Greatly Improve Portable Air Conditioner Efficiency

Greatly Improve Portable Air Conditioner Efficiency

Portable air conditioners are easy to use but deeply flawed. Most rely on a single exhaust hose, causing hot air to be pulled back into the room. This guide explains why that happens and how a simple DIY dual-hose conversion—using duct tape, carton, or 3D-printed parts—can drastically improve efficiency and performance, even with cheap models.