I want to put a ventilation fan in my 8x8 2nd story darkroom. I was going to put in a bathroom exhaust fan but it seems like a better option might be to install a fan in the attic and run ducting down to the actual room. I don't see any reason why the darkroom can't be vented into the attic. I know that if the fan is noisy I will never use it because I like my darkroom to be quiet, so having a fan installed in the attic seems like a good solution compared to the bathroom fan. The problem is that I don't know where to get a fan like this or what it would be called.