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# Fan Power Calculator Online

The Fan Power Calculator serves as a crucial tool in determining the energy required for a fan to move air through a system. It calculates the power necessary to achieve desired airflows by considering various factors such as air flow rate, pressure drop, and fan efficiency.

### Formula of Fan Power Calculator

The Fan Power Calculator operates on the following formula:

P = (Q×ΔP)​ / (3960×η)

Where:

• P represents the fan power (in horsepower).
• Q denotes the air flow rate (in cubic feet per minute, CFM).
• ΔP signifies the pressure drop (in inches of water).
• η stands for the fan efficiency, expressed as a decimal.

### Commonly Searched Terms

Here’s a table summarizing frequently searched terms related to fan power calculations:

### Example of Fan Power Calculator

Imagine a scenario where a ventilation system needs to move air at a rate of 1000 CFM with a pressure drop of 1.5 inches of water and a fan efficiency of 0.85. Plugging these values into the formula:

P=(1000×1.5) / (3960×0.85)​

The Fan Power Calculator would output the power required to achieve this airflow under these conditions.

### FAQs

Q: How do I determine the air flow rate?

A: The air flow rate can be measured using specific instruments designed to calculate the volume of air passing through a given area in a specified time.

Q: Why is fan efficiency important?

A: Fan efficiency is crucial as it indicates how effectively the fan converts input power into airflow. Higher efficiency means better utilization of power.

Q: Can I use this calculator for any type of fan?

A: Yes, the calculator can be used for various fan types as long as the parameters (air flow rate, pressure drop, efficiency) are known.