Shop vacs vary from model to model and not everyone works in exactly the same way. But generally speaking, if you want to use your shop vac as a blower, then you’ll first need to pull the latches back on the side and lift off the top of the machine. The next stage is to remove the bag and filter, shut the lid and snap the latches back in place. Finally, remove the hose from the front suction port and locate the exhaust port (normally found at the top). Secure the hose into the port and you’re good to go!