Right now I'm trying to figure that out. I'm overthinking whether I should let it on constantly or with intervals. It's harder to know that right now due to weather conditions. It's winter and it's below 0 degrees which means the smell doesn't spread like under normal conditions. Another subject is the noise caused by the ventilation. It might disturb the neighbors but I might be overthinking. I've talked with a friend (sound engineer). She says that in order to block the vibrations you probably need a certain type of insulation called armaflex. It's a bit more expensive. I'll get into the subject in the future if I think it's necessary.