In this HVAC Training Video, Craig Explain How the UV Light and Air Treatment Works and How to Install It Step by Step. Craig Show the Installation in Sheet Metal Ductwork and in Fiber Board Duct. Craig Show How to Power both the 120v model and the 24v model. Craig also Explain Mounting Locations on a Furnace and an AC A-coil and N-coil as well as on an Air Handler. Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.