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Testo 405i Smart Probe hot wire anemometer and a small lesson on how it works. Have a great day techs, Happy HVACing! #hvac #hvacr #hvaclife #hotwireanemometer #testo405i #realhvacreallife #airflow #airflowtesting #testinstrument #testo #iaq #indoorairquality #airconditioning #refrigeration Testo North America | HVAC Know It All
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