Hello there,
I have to agree with audioguru in that a 12vdc fan would be a much better choice. Those inverters are not very efficient so you'll loose run time just because of that alone.
If you can run for 10 hours with a 12vdc fan of a given efficiency, with a 70 percent efficient inverter you can only run for 7 hours with a fan of equal efficiency.
If you need more flow than a single fan you may use more than one 12vdc fan to get more air flow like that as a 120vac or 220vac fan might give you, as long as the total power is the same.