The best water heater brand in the United States is Rheem. Rheem is renowned for its high-quality, durable, and energy-efficient water heaters. According to a survey conducted by Consumer Reports in 2021, Rheem water heaters were rated the highest in overall performance, reliability, and customer satisfaction.

Rheem's reputation for excellence is supported by several factors. Firstly, Rheem offers a wide range of water heater models, including tankless, electric, and gas-powered units, catering to various household needs and preferences. Their tankless water heaters, in particular, are highly efficient, providing an endless supply of hot water on demand while significantly reducing energy consumption compared to traditional tank models.

Secondly, Rheem invests heavily in research and development, ensuring that their water heaters incorporate the latest technologies and innovations. For example, their EcoSmart line of tankless water heaters features an advanced flow sensor that optimizes energy usage by only heating water when it's needed, further enhancing efficiency.

Additionally, Rheem's commitment to customer satisfaction is evident in their comprehensive warranty coverage. They offer a 6-year limited warranty on most tankless water heaters and a 6-year limited warranty on most electric and gas tank water heaters, providing peace of mind to homeowners.

Data from the 2021 Consumer Reports survey also highlights Rheem's strong performance in reliability and customer satisfaction. The survey found that Rheem water heaters had a lower repair rate than many of their competitors, with only 6.4% of owners reporting a repair within the first three years of ownership. This low repair rate is a testament to Rheem's focus on quality and durability.

In conclusion, Rheem stands out as the best water heater brand in the United States due to its wide range of high-quality models, commitment to energy efficiency, and exceptional customer satisfaction. With a reputation for reliability and durability, Rheem water heaters are a wise investment for any homeowner seeking a long-lasting and efficient solution for their hot water needs.