10 Best Air Conditioners Air Conditioners 2025 in the United States

The Daikin 18,000 BTU Multi-Zone Mini Split is designed to cool and heat two separate rooms independently, making it a great choice if you want personalized comfort in different areas of your home. Its cooling capacity of 18,000 BTU (split as 9,000 BTU per zone) is suitable for spaces around 800 square feet, which fits well for medium-sized rooms or combined smaller rooms. The unit stands out with high energy efficiency, boasting a 21 SEER2 rating and using the eco-friendly R-32 refrigerant, which helps save on electricity while being better for the environment. Noise level is impressively low at just 24 decibels, so it operates quietly without disturbing your daily activities or sleep.

The LG 18,000 BTU Heat and Cool Window Air Conditioner is designed for medium to large rooms up to 1,000 square feet, making it a solid choice if you need effective cooling and heating in a single unit. With an 18,000 BTU cooling capacity, it can handle fairly large spaces, which is convenient if you want to avoid buying separate devices for different rooms. It also includes a supplemental heating option, so it can keep you comfortable year-round, not just during hot months.

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.