Today I am reviewing the 416 Mini Vane CFM Anemometer from Testo. The Testo 416’s primary operation is to measure volume flow quickly and accurately. The Testo 416 is great for flow velocity measurements in ducts, evaluating thermal comfort, HVAC installation, repair, diagnostics and optimization, fume hood testing, installation, and verification, ventilation system installation, servicing, and analysis, environmental wind testing, ionizer flow output, automobile aerodynamic testing, plant/facilities maintenance, etc.