RotoBrush
With the Rotobrush, duct cleaning is simple.
The Rotobrush was designed and patented for one purpose: air duct cleaning. It is the only method that power-brushes and vacuums at the same time. Because the rotating drive cable is contained within the vacuum hose, the Rotobrush can be snaked through the air duct all the way to the plenum.
Roto-Visiontm
The Roto-Vision Video Inspection System is designed to provide instant video footage of remote locations. It can be used for inspection of HVAC systems and air ducts for leaks, cracks, and contamination. The Roto-Vision’s tiny camera 
can get into dark hidden spaces and simultaneously illuminate the area while providing full color digital video.
In air duct cleaning, not only can the Roto-Vision be used for inspection before and after cleaning, it can be used as an active monitoring system during cleaning. The Roto-Vision digital camera can be attached directly to the Rotobrush hose up to two (2) feet behind the brush and nozzle. As the Rotobrush cleans, the Roto-Vision system will display an active picture of the entire cleaning process. This insures that every foot of duct is properly cleaned.