rotating vane anemometer readings

Down here, most residential central air installations put the air handler in a closet or small mechanical room located in a central hallway. Return air is brought into the closet or room usually by ducts, other times by means of a door grille, but the air handler itself  usually has a no return duct. They are located on an four-legged metal base or directly anchored to the walls. I would like to be able to mesasure return air CFM, but I suspect that in such a confined space, air flow is pretty turbulent . Are rotating vane anemometer readings any useful in such conditions?

Rookie Asked on September 14, 2018 in Residential HVAC.
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