10 Best Air Conditioner Window 2026 in the United States

The Frigidaire 23,000 BTU Window Air Conditioner is a solid choice for cooling larger rooms or apartments up to about 1400 square feet. Its powerful cooling capacity helps it handle big spaces effectively, which is a key factor if you want quick and consistent cooling. It also offers supplemental heat, which adds extra value by providing some warming ability in cooler months. The unit features a washable filter that helps keep the air cleaner and the machine running well, plus a programmable timer and sleep mode for energy savings and quiet night use.

The remote control with built-in thermostat is a convenient touch, letting you adjust temperature and fan speed without getting up. On the downside, this unit weighs 39 pounds and measures about 13 by 16 by 12 inches, so it needs a sturdy window and some effort to install. At 52 decibels, it’s moderately noisy—noticeable but not overly disruptive in most settings.

Energy efficiency (SEER of 11.0) is decent but not exceptional, meaning it may use more electricity compared to newer or more advanced models. If you’re looking for a large-capacity window air conditioner with extra features like heating and dehumidifying, this model fits well. However, if a quieter or more energy-efficient option is a priority, you might want to explore alternatives.

The LG 24,500 BTU Smart Window Air Conditioner is designed for large rooms up to 1560 sq. ft., making it suitable for bedrooms, living rooms, or apartments. It offers robust cooling power and features smart controls through LG ThinQ technology, compatible with Amazon Alexa and Google Assistant, allowing remote operation. The unit has a cooling capacity of 24,500 BTUs and an Energy Efficiency Ratio (EER) of 10.3, which is decent but not the highest in energy efficiency.

This air conditioner operates at a relatively low noise level of 50 dB on low settings, though it can reach up to 61 dB under some conditions, which may still be noticeable in quieter environments. It includes three cooling and fan speeds and a dehumidification function that can remove up to 1.8 pints of moisture per hour, enhancing comfort further. Additional features include a user-friendly digital control panel, a timer, a filter check reminder light, and a power failure auto restart. The installation kit and remote control are included, but note that the unit is quite heavy at 132 pounds, which may pose challenges during installation.

The lack of Energy Star certification may be disappointing for those seeking maximum energy savings. Nonetheless, the convenience of smart features and the strong cooling capacity make this air conditioner a solid choice for larger spaces. The 24-hour timer and the filter check reminder add extra ease of use.

The Amazon Basics 5000-BTU Window Air Conditioner is designed for small rooms up to 150 square feet, making it a good choice for bedrooms, home offices, or compact living areas. Its 5000 BTU cooling capacity is sufficient for these spaces, offering cool air without overloading your electricity use. With an Energy Efficiency Ratio (EER) reflected by its SEER of 14, it provides decent efficiency to help keep energy costs reasonable. Noise level at 56 dB is relatively quiet for an air conditioner, so it won't disturb sleep or work much, though it’s not the absolute quietest model available. Installation is straightforward for anyone with basic DIY skills—it fits standard windows (23 to 36 inches wide) and comes with an adjustable kit, but you’ll need a screwdriver on hand. The unit is compact and lightweight enough to handle without too much trouble.

Additional features include a washable filter that traps dust and allergens, helping improve air quality, plus customizable comfort settings like 7 temperature options, 2 fan speeds, and direction control to tailor airflow. It also offers a fan-only mode and a dehumidifying function, adding versatility beyond just cooling. However, this AC is best suited for small spaces and might struggle to cool larger rooms effectively. Also, mechanical controls might feel less modern compared to digital interfaces.

This model is a practical, affordable option if you want a simple, effective air conditioner for a small room without advanced smart features.