I currently am using a 6" vortex fan but its now about a year old. its really really loud now, not just the air moving through it (it's only 460 cfm) and only 6 inches. Would I be better going to an 8 inch or 12 inch fan next time? I still would prefer to not free hang since it makes me have to cool the whole room constantly or it gets too hot. I'm blooming with open face hoods currently and its good but stays warm in that room, making me have to run the central air conditioning since my portable a/c isn't setup. Any suggestions?
I'm looking for a lower priced but quiet inline fan, the fan is hurting my ears unless i tie thick fire resistant blankets around it, but that makes it worse and more unbalanced like myself right now... do i need to just replace my fan?