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 LG 10,000 BTU Smart Portable Air Conditioner is a solid choice for cooling medium-sized rooms up to 450 square feet, such as living rooms or bedrooms without windows. It offers a good balance of power and convenience, with 10,000 BTUs delivering effective cooling and a built-in dehumidifier to help with dampness. The unit supports smart controls via LG ThinQ, Amazon Alexa, and Google Assistant, allowing you to adjust settings from your phone or with voice commands, providing modern convenience.

Installation is simple since it’s portable—no window needed—but a method to vent hot air is required, typically through a sliding door or vent kit. Noise levels are moderate at about 50 decibels, noticeable but not overly loud for most indoor environments. Energy efficiency is decent with a SEER rating of 7.8, making it reasonably economical for portable ACs, though not the most efficient available. It also features multiple fan speeds and modes (cooling, fan-only, and dry), adding flexibility depending on conditions.

On the downside, the unit is somewhat bulky and heavy (over 76 pounds), which might make moving it less convenient. Additionally, while it cools well, its power draw (1210 watts) could increase your electric bill if used extensively. If you’re seeking a smart, easy-to-use portable air conditioner that works well in spaces without windows and appreciate voice control, this LG model meets those needs but expect some noise and a bit of weight to handle.

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.