10 Best Air Conditioners Air Conditioners 2026 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 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 Daikin 24,000 BTU Dual Zone Mini Split Air Conditioner is a strong choice if you need efficient cooling and heating across two separate rooms or zones. It offers a solid cooling capacity of about 23,000 BTU with a high energy efficiency rating (SEER 21), meaning it uses power smartly to keep energy bills down. The system uses the eco-friendly R-32 refrigerant and provides reliable heating even in cold conditions, giving you all-season comfort. Noise-wise, it’s impressively quiet at just 24 dB, so it won’t disturb your peace at home. Being a ductless mini split, it’s ideal for spaces where installing traditional ductwork is difficult, such as sunrooms or basements.