out of the tank, it is refilled with cold water. The electronic controls monitor the water temperature and reheat the tank when necessary.


The primary difference is that the high-efficiency condensing gas tank water heaters are designed to transfer and retain more heat into the water than a standard gas water heater. This reduces the amount of wasted heat and reduces total energy use.

Still Have Questions?

Natural gas is supplied to many homes in the United States by way of underground piping. Liquid Propane (LP) is used mostly in rural areas of the country, where natural gas is not available. LP gas is usually stored in large tanks that sit in your yard. The gas is delivered to your home in a tanker truck and pumped into the tank sitting in the yard. Most A. O. Smith gas water heaters are available from the factory in either gas type liquid propane or natural gas. Both fuel sources can provide consistent hot water for your home.
A. O. Smith high-efficiency gas tank water heaters are built similarly to standard gas tank water heaters with some modifications for higher efficiency and performance. The high-efficiency models are built with helical internal heat exchanger that keeps hot combustion gasses in the tank longer to transfer more heat into the water, increasing efficiency and reducing operating cost. These models generally have higher BTU/H inputs, which means the heater can deliver more hot water.
The A. O. Smith line of high-efficiency condensing gas tank water heaters come in a range of gallon sizes and BTU/H burners. Sizing a water heater is not just dependent on the amount of water that it can store at once, but also depends on the maximum BTUs the gas burner can utilize. A. O. Smith has condensing gas tank water heaters that range from a 34- to 75-gallon (nominal) tank capacity and 76,000 BTU/H to 199,000 BTU/H. We recommend that you use the A. O. Smith online XPERT™ Product Selector to determine the exact water heater needs for your home.
Before purchasing a high-efficiency gas tank water heater, you should understand what type of fuel you currently have in your home, how much hot water you use on a daily basis, and where your current water heater is installed. A condensing water heater generally uses a different type of venting and requires a floor drain to dispose of condensate. A plumbing contractor can assist in helping you choose a water heater that fits your needs, or you can use the A. O. Smith online XPERT™ Product Selector to help determine which water heater is best for your home.

Product Comparison

 
ProLine
ProLine XE
 
Standard Non-Condensing Gas Tank Water Heater
High-Efficiency Condensing Gas Tank Water Heater (Vertex & Polaris)
 
Standard Non-Condensing Gas Tank Water Heater
High-Efficiency Condensing Gas Tank Water Heater
 
GCR-50
 
Single Shower Length
37 minutes
Unlimited
Showers Back-to-Back
4.7 showers
Unlimited
Showers at the Same Time
3.2 showers
3.5 showers
Maximum Tub Size
87 gallons
112 gallons
Time to Fill Tub
7 minutes
7 minutes
Hot Water Storage Supply
X
X
Continuous Hot Water
 
X
Energy Efficiency
 
X
UEF
0.62
0.88 - 0.90
Warranty
6 Years
6 - 10 Years

*Many factors affect the actual performance of a water heater. This represents our closest approximation of your likely experience with this water heater in your local area, but actual performance may vary depending on factors beyond our ability to control or estimate.

man working on water heater

Find A Local Water Heater Pro

A. O. Smith water heaters are professionally installed by local independent contractors.

Featured High-Efficiency Gas Tank Water Heaters

  • ENERGY STAR® certified
  • 100-gallon first hour rating
  • 6-Year Warranty
  • 150,000 BTU input
  • 190-gallon recovery rate
  • 10-Year Warranty
  • 150,000 BTU input
  • 190-gallon first hour rating
  • 10-Year Warranty
  • ENERGY STAR® certified
  • 130-gallon first hour rating
  • 6-Year Warranty
customer using phone

Not sure which product is right for you?

Take our water heater selector quiz to find the correct water heater for your home.

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Why A. O. Smith?

 
market_leader
Market Leader

A. O. Smith is a leading manufacturer of both residential and commercial water heating technologies, including the #1 most specified commercial water heater.

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Commitment to Innovation

For more than 145 years, we’ve developed state-of-the art products that push new boundaries and improve the lives of our customers.

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Best-In-Class Support

We combine cutting-edge technology with committed people who take pride in providing the very best support for our customers.

unmatched
Unmatched Quality

Our products are put through rigorous quality and endurance testing so now matter where hot water is needed, A. O. Smith can provide a solution you can count on.

Learn more about A. O. Smith