A.O. Smith has building some of the top water heaters since 1953. They have a complete line up of conventional water heaters, tankless water heaters, solar water heaters and hybrid water heaters. They offer both a commercial and residential line. Like Bradford White Corp, they also only sell exclusively to plumbing wholesalers and plumbing contractors, however we were able to locate a few online dealers which will sell to the public.
A.O. Smith has full lineup of condensing and non-condensing models. The also offer models for indoor and outdoor installation. Regardless of your hot water needs, they have you covered, with models ranging from 140,00 BTU to 199,000 BTU maximum output.
All models include freeze protection. They also have (most models) with built in surge protection and over heat protection. Condensing models have have a stainless steel secondary heat exchanger, which provides additional protection against corrosion.
All residential models are qualified for ENERGY STAR. Condensing models have a 0.91 energy factor making them light on your wallet to operate. A.O.Smith offers a 12 year limited warranty on the heat exchanger and 5 years on parts.
One of the nice features that we do not see to often, is some of their models can be used for hydronic heating applications. This means you can have one unit used to supply your hot water and the same unit can used to supply hot water for radiant heat.
Current A.O. Smith Tankless Water Heater Reviews: