10 Best 24000 BTU Air Conditioning Units 2025 in the United States

The COSTWAY 24000 BTU Mini Split Air Conditioner & Heater is designed for cooling and heating rooms up to about 1250-1500 sq. ft, making it a solid choice for larger living spaces or open-plan areas. Its SEER rating of 18.5 indicates it is quite energy efficient, which helps keep electricity bills lower compared to less efficient units. The inverter technology is a plus, as it adjusts power use smoothly to maintain temperature without frequently turning on and off, reducing wear and noise. Speaking of noise, at 50 dB, this unit operates quietly enough for bedrooms or living rooms, so it won’t disturb your peace.

Installation requires a licensed HVAC professional since it’s a ductless split system, which means it involves mounting the indoor and outdoor units separately but offers flexible placement and efficient climate control. Extra features like five modes (cool, heat, dry, fan, auto), multiple fan speeds, sleep and eco modes, and a remote with timer add convenience and customization to your comfort. It also has a self-cleaning function and auto-defrost to keep maintenance easier. The use of environmentally friendlier R32 refrigerant is an added benefit for green-minded users.

On the downside, installation complexity and cost might be higher than window units, and while noise is low, it’s not completely silent. Also, some buyers may find the size of the indoor unit somewhat large for smaller rooms. This COSTWAY model suits those needing a powerful, energy-saving, year-round climate solution in medium to large spaces, provided they can arrange professional installation.

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 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.