Yes, but it's worth considering a few things. We caught up with Josh Mitchell, a heating, ventilation, and air conditioning expert, who heads up Air Conditioner Lab, to hear more. "Portable air conditioners are designed with safety in mind," explains Mitchell. According to him, the key difference between your standard window units and portable ones is that the latter are freestanding and can be moved around. In practice, they do more or less the same thing, cooling the air to help you sleep on a hot summer night. "However, it's important to maintain your unit properly, which includes cleaning and changing the filters regularly to prevent a buildup of dust and allergens that could affect the air quality," adds Mitchell. "When it comes to portable air conditioners, safety, and efficiency go hand in hand. By ensuring your unit is properly maintained and vented, you can enjoy a cool, comfortable, and safe sleeping environment.