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Heres how to calculate fan horsepower when you have change in cfm… Fan Law 101: Why 50% Airflow Doesn’t Mean 50% Power Ever wonder what really happens to power consumption when you reduce a fan's airflow? Here’s the formula: (HP₂ / HP₁) = (CFM₂ / CFM₁)³ This is one of the most important — and most overlooked — relationships in HVAC design. Take this simple example: If you reduce a blower from 300 CFM to 150 CFM, you’re cutting the airflow in half. But the horsepower requirement doesn’t just drop
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🌀 How Much Electricity Does Your Fan Use? 💡 Formula: Power (W) × Hours Used ÷ 1000 = Units (kWh) Example: 75W Fan × 10 Hours ÷ 1000 = 0.75 Units per day 👉 More hours = More units = More bill ₹💸 Know your watts, control your costs! ⚡ #ElectricityConsumption #FanPowerUsage #EnergyCalculation #PowerSaverTips #HomeAppliances | Learn with QS
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