We have 2 dogs in our household. One is a Shih Tzu and the other is a Boxer. If we bring them inside after an hour we brought them in their own cages. Their scent will stay for hours. This is not good for my brother because he easily gets sinusitis. The best solution for this is to have a home ventilation system, this will help get away the foul smell inside our home. The dehumidifier will help eradicate unwanted smell and will also wipe out mold and mildew.