Those numbers can't be right but if they were, Fan V would be more efficient. There shouldn't be a nearly 5 fold difference in efficiency for a typical a/c motor. They should be in the 60-120 CFM/watt. So the 80 is probably right and the 384 is not.

Thanks. Perhaps it's a typo in the advertising and the airflow efficiency is 84, but I will follow up with the company to double check. If that's the case, however, is fan V still more efficient? Also, if it helps, fan A has a "premium power 188x25 mm torque-induction motor," and fan V has a "premium power 165x25 mm dc motor."

Did you use this resource?

http://www.energystar.gov/index.cfm?fuseaction=find_a_product.showProductGroup&pgw_code=CF

A DC motor? What is converting the AC in your house to DC? and how many watts is it consuming?

I will check that website, thanks ionized. Re the motor (from the fan website--Monte Carlo, BTW): I don't know anything about dc motors except my sewing machines have them, too, and if they are converted, I don't know what is converting them.