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

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.

The Shinco 12,000 BTU Portable Air Conditioner is a solid choice for cooling rooms up to 400 square feet without a window. It offers a good cooling capacity that can handle small to medium spaces comfortably, with a temperature range that lets you fine-tune your comfort. Its 3-in-1 function lets you switch between cooling, fan, and dehumidifying modes, so it can be useful year-round, especially in humid conditions. Installation is straightforward with the included window sealing kit and exhaust hose, but since it requires venting hot air through a sliding window, it’s best for rooms that at least have access to a window opening for the exhaust, even if not for traditional window AC installation.

The unit is portable with casters, making it easy to move around, and the remote control and timer add convenience. Noise level is moderate at 52 decibels, roughly like a quiet conversation, so it won't be too disruptive in most rooms. The energy efficiency is somewhat modest with a SEER of 2.6, so it might use more electricity compared to higher-efficiency models. The 1-year warranty and responsive customer service are reassuring if issues arise.

The unit is fairly bulky and weighs over 56 pounds, so moving it might require some effort. This portable AC suits users needing flexible cooling solutions in rooms without traditional window AC options but with some window access for exhausting hot air.

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.