10 Best 24000 BTU Air Conditioning Units 2026 in the United States

The Senville LETO Series Mini Split Air Conditioner Heat Pump offers a robust 24,000 BTU capacity, making it suitable for cooling or heating spaces up to 1250 square feet. It stands out with its SEER rating of 17, indicating decent energy efficiency, although it is not Energy Star compliant. This model's low noise level of 34 dB is commendable, ensuring a quiet operation which is ideal for bedrooms or living areas. One of its significant advantages is the integration with Alexa, allowing for convenient voice control and remote operation via an app.

The unit also provides versatile functionality with its 4-in-1 capabilities: air conditioning, heating, dehumidifying, and fan modes. The inclusion of a DC Inverter enhances its efficiency and performance, and it is both UL Listed and AHRI Certified for reliability. The installation package comes with all necessary components including a 16-foot line set, which is convenient, though professional installation is required, potentially adding to the cost.

The design is both stylish and functional, fitting well into various environments from residential to commercial settings. However, the product is imported from China, which may be a consideration for some buyers. Additionally, while the warranty covers 5 years on parts and the compressor, labor is not included, which could be a disadvantage if repairs are needed. This unit is a solid choice for those needing a powerful and versatile air conditioning solution.

The LG 24,500 BTU Window Air Conditioner is a powerful unit capable of cooling spaces up to 1,560 square feet, making it suitable for large rooms like bedrooms, living rooms, and apartments. Its BTU rating is slightly above the typical 24,000, which ensures efficient cooling for sizable areas. With a Seasonal Energy Efficiency Ratio (SEER) of 13, it's not the most energy-efficient model available, but it still offers reasonable performance for its class. However, it does not have the Energy Star certification, which might be a drawback for those prioritizing energy savings.

The unit operates at a noise level of 61 dB, which is relatively quiet for such a powerful air conditioner, making it suitable for use in bedrooms or other quiet spaces. Installation is straightforward with the included window installation kit, and the unit is designed for window mounting, which is common for air conditioners of this type. Additional features like the remote control, digital control panel, multiple fan speeds, and 4-way air deflection provide flexibility and convenience in operation.

The auto restart function is a useful feature in case of power outages, ensuring the unit resumes operation without manual intervention. The 24-hour timer allows for customizable cooling schedules, helping to manage energy costs. Despite its strengths, the unit's weight (136 pounds) might make installation challenging, and it requires a 230-volt outlet, which may not be available in all homes. Additionally, it requires batteries for the remote control, adding a minor inconvenience. It is a strong contender for those needing a robust and feature-rich window air conditioner for larger spaces.

The COSTWAY 24000 BTU Mini Split Air Conditioner is a solid choice for cooling and heating rooms up to 1500 square feet. Its cooling power slightly measures 22,000 BTU, which is close to the category standard, making it suitable for medium to large rooms. One of its strong points is energy efficiency, boasting a very high SEER2 rating of 21 and an Energy Star Most Efficient 2024 certification, which means it consumes less electricity and lowers your utility bills compared to many other units. Noise-wise, it operates at around 50 decibels, roughly the sound level of a quiet conversation, so it’s reasonably quiet for indoor use. The unit uses inverter technology that adjusts compressor speed smoothly, helping maintain a steady temperature and reducing energy wastage.

Installation requires professional help since it’s a split system with separate indoor and outdoor units, including copper piping and wiring, which might add to upfront costs but ensures better performance and durability. Extra features add value, such as WiFi control through an app compatible with Alexa and Google Home, a 24-hour timer, multiple modes (cooling, heating, fan, dehumidify), and a self-cleaning function that helps keep the air fresh and the maintenance easier. The 5-year parts and 8-year compressor warranty provide peace of mind for long-term use.

While the noise level is moderate and not the quietest unit available, it operates at a reasonable sound level. The initial setup can be complex and costly due to professional installation requirements. Also, although the advertised cooling capacity is 24,000 BTU, the actual cooling is slightly lower at 22,000 BTU, which remains effective but is worth noting. The use of the eco-friendly R32 refrigerant is a plus for those concerned about environmental impact. This air conditioner is ideal for homeowners seeking a reliable, energy-saving split system with smart features and year-round comfort in medium to large spaces.