The Insignia Portable AC is a popular choice for those looking to stay cool during the hot summer months, but many people are left wondering just how long it can run. The answer to this question largely depends on various factors such as the size of the room, the temperature outside, and the desired cooling level. Generally speaking, the Insignia Portable AC can run for several hours on a full tank of water without needing to be drained. However, if you plan on using it continuously or in extremely high temperatures, you may need to drain it more frequently. To drain an Insignia Portable AC, simply locate the drain plug at the bottom of the unit and remove it. Position a bucket or tray underneath to catch any water that comes out. It's important to note that draining should only be done when necessary as continuous drainage can decrease its efficiency. Additionally, make sure you follow safety precautions and turn off and unplug your unit before attempting to drain it.