I wonder if this can be used to help pull heat from things also.

Like, let's say you have it pull the hot air from a bank of ac units, or refrigeration, or something like that. If the ambient air it is pulling is hotter than the low pressure air created, you should have even more energy, no?

I can imagine that the cheap fan would have low heat tolerance, but I'm not talking about something like restaurant exhaust. Just increasing the cooling of an ac unit should help lower energy costs.