10 Best Air Conditioners For Rooms Without Windows 2026 in the United States

The Whynter Portable Air Conditioner ARC-14SH is a strong option for cooling rooms without windows, especially spaces up to 500 square feet. Its 14,000 BTU cooling capacity is quite powerful, making it suitable for larger rooms or open areas. It also includes a heater and a built-in dehumidifier with a solid 71-pint daily capacity, which helps improve comfort and air quality. The dual-hose system and included window kit support venting hot air outside, which is essential for windowless rooms but requires a window or sliding door for hose installation. With an energy efficiency ratio (EER) of 7.6, it’s moderately efficient but not ENERGY STAR certified, so expect average power consumption at 1300 watts. Noise-wise, it runs quietly at 51 decibels on low speed—comparable to a conversation—which is good for bedrooms or living spaces. The unit is portable, but it’s fairly heavy at 85 pounds, so moving it around could be a bit challenging. Installation is straightforward but depends on having a suitable window or venting option, which might limit use in some windowless rooms.

Additional features like 4 operational modes (cool, heat, fan, dehumidify) and full thermostat control give you flexible comfort options year-round. This Whynter model presents a versatile and feature-rich choice if you need a portable AC that also heats and dehumidifies, though it is important to consider the installation requirements and moderate energy efficiency.

The BLACK+DECKER Portable Air Conditioner is a versatile unit ideal for rooms up to 400 sq. ft., making it suitable for bedrooms, small living spaces, or home offices. It has a cooling capacity of 9,000 BTU (ASHRAE) or 5,300 BTU (DOE), which should be sufficient for the specified area. The inclusion of a Follow Me remote control is a handy feature, allowing for more precise temperature control by acting as a thermostat.

This AC unit also functions as a dehumidifier and fan, adding to its versatility. The unit is portable, with casters and side handles making it easy to move between rooms. However, the installation kit is designed for windows, which might be a challenge for rooms without windows unless an alternative ventilation solution is found.

The noise level is 54 dB, which might be noticeable in quieter environments but is generally manageable. The energy efficiency ratio (EER) is not specified, but the SEER is 5.4, indicating moderate energy efficiency. Though it may not be the most energy-efficient option, it balances functionality and convenience. This air conditioner is a good option for those needing a portable and multi-functional unit, though users should be mindful of the ventilation requirements for rooms without windows.

The BLACK+DECKER Smart Portable Air Conditioner is designed to cool rooms up to 700 square feet, making it a strong choice for medium to large spaces without windows. With a cooling capacity of 14,000 BTU (ASHRAE) and a Seasonal Energy Efficiency Ratio (SEER) of 6.2, it offers solid cooling performance while being reasonably energy efficient. One of its standout features is its portability and relatively simple installation, including a window kit that helps vent hot air outside—this is important since it needs a way to expel warm air even in rooms without standard windows. It also functions as a fan and dehumidifier, adding versatility.

The unit operates at a noise level of around 54 dB, which is moderate; it’s not silent but shouldn’t be too disruptive for most users. The included remote control has a “Follow Me” feature that uses the remote as a thermostat for more precise temperature control. Additionally, smart connectivity via Wi-Fi allows voice commands through Alexa or Google Assistant, which is convenient but not essential for cooling.

The unit weighs over 60 pounds, so moving it around might be a bit cumbersome. Its energy efficiency, while decent, isn’t the highest in its class, so it might consume more power during extended use. This BLACK+DECKER model is well suited for users seeking a portable, smart-controlled AC with strong cooling power for rooms lacking traditional window options, assuming they can accommodate the venting requirements.