Epoxy fumes won't leave our home. Help!
I think you're going to need more airflow than just open windows. You can probably rent a large air mover from your local home improvement store in order to circulate lots of air around.  Alternatively, try getting in touch with a local company that deals with cleaning up basement floods as they will have the same type of air movers.

You're looking for something like this:


(source: homedepot.ca)