The best A.O. Smith water heater depends heavily on your household energy source, but the A.O. Smith Voltex Hybrid Electric Heat Pump Water Heater is widely recognized as the premier choice for maximum energy efficiency. By pulling ambient heat from the surrounding air to warm the water, it slashes annual electricity consumption by up to 70 percent compared to standard electric resistance tanks, earning top energy-saving ratings and qualifying for federal tax credits. For natural gas applications, the A.O. Smith ProLine XE Condensing Tankless or commercial-grade power-vent tank systems stand out as the top choices for endless hot water, smart-home integration, and long-term durability.
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