I have had Nathan and Shane at Dirti Ducts cleans vents at not only my personal home, but at my job sites as well. Often times during a remodel dust becomes airborne and will enter the ductwork clogging your coils and eventually messing up your AC efficiency as well. I throw in this service on my remodels and the money spent (usually about $400 which includes coils on the AC, and dryer vent) is well worth it. I highly recommend them, and after more than a dozen jobs I will not be using anyone else. The crew is very meticulous, and Shane and Nathan (the owners) are very customer service oriented.