10 Best Room Air Conditioners 2025 in the United States

The BLACK+DECKER Smart Portable Air Conditioner with Heat offers a versatile solution for year-round comfort. It boasts a cooling capacity of 14,000 BTU (ASHRAE) and 10,000 BTU (DOE), which is suitable for rooms up to 700 sq. ft. This makes it a solid choice if you need to cool a large space. Additionally, it provides 12,000 BTU heating, making it useful in winter as well. The unit features a 6.2 SEER rating, which is not very high, meaning it is not the most energy-efficient option available.

Its noise level is 54 dB, which is relatively moderate and should not be overly disruptive in most settings. As a portable unit, it offers flexibility in placement, which is convenient if you need to move it between rooms. Installation is simplified with the included window kit and vented airflow outlet. Smart features like Wi-Fi connectivity, mobile app control, and compatibility with Amazon Alexa and Google Assistant add a modern touch to this device, making it easy to control remotely.

The 'Follow Me' remote option, which uses the remote as a thermostat, allows for more precise temperature control. However, it is worth noting that this model is not Energy Star rated, which might be a consideration if energy efficiency is a priority for you. The unit also functions as a dehumidifier and fan, adding to its versatility. It is a well-rounded air conditioner with some notable smart features, though its energy efficiency could be better.

The BLACK+DECKER 10,000 BTU Portable Air Conditioner is designed for rooms up to 450 sq. ft., making it a good choice for medium-sized bedrooms or living spaces. Its cooling capacity at 10,000 BTU is solid for this size, but note that the effective seasonal cooling (SACC) is lower at 5,800 BTU, which may affect efficiency in very hot conditions. The unit has a respectable Energy Star 5-star rating and a SEER of 6.7, meaning it will be reasonably energy-efficient compared to some older models, helping to keep electricity bills in check. Noise-wise, it runs at about 52 dB, which is fairly average for portable ACs—noticeable but not too disruptive during daily use or sleep.

Installation is straightforward with the included window kit, and thanks to built-in wheels and handles, the unit is easy to move between rooms without much hassle. The 3-in-1 functionality means it can also act as a fan and a dehumidifier, adding extra comfort on muggy days. The washable slide-out filter is a practical feature for easier maintenance and improving air quality.

It comes with a remote control and a 24-hour timer for convenience, though it lacks smart home connectivity features, so it won’t integrate with voice assistants or mobile apps. This BLACK+DECKER portable AC offers solid cooling, decent energy efficiency, and useful features for easy setup and operation, making it a strong option for those needing flexible cooling without advanced smart controls.

The Senville LETO Series Mini Split Air Conditioner Heat Pump stands out with its impressive 12000 BTU cooling capacity, making it suitable for cooling larger rooms or spaces. Its SEER2 rating of 20.8 indicates high energy efficiency, helping to reduce electricity bills. The integration with Alexa offers convenient smart features, allowing for voice control and remote operation, which is a major plus for tech-savvy users or those seeking modern conveniences.

Additionally, the unit functions as a versatile 4-in-1 system, including air conditioning, heating, dehumidifying, and fan modes, catering to various needs throughout the year. The inverter technology further enhances efficiency and performance, while the installation package includes all necessary components for setup, although professional installation is required. The 5-year warranty on parts and the compressor adds value by providing long-term reliability and support.

However, the unit's noise level is not specified, which may be a consideration for those sensitive to sound. It's also worth noting that the product is not Energy Star compliant, which might be a drawback for those looking for certified energy-saving options. Despite these minor drawbacks, the Senville LETO Series offers a stylish and functional solution for both residential and commercial settings, combining performance with aesthetic appeal.