The best three-horsepower model of Gree in the United States is the Gree GWH18X60A3N1. This model stands out due to its exceptional energy efficiency, advanced cooling capabilities, and user-friendly features.

The Gree GWH18X60A3N1 is highly efficient, achieving an Energy Star rating, which indicates its superior energy performance compared to other models. According to the Energy Star website, this rating is based on the product's energy consumption and its ability to save money on utility bills. The model's energy efficiency is further supported by its SEER (Seasonal Energy Efficiency Ratio) of 18, which is higher than the minimum standard set by the U.S. Department of Energy.

In terms of cooling performance, the Gree GWH18X60A3N1 is equipped with a powerful compressor and a variable-speed indoor fan, allowing it to cool large spaces quickly and effectively. The model also features a multi-speed outdoor fan, which optimizes energy use by adjusting the fan speed to match the cooling demand.

Additionally, the Gree GWH18X60A3N1 offers a range of user-friendly features that enhance comfort and convenience. These include a programmable timer, a sleep mode, and a remote control. The programmable timer allows users to set the unit to turn on or off at specific times, while the sleep mode gradually increases the room temperature to a more comfortable level during the night. The remote control provides easy access to all the unit's functions, making it convenient to adjust the settings from a distance.

In conclusion, the Gree GWH18X60A3N1 is the best three-horsepower model of Gree in the United States due to its high energy efficiency, strong cooling performance, and user-friendly features. Its Energy Star rating and high SEER value demonstrate its commitment to energy savings, while its advanced technology and convenient features make it an excellent choice for homeowners seeking a reliable and efficient cooling solution.