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Info Center

Trust the water heater experts. For more than 145 years, A. O. Smith has been committed to delivering innovative solutions that bring comfort to your home or business. 

When to Repair or Replace a Water Heater?

Learn about diagnosing repairs and learn the signs that it’s time to replace your water heater.

Cutaway of the Adapt Condensing Gas Tankless Water Heater

Learn About High-Efficiency Condensing Gas Tankless Water Heaters

Engineered to deliver continuous hot water when you need it

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Learn About Hybrid Heat Pump Water Heaters

A. O. Smith high-efficiency hybrid electric heat pump water heaters have 4x more efficiency using heat pump technology compared to standard tank units.

Know Before You Purchase a Water Heater

Why Water Heater Size Matters

Consider what size of water heater is best for your needs. Review the factors you’ll need to weigh before making a decision.

Water Heater Reviews

A. O. Smith is a leading manufacturer of commercial and residential water heaters. Hear what some of our customers have to say about their products and experiences with us.

How Water Quality Affects Water Heaters

How can the quality of your water affect your water heater? Get tips and more information on water hardness, why it matters, and how to solve it.

Uniform Energy Factor (UEF)

The Uniform Energy Factor (UEF) is the Department of Energy’s latest metric for communicating the energy efficiency of residential water heaters.

Water Heater Venting

Having the correct venting for your gas water heater is vital to ensure the hot exhaust exits your home.

LEED Certification

Leadership in Energy and Environmental Design (LEED) certification provides independent, third-party verification that a building project meets the highest energy-efficient building and performance measures.

Tankless vs Tank Water Heaters

While you have plenty of options when choosing a new hot water heater, one of the biggest decisions you need to make is whether to go with a traditional tank heater or opt for a modern, efficient tankless water heater.

How Long Do Water Heaters Last?

In this comprehensive guide, we explore the factors that determine your water heater lifespan, the signs that indicate the end could be near, and how to choose the right installer and system to suit your needs.

Water Heater Replacement Cost

In this guide, we talk about the different types of A.O. Smith water heaters, water heater costs and factors that influence the total cost of hot water heater replacement.

FOR PROS: Water Heater Installation

Tank Water Heaters and Safety

Discover the innovative design features A. O. Smith engineers use to keep water heaters both functional and safer for everyday use.

Water Heater Venting

Having the correct venting for your gas water heater is vital to ensure the hot exhaust exits your home. Learn what different venting options exist.

Water Heater Installation

Learn what it takes to replace your water heater and why professional help with installation can save you time, frustration and, most of all, money.

Tankless Water Heater Installation

Learn what it takes to replace your water heater with a Tankless and why professional assistance can save you time, frustration, and money.

FOR PROS: Water Heater Maintenance

Water Heater Repair

Before you start troubleshooting a hot water heater repair, consider common issues and seek professional help if you don't feel comfortable doing it yourself.

How to Maintain a Water Heater

Proper preventative maintenance on a water heater can ensure that your unit lasts, saving the hassle and expense of a premature replacement.

How To Drain (Flush) a Water Heater?

Flushing your water heater removes sediment and helps prevent several common plumbing issues. Learn how this is completed with the correct tools and knowledge.

Water Heater Pilot Light Keeps Going Out (Won't Stay Lit)

Is it dangerous if the pilot light goes out on a water heater? And what should you do if the pilot goes out?

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Technical Bulletins

Instant access to A. O. Smith technical bulletins for troubleshooting, covering water conditions, noisy water heaters, temperatures, leaking and more.

Product Support, Literature & Videos

Get access to the latest product support resources, including literature, images & videos.


Browse A. O. Smith Corporation’s latest news, case studies and more.

Why A. O. Smith?

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.

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.

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 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