10 Best 24000 BTU Air Conditioning Units 2025 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 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.