"A lot of people don't have knowledge of extension cords," Martinez says ... "People just buy a 5,000 BTU air conditioner, because it's $99 on sale, and they think it's going to cool off ...

Portable air conditioners draw warm, humid air from the room, cool it via an internal refrigeration system, and then expel hot exhaust air through a hose that vents to the outside — usually through a ...