Portable air conditioners promise quick relief from summer heat, but their actual performance often disappoints. This article explains why portable ACs just aren't as efficient as people expect, including problems with heat exchange, leaks, and room setup. You'll find out how their design limits their cooling power, how much energy they really use compared to other options, and what mistakes make them even less effective. We also include tips to help you get more out of a portable AC if you already own one. Understanding the trade-offs can help you decide if a portable AC is worth it for you.