10 Best Air Conditioners Air Conditioners 2025 in the United States

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.

The Daikin Oterra Series 18,000 BTU ductless mini-split is a strong choice if you're looking to cool and heat a medium-sized area, around 1,000 square feet. It offers excellent energy efficiency with a high SEER2 rating of 21 and an EER2 of 12.0, which means it will help keep your electricity bills lower compared to many standard units. This model uses the eco-friendly R32 refrigerant and has a heat pump function, making it useful year-round, even in cooler climates down to about 5°F for heating and up to 122°F for cooling.

The unit includes smart features like automatic defrosting to prevent ice buildup and an air purifying filter that can improve indoor air quality. The included installation kit and wall bracket make setup more straightforward, but because it’s a mini-split system, professional installation is generally needed. Daikin units are typically known for quiet operation, which is advantageous for living spaces.

While the upfront cost and installation might be higher than window or portable ACs, this model is best suited for homes or rooms without existing ductwork. For those seeking durable, energy-efficient cooling and heating with advanced features, especially in areas where duct installation is impractical, this Daikin model presents a reliable and effective option.

The Goodman 3 Ton 14 Seer Package Air Conditioner GPC1436H41 offers a robust cooling capacity of 36,000 BTUs, making it suitable for larger spaces. Its Seasonal Energy Efficiency Ratio (SEER) of 14 ensures relatively good energy efficiency, which can help lower electricity bills. However, it is important to note that this model is discontinued by the manufacturer, which might make finding replacement parts or service more challenging in the future.

The unit operates on a corded electric power source and uses R 410A refrigerant, which is environmentally friendlier compared to older refrigerants. The unit's sizable dimensions and weight of 315 pounds might require professional installation. This model comes with a full parts warranty (provided installation by a licensed contractor), but labor and refrigerant costs are not covered.

If you prefer a unit with proven performance and don't mind the potential challenges of sourcing parts due to discontinuation, this model could be a strong contender for your cooling needs.