Breeze or Freeze? The Essential HVAC Tools Every Smart Homeowner Needs to Know
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Which handheld tool measures the speed of air coming out of your vents to check CFM?
Explanation
An anemometer measures air velocity (often in feet-per-minute or meters-per-second). Multiplying this reading by the surface area of your register vent tells you the exact CFM (cubic feet per minute) of airflow, helping isolate duct blockages.