Hey guys! I'm in the planning and designing portion of my new snake and rodent rooms. I've searched and I've yet to find a good answer to the question of exhaust for a rodent room.

My rodent room is going to be 7.5' x 12' x 8' ceilings. The closest suggestion I've found for a rodent room exhaust was for a ~500 cfm exhaust fan. However, seeing as that will completely replace the total volume of air in my room in 1.5 minutes, it seems like overkill.

With 500 cfm, I don't imagine it would need to be run very often. However, I would like to use a smaller fan if I could. That would result in smaller pipes and smaller holes. Would 250 cfm work and how often would I need to run it?

Basically, I'm not looking for a fan that will run 24/7, but I'm also not looking for overkill. Having the fan run for a few hours a day to keep the smell tolerable when I walk into the room will be acceptable. I'm setting it up so that as air is exhausted out of the room, fresh air from outside will be pulled in. Therefore, the room itself will be sealed from the rest of the building.

Any thoughts or suggestions are appreciated.