10 Best Window Units 2026 in the United States

The LG 18,000 BTU Heat and Cool Window Air Conditioner is designed to efficiently cool or heat rooms up to 1,000 square feet, making it a solid choice for medium to large spaces. Its strong cooling capacity (18,000 BTUs) ensures that it can handle fairly large rooms without struggling. The unit features a Seasonal Energy Efficiency Ratio (SEER) of 11.1, which indicates decent energy efficiency for its size, helping to keep electricity costs reasonable during use. At 57 dB, the noise level is average for window units—noticeable but not overly disruptive for most daily activities. Installation is fairly straightforward with the included window kit, but keep in mind the unit is quite large and heavy (over 125 pounds), so having help during installation is advisable. The white matte finish is neutral and will fit most window styles. What sets this model apart is its smart technology: it supports WiFi control through LG ThinQ, and you can use Alexa or Google Assistant for voice commands, which is handy if you want to adjust settings without getting up. It also has a supplemental heating feature, allowing it to function year-round, which adds flexibility beyond just summer use.

Additional conveniences include customizable fan speeds, a 24-hour timer, and an auto-restart after power outages, which helps maintain comfort without manual intervention. The unit also alerts you when it’s time to clean the filter, which is a nice maintenance reminder. On the downside, the Energy Efficiency Ratio (EER) isn’t the highest compared to some premium models, so if you prioritize ultra-low energy costs, there might be better options. The noise might be a bit loud if you’re especially sensitive or planning to use it in a bedroom. Also, the 1-year warranty is standard but somewhat limited if you want longer protection. Taking all factors into account, this LG window unit balances strong cooling and heating capacity with smart features and reasonable efficiency, making it a great fit for those wanting versatile and connected climate control for medium to large rooms.

The LG 23,000 BTU Window Air Conditioner with Heat is a strong choice if you want to cool or heat medium to large rooms up to about 1400 square feet, like living rooms or offices. With 23,000 BTUs, it provides powerful cooling, and the supplemental heating option adds convenience for colder days, giving you year-round comfort from one unit. Its energy efficiency rating (SEER 11.3) is decent, helping reduce electricity costs somewhat, although it doesn’t carry a formal energy star rating.

Noise-wise, it runs quietly at around 50-51 decibels on low, so it won’t disturb your sleep or work. Installation requires a 230V power connection and the unit is fairly large and heavy, so make sure your window can support it and that you can handle the size (about 30.5 x 25.5 x 16.8 inches, 145 pounds). The included remote control and features like auto-restart (which turns the unit back on after a power outage) add ease of use, while the filter reminder helps with maintenance.

Some users may find the installation a bit challenging due to its size and weight, and the warranty covers only one year, which is shorter than some competitors. Also, while it offers two fan speeds, it might lack more advanced airflow customization found in pricier models. For those looking for a reliable, quiet, and versatile window unit that both cools and heats larger spaces, this LG model is a solid option, especially if you value simple controls and quiet operation.

The Midea 12,000 BTU U Shaped Smart Inverter Window Air Conditioner is a strong choice for cooling a medium-sized room up to about 550 square feet. Its cooling capacity is solid for this space, delivering quick and efficient cooling thanks to the inverter technology. One of its standout features is energy efficiency—with over 35% energy savings compared to standard models, it even holds the ENERGY STAR certification. This means it can help reduce your electricity bills. Noise-wise, it’s impressively quiet at just 32 decibels, which is much lower than many traditional window units, so it won’t disturb your sleep or conversations.

The unique U-shaped design lets you keep your window partially open for fresh air and a better view, which is unusual and handy. Installation is fairly straightforward with the included quick-snap bracket, fitting most single or double-hung windows between 22 and 36 inches wide. On the smart side, it connects to Wi-Fi, allowing control through an app or voice commands with Alexa or Google Assistant, adding convenience if you like smart home devices.

Additional features like a dehumidifier, dust filter, and fast cooling add value, making it more than just a simple AC. It is somewhat heavy (about 59 pounds), so installation might require some help. Also, while the price reflects its advanced features, it might be more expensive than basic window units. For those seeking a quiet, energy-efficient, smart-controlled air conditioner with a fresh design and flexibility, this Midea model is a solid option.