How to calculate HVAC CFM with an anemometer.
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How to calculate HVAC CFM with an anemometer.
1️⃣ Measure the grille: 9.5” × 7” = 66.5 in² 2️⃣ Convert to ft²: 66.5 ÷ 144 = 0.462 ft² 3️⃣ Use your anemometer to get air velocity — say it reads 160 FPM 4️⃣ Multiply: 0.462 × 160 = 74 CFM When needed, apply manufacturers k factor. That’s how you get airflow using real data. #hvac #hvactechnician #hvaclife #hvactech
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