AO Smith has been a trusted name in water heaters since Founded 1874, based in United States. The brand is particularly known for Industry-leading water heaters including the Vertex high-efficiency line, Cyclone commercial series, and pioneering heat pump water heaters. AO Smith is positioned in the mid-range price tier, making it a solid mid-range option for water heaters.
AO Smith Water Heaters
A. O. Smith is an industry leader offering a complete range of residential and commercial water heaters including tank, tankless, heat pump, and solar models. Their Vertex line achieves up to 96% thermal efficiency, and the Cyclone series is a commercial workhorse. ProLine and Signature series cover standard residential needs with strong warranty support.
Mid-RangeBalanced quality and affordability
AO Smith Water Heaters Product Lines
ProLineProLine XESignature SeriesVertexCycloneDERAVoltex (Heat Pump)
Why Choose AO Smith for Water Heaters?
AO Smith stands out in the water heaters market because of Industry-leading water heaters including the Vertex high-efficiency line, Cyclone commercial series, and pioneering heat pump water heaters. Their products carry 4 industry certifications, including Energy Star, UL Listed, NSF Certified, giving homeowners confidence in quality and compliance. AO Smith backs their water heaters with a 6-year standard warranty on residential models; 10-year on select ProLine series; commercial warranties vary by model, which shows commitment to long-term reliability. With 7 dedicated product lines — ProLine, ProLine XE, Signature Series, Vertex, and more — there's a AO Smith option for virtually every need and budget.
Certifications & Standards
Energy StarUL ListedNSF CertifiedCSA Certified
Warranty & Support
Warranty6-year standard warranty on residential models; 10-year on select ProLine series; commercial warranties vary by model
Phone Support1-800-527-1953
Official Websitehttps://www.hotwater.com
Where to Buy AO Smith Water Heaters
Water Heaters How-To Guides
View All →How to Adjust Water Temperature
Set your gas or electric water heater thermostat to the right temperature for comfort, safety, and lower energy bills -- plus how to verify the actual output with a thermometer.
How to Choose the Right Size Water Heater
Calculate the right water heater size so you never run out of hot water -- covers first-hour rating for tanks, GPM for tankless, quick sizing charts, and the mistakes that leave people taking cold showers.
How to Flush Your Water Heater
Flush sediment from your tank water heater to cut energy bills, eliminate rumbling noises, and add years to its life -- the most important maintenance task most homeowners skip.
Common Water Heaters Problems
View All →Leaking Water Heater
Water around the base demands immediate attention -- floor damage, mold, electrical hazards. Could be loose fittings, a failing T&P valve, a bad drain valve, or a rusted-through tank that needs replacement.
No Hot Water
No hot water from any fixture? Cause depends on gas vs. electric. Common culprits: pilot light out, tripped breaker, failed element, faulty thermostat or gas valve.
Pilot Light Won't Stay Lit
Lights but will not stay lit? Almost always the thermocouple -- a safety sensor that detects the pilot flame. When it fails, the gas valve shuts off. Straightforward DIY repair, under $25.
Water Heaters Types
View All →Water Heaters Buying Guides
View All →AO Smith Water Heaters FAQ
Is AO Smith a good brand for water heaters?
A. O. Smith Corporation is one of the world's leading manufacturers of residential and commercial water heating equipment, headquartered in Milwaukee, Wisconsin since its founding in 1874. The publicly traded company (NYSE: AOS) has grown through strategic acquisitions to own major brands including State Water Heaters, Lochinvar, Takagi, Reliance, and Aquasana. A. O. Smith also operates one of the largest water treatment businesses globally, with significant market presence in North America, China, and India.
What warranty does AO Smith offer on water heaters?
AO Smith offers 6-year standard warranty on residential models; 10-year on select ProLine series; commercial warranties vary by model.
Where is AO Smith made?
AO Smith is based in United States, headquartered in Milwaukee, Wisconsin.
What price range does AO Smith water heaters fall into?
AO Smith is positioned in the mid-range price tier for water heaters. They balance quality and affordability well.
What water heaters product lines does AO Smith offer?
AO Smith offers 7 water heaters product lines: ProLine, ProLine XE, Signature Series, Vertex, Cyclone, DERA, Voltex (Heat Pump).
What certifications does AO Smith have for water heaters?
AO Smith holds 4 certifications including Energy Star, UL Listed, NSF Certified.
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