I am new to this forum and just wanted some advice about whether this is a serious problem and maybe some advice about how do it myself. Here are the pictures of everything you need to see (I am guessing) to give an opinion. Thank you so much for your help in advance. Air Duct pictures by ogabay - Photobucket Let me start by saying I am in the 1 bedroom 1 bath condo in south Florida. So the place has only 3 vents and they are all within a 4 foot range from each other. I saw that the vents were really dirty so I removed them and started scrubbing them. I have a picture of them in the link. So I believe it is mold that was on the vents. Anyways I am wondering what should I do? Is there any way I can clean these coils and ducts or should I hire a professional? My understanding is that there are two types of ducts, aluminum and drywall...mines are drywall. Is it possible to do this myself? Is it necessary to do this now in your opinion? I also would like to add that my wife is really allergic and asthma prone so she is the reason I am looking into this. She has been suffering from a lot of symptoms ever since we moved into this condo.