Originally Posted By: Russ

This one runs on an internal battery that you have to charge. I realize your application seems to be non-emergency. But for emergency use, wouldn't you need something that runs on replaceable external batteries? The website says the fan has up to 20 hours of run time per charge (I assume that means running at the lowest setting, under ideal conditions). If we plan for a 3-day blackout, then that may not be enough unless you run a generator.

I'm thinking of getting a battery-operated fan for blackouts during the hot season. But there are so many out there that it's hard to decide which one suits my needs.