There are a few things that probably make sense when they accumulate in the duct work of our homes and businesses. These things might include dust, pet hair and dander, pollen. Perhaps even some degree of mold or mildew. Slightly disgusting to think about but not unusual. These things are reason enough to consider duct cleaning.
Consider the possibility that there are things in there that don’t make sense. The first thing that comes to mind is construction/remodeling debris. For whatever reason the leftover wood, sheet rock, nails, carpet remnants, screws etc. have been found in the duct work. It doesn’t seem like an ideal location to deposit said items but they have definitely been found and removed on occasion by many duct cleaners. Another unusual find has been the remains of rodents. I know, gross! But, it has happened. Mice are the usual finds but some duct cleaners have actually found rats, squirrels and even one reported finding a fox. Of course, there are also bugs and an occasional reptile.
One of the most unusual finds that I can think of hearing about was a stack of VHS tapes and books that had apparently been missing from the home for months. Not exactly sure how it happened but they were there.
Obviously none of these things belong in duct work. And, yes, the presence of these things in your ducts can cause your system to run inefficiently and wreak havoc on the quality of your indoor breathing atmosphere. The good news is, all of these things can be located and removed by an expert duct cleaner. So, don’t waste time worrying about what might be in them and contact an expert, especially if you’ve never had them cleaned or if you haven’t had them in cleaned in the last 5-7 years.