MR DUCT CLEANING cleans the whole system for you, including all vent registers, return air ducts, ductworks, as well as furnace coils, air filter,air handler-motor and fans. By cleaning the entire system, you could avoid all dirt and debris from areas that weren’t cleaned blowing back into areas that were cleaned as soon as you turn on your heating or cooling system. Many other duct cleaning companies will only clean vents at a time, or won’t clean the units, and the vents end up getting recontaminated because the whole system was not cleaned at one time.