Yes, though it seems surprising, but it is needed. let me explain reason behind it. You know, there are several types of construction debris which can cause contamination that we find in air duct systems. There are fine particulates, like sawdust and drywall dust or other Construction materials, which can make their way into your system. So, if you need to keep your machine in a good condition, freed from all these pollutants, then you must go for a through professional cleaning.