PropellerBreeze as ventilation

Hello,

I have a closed canopy on my tank, so very high humidity. I would like to built in PropellerBreeze but not primarly for cooling, rather for ventilation.

Is this possible? For example on a timer like they are on for 15 minutes every hour. So not dependant from temperature.

In this setup, should i mout them to suck air out of the canopy or blow air into it?

Thanks in advance,