The RamAir duct cleaning system utilizes the same basic principles of cleaning ducts that has been around for decades, with a few differences- my favorite of which is that it showcases the dust & debris as it's being removed. The reaction from the homeowner as they watch the clear vacuum box fill with dust is priceless. This provides the "Wow Factor" that's cornerstone in carpet cleaning, to duct cleaning. There are other benefits to the RamAir system as well, such as it's portability and ease of use, and the fact that it's virtually impossible to damage even flex ducting with the blasting ball and air whip. Please post any question you have regarding the system, I will check in often to provide the best answers I can. David Hart- Founder/CEO, RamAir International, Inc.