I have a mystery. I have a resident (college student) who has been having severe allergies only when inside the unit. The carpets were steam cleaned, deordized prior to move in and then again after. We got them a special furnace filter (it's a townhouse and residents are responsible for changing them.) I ozoned it as well. The kid has an air purifier in the room. The kid is just miserable. He had no allergy issues when he was home over the summer, but the minute he returned to college and the unit, same issues. I feel so terrible and I'm running out of ideas. I have offered to clean the carpet again as that seemed to help for a bit. I also asked if they could identify WHAT he is allergic to so that I can further research and the mom was not quite willing to pay the $ for the allergy tests, rather just has him on allergy meds, although I guess he has a doctor appointment next week... Obviously I cannot replace carpet in an occupied unit, it would be so hard and they are going on their second lease term there. Has anyone ever heard of this happening?? I'm so lost here. He's a great kid and they are fantastic residents, I'm just running out of ideas of what to do without knowing what he's allergic too. My boss and I discussed duct cleaning, but again, that's no guarantee either and would be very expensive. We want to do the right thing of course but I've just never had this type of thing happen.