Unfortunately, the only place that i can put the fan, is that. All the other are walls from the building, and it is basement, i don't have access from outside.
You are right, the room is not sealed, therefore whenever i open the door, fresh air comes inside. The door won't open very often. Only once every night, for watering and feeding of the rodents.
I keep more than 30 reptiles, my sig is outdated
I am breeding rodents 3 years now, and now i will transfer them to another place, different building.
Is there a filter that i can put on the end of the pipe (outside of the building), to eliminate oddor?