10 Best Air Conditioners Air Conditioners 2026 in the United States

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.

The Frigidaire 12,000 BTU Window Air Conditioner is designed to cool medium to large rooms, up to about 550 square feet, making it a good fit for living rooms, larger bedrooms, or small offices. Its 12,000 BTU cooling capacity is effective for this space size, providing enough power to keep the area comfortable. The unit operates quietly at around 57 decibels, which is about the noise level of a normal conversation, so it won’t be too disruptive when running. It offers three fan speeds and 6-way directional airflow, allowing you to customize the cooling to your liking. Energy efficiency is decent, with a Seasonal Energy Efficiency Ratio (SEER) of 10.9, and features like Eco Mode and Sleep Mode help lower electricity use by adjusting cooling as needed. This can save money on energy bills if used properly.