10 Best Smallest Portable Ac Units 2025 in the United States

The BLACK+DECKER Portable Air Conditioner, with 10,000 BTU ASHRAE (6,300 BTU DOE), is a versatile unit suitable for cooling rooms up to 450 square feet. Its size (15.3” x 14” x 24.8”) and portability, aided by casters and side handles, make it easy to move around.

The unit operates quietly at 52 dB, which is relatively low compared to other models, making it a good choice for bedrooms or workspaces where noise might be a concern. The air conditioner also doubles as a dehumidifier and fan, providing additional utility. Energy efficiency is average with a SEER of 6.7, which may result in higher energy consumption compared to more efficient models.

The Follow Me Remote feature allows precise temperature control by using the remote as a thermostat. An easy-to-install window kit is included for convenient setup. However, the capacity of 0.45 liters for dehumidification might be low for very humid environments. This unit is ideal for someone looking for a moderately powerful, quiet, and portable AC unit with added dehumidifier and fan functions.

The SereneLife Small Air Conditioner Portable 14,000 BTU unit is a versatile cooling solution suitable for rooms up to 700 sq ft. One of its key strengths is the high cooling power, making it effective for larger rooms. Additionally, it serves multiple purposes with its 3-in-1 functionality, acting as an air conditioner, dehumidifier, and fan, which adds to its versatility.

The built-in 24-hour timer, auto-swing mode, remote control, and LED display with push button control panel contribute to user convenience. Its sleek, free-standing design makes it aesthetically pleasing for use in various settings such as offices, bedrooms, and living rooms. The unit operates at a relatively low noise level of 57 dBa, which is fairly quiet for a portable AC unit.

The package includes a window mount exhaust kit and a removable air filter, making the setup process straightforward and maintenance easy. The unit's size (32 inches in depth, 18.5 inches in width, and 15.4 inches in height) might make it less portable for some users, especially if space is a concern. Despite these minor drawbacks, the SereneLife Small Air Conditioner offers a good balance of performance, convenience, and design for those looking for a multi-functional portable cooling solution.

The Whynter Portable Air Conditioner ARC-14S is a strong choice if you need to cool rooms up to 500 square feet with its 14,000 BTU power. It uses a dual-hose system, which improves efficiency by bringing in fresh air for cooling and exhausting hot air outside, helping the unit cool faster without recycling warm air. Weighing 73 pounds and measuring 35.5 inches tall, it’s portable but somewhat bulky compared to smaller models, so it might need a dedicated spot to stay stable.

Noise-wise, it runs at about 51 decibels on low speed, which is fairly quiet and suitable for bedrooms or offices where you want minimal disruption. The energy efficiency rating (SEER) is 7.69, which is decent but not the highest, so expect moderate electricity usage. It doesn’t have an Energy Star certification, meaning it might use more power than some newer models designed specifically for energy savings.

A standout feature is its built-in dehumidifier that removes up to 71 pints of moisture daily, helping not just with cooling but also with reducing humidity in damp environments. It also includes helpful extras like a window installation kit, activated carbon filter for cleaner air, and multiple fan speeds with thermostat control for customizable comfort. While it’s quieter than many portable ACs, some users might still notice its sound, especially in very quiet rooms. This Whynter model fits well for those wanting effective cooling and dehumidifying in medium-sized rooms and are okay with a larger, heavier unit that performs reliably but isn't the absolute quietest or most energy-saving option.