10 Best Air Conditioners Air Conditioners 2025 in the United States

The BLACK+DECKER Smart Portable Air Conditioner with Heat is a versatile unit designed for rooms up to 700 sq. ft. Its cooling capacity is notable at 14,000 BTU ASHRAE (10,000 BTU DOE), making it suitable for large spaces. Additionally, it offers 12,000 BTU heating, which is great for year-round use. The unit stands out with its four-in-one functionality: air conditioning, heating, dehumidifying, and fan modes.

The Energy Efficiency Ratio (EER) is relatively low at 6.2, suggesting that it may not be the most energy-efficient option available. This could lead to higher electricity bills over time, particularly with regular use. Noise levels are at a moderate 54 dB, which is comparable to a quiet conversation; this should be manageable for most users, but noise-sensitive individuals may want to take note. The portability of this unit is a significant advantage, allowing users to move it easily between rooms.

The smart features, including Wi-Fi connectivity and compatibility with Amazon Alexa and Google Assistant, offer convenient control options. The 'Follow Me' remote control enhances user experience by allowing precise temperature settings. An included installation kit simplifies the setup process, making it user-friendly. Weighing 35 pounds, it is reasonably easy to handle but might require some effort to move frequently. This BLACK+DECKER model is best suited for those looking for a multi-functional, portable air conditioning solution with smart features and who are less concerned about energy efficiency.

The Daikin 18,000 BTU Multi-Zone Mini Split is designed to cool and heat two separate rooms independently, making it a great choice if you want personalized comfort in different areas of your home. Its cooling capacity of 18,000 BTU (split as 9,000 BTU per zone) is suitable for spaces around 800 square feet, which fits well for medium-sized rooms or combined smaller rooms. The unit stands out with high energy efficiency, boasting a 21 SEER2 rating and using the eco-friendly R-32 refrigerant, which helps save on electricity while being better for the environment. Noise level is impressively low at just 24 decibels, so it operates quietly without disturbing your daily activities or sleep.

This system uses an inverter compressor, which adjusts power smoothly for both cooling and heating, improving comfort and efficiency throughout the year. Additional features like Wi-Fi control via an app or voice commands, air purification with a titanium filter, and automatic functions for humidity and diagnostics make it convenient and user-friendly. Installation kits and wall brackets are included for easier setup.

A notable point is that it is not Energy Star rated, so some other models might offer higher official energy certifications. Also, being a split system, professional installation is required, which can add to the cost. While it covers moderate cooling and heating needs well, very large homes or multiple bigger rooms might require a more powerful or additional unit. If you want a quiet, efficient, and flexible air conditioner that provides year-round comfort for two rooms without ductwork, this Daikin mini split is a solid option.

The Midea 12,000 BTU U Shaped Smart Inverter Window Air Conditioner is well-suited for cooling medium-sized rooms up to 550 square feet. Its cooling power is strong enough for typical living spaces, while the 15 SEER rating and ENERGY STAR certification reflect its energy efficiency, which promises more than 35% savings compared to older models. One standout feature is its ultra-quiet operation at just 32 decibels, thanks to the unique U-shaped design that fits into the window and blocks outside noise. This makes it great for bedrooms or offices where low noise is important. The smart inverter technology also helps keep electricity use in check. The unit offers smart controls via Wi-Fi and voice assistants like Alexa and Google Assistant, making it easy to adjust settings remotely. Another nice touch is the U-shaped design that allows you to keep your window open for fresh air and natural light while the AC runs, an uncommon feature in window air conditioners.

Setup is straightforward with the included mounting bracket compatible with most single or double-hung windows. On the downside, this model weighs close to 59 pounds, which might require some help during installation. It uses R-32 refrigerant, a more eco-friendly option, but the noise level, although low, may still be noticeable if you are extremely sensitive to sound. Additionally, while it covers a good-sized area, it might be less ideal for very large rooms or whole-house cooling. This unit represents a solid choice for those seeking an energy-efficient, quiet, smart-controlled window AC with flexible window use and good cooling capacity for rooms around 500 square feet.