It manufactures tankless, hybrid, solar, and high-efficiency tank water heaters. GE General Electric makes gas and electric water heaters.

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High-efficiency water heaters typically cost more than old-fashioned tank heaters, and installation costs can also be high if you’re switching to an entirely new type of water heater.

But high-efficiency water heating technology exists in the form of heat pump water heaters. These heat pump water heaters don’t waste time burning gas to heat water.

High-efficiency water heaters typically cost more than old-fashioned tank heaters, and installation costs can also be high if you’re switching to an entirely new type of water heater.

A.O. Smith is a pioneer in water heating and water treatment solutions (the brand celebrates 150 years in business in 2024), so it’s no surprise it gets high marks from experts.

The U.S. Department of Energy reports a tankless water heater is 24% to 34% more energy-efficient than storage tank water heaters—as long as you use around 41 gallons per day.

Look for a high-efficiency water heater with a “coefficient of performance” of 3.0 or higher. Make sure your water heater and other water-using appliances are Energy Star certified.

Question: I changed over from a gas water heater to electric some years ago. It was done at the time that I replaced my gas furnace with a high efficiency unit.