Residential Water Heating
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.
Tankless with X3® Scale Prevention Technology
Our Gas Tankless Water Heaters with X3® Scale Prevention Technology require no scale related maintenance, and offer three times longer life compared to standard tankless.
Protect your closed loop system with a pressure tank.
Parts & Accessories
Find all the parts and accessories for your water heater.
Water Heater Resources
Interactive tools, product manuals, warranty information, the A. O. Smith mobile app, and more.