10 Best Air Conditioners Air Conditioners 2025 in the United States

The Daikin 18,000 BTU LV Series mini-split air conditioner is a solid choice if you're looking to cool or heat a medium-sized space up to about 1,000 square feet. It offers strong cooling power at 18,000 BTUs and even better heating capacity with 21,600 BTUs, which makes it a flexible option for year-round comfort. One of its standout features is its high energy efficiency, rated at 19.5 SEER2 and 12.7 EER2, meaning it can save you money on electricity compared to less efficient models. The unit runs quietly at around 37 decibels, so it won’t disturb daily activities or sleep. As a ductless mini-split, it’s ideal for homes or rooms where installing ducts is difficult or unwanted, such as sunrooms, basements, or garages. It also comes with a useful 15-foot installation kit and remote control, simplifying setup and daily use.

Advanced features like the Intelligent Eye sensor adjust airflow based on room occupancy, and the built-in air purifying filter improves indoor air quality. On the downside, this model requires a 230V electrical setup and isn’t Energy Star certified, which might be a consideration if you want the highest eco ratings. Also, the initial cost and installation may be higher than window units, but the efficiency and comfort benefits can justify this. This Daikin unit is excellent for those wanting efficient, quiet, and versatile heating and cooling without ductwork, making it especially suitable for renovation projects or additional living spaces.

The Daikin 24,000 BTU ductless mini-split air conditioner is a strong choice for homeowners looking to cool or heat spaces up to about 1,500 square feet without ductwork. It offers a solid cooling capacity right at 24,000 BTUs and heating capacity up to 27,300 BTUs, making it versatile for year-round comfort. The 18 SEER2 rating means it runs efficiently, helping lower electricity bills compared to older or less efficient units. Noise level is quite low at about 38 decibels, so it won’t disrupt quiet rooms. Being a wall-mounted mini-split, it’s good for rooms where installing ducts is difficult, like additions, basements, or garages. The included installation kit and accessories simplify setup.

On the feature side, it offers customizable airflow, several operating modes including energy-saving ECO+, and even an air purification filter to improve indoor air quality. However, it’s not Energy Star rated, which might matter if you’re looking for the strictest energy certifications. This unit leans toward mid-to-upper pricing and requires professional installation due to its split system design.

If you want a reliable, efficient, and quiet mini-split for moderate-size spaces and value advanced features like heat pump heating and air cleaning, this Daikin model is a suitable option. For those with tighter budgets or who prefer Energy Star certification, comparing other models may be beneficial.

The Daikin Oterra Series 24,000 BTU mini-split is a strong choice for cooling and heating spaces up to about 1,500 square feet. With a cooling power of 22,400 BTU (variable between 7,000 and 26,400 BTU) and heating capacity up to 23,600 BTU, it offers flexible temperature control thanks to its DC inverter technology. Its high energy efficiency is notable, boasting a 21 SEER2 rating and excellent EER of 12.0, which means it uses less electricity while keeping your space comfortable year-round. This makes it a smart pick for those wanting to save on energy bills while staying cool or warm.

The unit works well in a wide range of temperatures, from freezing cold to hot, making it suitable for different climates and various rooms like basements, sunrooms, or garages where traditional ACs aren't practical. It includes features like an anti-corrosion heat exchanger, automatic defrost, and a washable air filter, which help the system last longer and keep air quality high. The package comes ready with installation parts and a remote control, simplifying setup.

If you are looking for an energy-efficient, versatile ductless solution with strong heating and cooling abilities, the Daikin Oterra is a solid option, especially for medium-sized rooms and homes aiming for comfort and savings.