10 Best Air Conditioners 2025 in the United States

The LG 24,500 BTU Smart Window Air Conditioner is a strong option for cooling large rooms up to about 1,560 square feet, making it suitable for spacious bedrooms, living rooms, or small apartments. Its high cooling capacity means it can handle bigger spaces better than many smaller units. The unit is equipped with LG ThinQ technology, allowing you to control it remotely via your smartphone, and it works with voice assistants like Amazon Alexa and Google Assistant, which is convenient if you want smart home integration. It offers 3 fan speeds and a 24-hour timer, giving you flexibility to customize cooling and save energy when it's not needed.

Noise levels are generally reasonable, around 61 dB, which is about as loud as a normal conversation; the lowest mode can run quieter at 50 dB, so it won't be too disruptive during sleep or work. While the Seasonal Energy Efficiency Ratio (SEER) is 10.3, which is decent but not top-tier, this means it balances performance with energy use moderately well but might not be the best choice if you want to minimize electricity bills aggressively. The window installation kit and remote control come included, making setup straightforward. A minor downside is its size and weight (132 pounds), so installation may require some help.

It also includes helpful features such as a filter reminder light and automatic restart after power failures, adding convenience. This model serves well as a smart window AC for those needing powerful cooling with modern controls, but if noise sensitivity or the absolute best energy efficiency is your priority, you might want to explore other options.

The Senville LETO Series Mini Split Air Conditioner Heat Pump offers a substantial cooling capacity of 12,000 BTU, making it suitable for cooling medium-sized rooms. One of its standout features is the high Seasonal Energy Efficiency Ratio (SEER) of 20.8, which indicates it operates efficiently and could help reduce electricity bills. The inclusion of a DC Inverter further enhances its energy efficiency and performance consistency.

This model supports voice control through Alexa, allowing for convenient adjustments via app or voice commands from anywhere, which could be appealing to tech-savvy users or those who enjoy smart home integration. Additionally, it serves multiple roles as an air conditioner, heat pump, dehumidifier, and fan, making it versatile for year-round use. The unit operates relatively quietly, which is ideal for bedrooms and living areas where noise can be disruptive.

It does require professional installation, which might add to the initial cost. Although it comes with a comprehensive 5-year warranty on parts and the compressor, labor costs for installation are not covered. The product does not meet Energy Star compliance, which might be a consideration for eco-conscious buyers. Its compact and stylish design allows it to blend into both residential and commercial settings without compromising aesthetics. The package includes necessary installation components, making it convenient, but the pre-loaded refrigerant accommodates only up to 25 ft, which could limit installation flexibility in larger spaces.

The COSTWAY 12000BTU Mini Split Air Conditioner & Heater is a versatile choice if you need a ductless unit that can cool and heat spaces up to about 750 square feet. Its cooling power of 12,000 BTU and 1-ton capacity make it a good fit for medium-sized rooms like living rooms or large bedrooms. One of its best features is high energy efficiency, with a SEER rating of 20 and an EER of 10, meaning it can help keep electricity bills lower compared to less efficient models. It uses eco-friendly R32 refrigerant, which is better for the environment than older types. The inverter technology helps the compressor run smoothly without frequent on/off cycles, saving energy and reducing wear. Noise level is reasonably low at 51 decibels, so it won’t be too disruptive during use.

You get five modes including cooling, heating, dry, fan, and auto, plus multiple fan speeds and extra settings like sleep mode, turbo, and ECO mode, giving good flexibility for all seasons. The unit also features a self-cleaning function and washable filter, which helps maintain air quality and reduces maintenance. However, installation requires a licensed HVAC professional, so you should factor in that cost and effort. The system’s size and necessary outdoor unit might also need enough wall space.

With a solid 5-star energy rating and a strong manufacturer warranty covering parts and compressor, this model offers reliable performance. If you want an energy-saving, quiet, year-round solution for a medium-sized room and don’t mind professional installation, this mini split is a practical option to consider.