2012 International Mechanical Code (your area may use a different code, but they're usually similar) requires 3/4 CFM per square foot of floor area which works out to 840 CFM for your footprint. That's still not a huge fan. A 12" propeller fan with 1/4 hp motor will put out that much air. You can probably buy one for less than $200.
Last edited by klhansen; 10/15/2019 9:47 PM.