Hello, I rent a room in a house. The landlord refuse to believe that the person who smokes in the house that that persons room vent is connected to my room vent. He has finally after nine months had his maintenace person clean the vents. The problem is still happening with the added dis comfort of yucky artifiacial scent added. How do I speak to the landlord explaining that his idea of how the vents work and what is actually happening is a health concern. The maintenace person stated that there is only one main air vent upstairs and three downstairs and that they were not tied into my vent. Yes, I am and have been looking for other housing.Thank you for your help and opinions.