For testing and balancing a multi-outlet ventilation system, the Smart Probes VAC set is your solution. In this video, you can see how the set of four instruments used with your Smart Device give you the capacity to measure in-duct air flow and the flow from each vent; show you motor and electrical equipment conditions; an assessment of the humidity and dewpoint concerns throughout the system; mold indication; and much more. Watch the video to find out the advantages of the testo Smart Probes VA