10 Best Lightest Air Conditioner 2025 in the United States

The Frigidaire 6,000 BTU Window Air Conditioner is a compact and lightweight option, weighing only 38.2 pounds, making it easy to install and suitable for those seeking a portable cooling solution. With a cooling capacity of 6,000 BTU, it efficiently cools spaces up to 250 square feet, which is ideal for small to medium-sized rooms. The unit operates with a Seasonal Energy Efficiency Ratio (SEER) of 11, which, while not the highest, provides decent energy savings especially with its Eco and Sleep modes designed to reduce consumption.

One of its key strengths is its quiet operation at 51 dB, making it a great choice for bedrooms or other quiet spaces. The air conditioner features customizable cooling with 6-way directional airflow and three fan speeds, offering flexibility in achieving desired comfort levels. It also comes with convenient features like a remote control, a washable dust filter with alerts, and a 24-hour timer for scheduled operation. However, it lacks an Energy Star rating, which might be a consideration for users prioritizing energy efficiency. The unit is designed for window installation, a common but limiting factor for those without suitable windows.

Despite this, its best-seller rank and high customer ratings suggest a reliable and user-friendly experience. This air conditioner caters well to those needing an efficient, quiet, and portable solution for smaller spaces, with added convenience features enhancing user experience.

The BLACK+DECKER Smart Portable Air Conditioner offers a solid cooling capacity of 12,000 BTU (8,000 BTU SACC), suitable for rooms up to about 550 sq. ft., making it a good choice for medium-sized spaces. Weighing around 57 pounds, it's not the lightest portable AC on the market, so if you need something very lightweight, this might feel a bit heavy to move frequently. It runs at a moderate noise level of 52 dB, which is relatively quiet for a portable unit and should be comfortable for bedrooms or living rooms. The energy efficiency ratio (EER) is 5.8, which is average—meaning it won’t be the most energy-saving option but still reasonable for everyday use. Installation is user-friendly with an included window kit, making it easy to set up without professional help.

One of its standout features is smart connectivity, allowing control via a mobile app or voice commands through Alexa or Google Assistant, plus a 'Follow Me' remote that measures the temperature where you are for more precise cooling. It also works as a dehumidifier and fan, adding extra value. It is not Energy Star certified, which could be a downside for those prioritizing energy efficiency. This model is practical for users wanting a versatile, moderately portable AC with smart features, but if weight is your top priority, lighter models might be easier to handle.

The LG 18,000 BTU Window Air Conditioner is designed to cool larger spaces up to 1,000 square feet, making it suitable for medium-sized rooms. One of its standout features is the 18,000 BTU cooling capacity, which ensures efficient cooling. It also offers 3 cooling and fan speeds, combined with an Auto Cool function for customizable comfort. The electronic controls and remote add convenience, letting you adjust settings without getting up.

Additionally, the Auto Restart function is handy, automatically restoring your preferred settings after a power outage, which can be a lifesaver during unexpected power cuts. The washable filter with a reminder light simplifies maintenance, ensuring the unit runs efficiently by alerting you when cleaning is needed. However, at 130 pounds, it is not the lightest air conditioner on the market, which could pose challenges during installation and handling.

The noise level is 61 dB, which might be slightly noisy for some users seeking a quieter operation. The unit also lacks an Energy Star certification, reflected in its SEER rating of 10.3, meaning it might not be the most energy-efficient option available. This air conditioner offers robust cooling capabilities and user-friendly features, but its weight and energy efficiency might be considerations for those prioritizing portability and lower energy consumption.