Find residential and commercial tankless models, hybrid heat pumps and storage tanks. Explore A. O. Smith's line of gas and electric water heaters.

When it comes to high efficiency water heaters, no one comes close to matching our expertise. Whether it’s a gas, electric or tankless water heater, the inventive minds at A. O. Smith have you covered.

A. O. Smith's 40-gallon gas water heater provides efficient and reliable hot water for households with 3 to 4 people when sized appropriately. With an environmentally-friendly 40,000 BTU Low NOx gas burner, this model delivers 74 gallons of hot water in the first hour.

A. O. Smith manufactures ENERGY STAR® certified water heaters, including pressure tanks, parts and accessories to ensure you have a steady supply of hot water when you need it. Choose a gas or electric, tank or tankless, hybrid heat pump, or combi boiler by using our convenient Product Selector Tool to choose the right product for your home.

Replace your home’s old, inefficient water heater with an A. O. Smith ENERGY STAR® Certified model. Choose a gas or electric tank or tankless, hybrid heat pump, or combi boiler to enjoy a steady supply of hot water whenever you need it.

We supply hybrid water heating systems for the industrial and commercial market that use various technologies such as electric, gas-fired, heat pump technology and solar energy.

Heating water has never been more efficient with an electric tank water heater from the A. O. Smith Signature Series®. Discover the cost savings for yourself.

Find A.O. Smith Electric water heaters at Lowe's today. Shop water heaters and a variety of plumbing products online at Lowes.com.

Learn about Signature Series® water heaters from A. O. Smith. Find out which filter you need, register your product or research water heaters before shopping.

A.O. Smith Signature 900 50-Gallon Tall 10-Year Warranty 240-Volt Smart Hybrid Heat Pump Water Heater with Leak Detection & Automatic Shut-Off