Electric air dusters look tempting as portable fans because they push a lot of air from a small body. They do work in the most basic sense. But for cooling yourself, they are usually worse than a proper handheld fan.
Fans with ice boxes sound like a simple trick: add ice, switch the fan on, and get colder air. And yes, they can help a bit. But there is a catch. Once the ice melts, the cooling drops off fast.
Fans and drafts don't cause colds or stiff necks. Here's the science behind why this common myth is wrong - and why fans are actually good for you in hot weather.