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Evaporative Cooler CFM Formula:
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The CFM (Cubic Feet per Minute) calculation for evaporative coolers determines the required airflow based on room area and desired air changes per hour. This ensures proper cooling and ventilation for the space.
The calculator uses the CFM formula:
Where:
Explanation: The formula calculates the required cubic feet of air that needs to be moved per minute to achieve the desired number of complete air changes in the room each hour.
Details: Accurate CFM calculation is essential for selecting the right size evaporative cooler, ensuring efficient cooling, proper humidity control, and energy efficiency. Undersized units won't cool effectively, while oversized units may cause excessive humidity.
Tips: Enter the room area in square feet and the desired air changes per hour. Typical ACH values range from 20-40 for evaporative cooling applications. All values must be positive numbers.
Q1: What is a typical ACH value for evaporative coolers?
A: Most evaporative coolers require 20-40 air changes per hour, depending on climate conditions and cooling requirements.
Q2: How does room height affect CFM requirements?
A: This calculation assumes standard ceiling heights. For rooms with unusually high ceilings, you may need to calculate based on cubic feet rather than square feet.
Q3: What factors can increase CFM requirements?
A: High heat loads, poor insulation, large window areas, and high occupancy can all increase the required CFM for effective cooling.
Q4: How often should the air be changed in a room?
A: For evaporative cooling, 20-40 changes per hour is typical. More changes may be needed in very hot or humid conditions.
Q5: Can this calculator be used for other ventilation systems?
A: While the basic formula applies to various ventilation systems, specific requirements may vary based on the type of system and its intended use.