[Cerium]

If you use an air conditioner, you can do it the Chinese way. In humid cities people hang their clothes near the AC exhaust, since it is "free" hot air. In a super humid city I've seen clothes dry that way in only a few hours.

[sten]

Is this really free? Doesn't it just lower the efficiency of the AC unit?

[detaro]

Why would it lower AC efficiency? It doesn't use the exhaust air for anything. (Obviously you shouldn't block it)

[Cerium]

No, the fans are quite strong and have an effect up to a couple meters away. I think it is more like a cat sleeping on the hood of a car. The waste heat needs to go somewhere, might as well put it in my clothes.

[eximius]

They hang it near, not on top of the vent. And if the exhaust is outside the unit (balcony, etc), it would have basically no effect.