Introduction to Fresh Air CFM CalculationStep-by-Step Guide to Calculate Fresh Air CFMCommon Mistakes in Fresh Air CFM CalculationSEO Checklist for Fresh Air CFM Calculation

Step-by-Step Guide to Calculate Fresh Air CFM

Calculating the Fresh Air CFM (Cubic Feet per Minute) for a space is essential to ensure proper ventilation and air quality. Follow these steps to accurately calculate the Fresh Air CFM required for your space.

Step 1: Understand the Formula

The basic formula to calculate Fresh Air CFM is:

Fresh Air CFM = (Occupant CFM + Area CFM)

Where:

  • Occupant CFM is the amount of fresh air required per person.
  • Area CFM is the amount of fresh air required per square foot of the space.

Step 2: Gather Required Values

You will need the following values for the calculation:

  1. CFM per Person: The amount of fresh air required per person. This value can vary depending on the type of space. For example, in a restaurant, it is generally around 7.5 CFM per person.
  2. Number of Persons: The total number of people expected to occupy the space.
  3. CFM per Square Foot: The amount of fresh air required per square foot. In a restaurant, this is typically around 0.06 CFM per square foot.
  4. Area of the Space (in square feet): The total area of the space.

Step 3: Calculate Occupant CFM

Use the following formula to calculate the Occupant CFM:

Occupant CFM = CFM per Person * Number of Persons

For example, if you have a restaurant with 50 people and the CFM per person is 7.5, the calculation would be:

Occupant CFM = 7.5 CFM/person * 50 persons = 375 CFM

Step 4: Calculate Area CFM

Use the following formula to calculate the Area CFM:

Area CFM = CFM per Square Foot * Area of the Space

For example, if the restaurant is 2000 square feet and the CFM per square foot is 0.06, the calculation would be:

Area CFM = 0.06 CFM/sq ft * 2000 sq ft = 120 CFM

Step 5: Calculate Total Fresh Air CFM

Finally, add the Occupant CFM and the Area CFM to get the total Fresh Air CFM required for the space:

Fresh Air CFM = Occupant CFM + Area CFM

Using the previous examples, the calculation would be:

Fresh Air CFM = 375 CFM + 120 CFM = 495 CFM

Therefore, the restaurant would require 495 CFM of fresh air to ensure proper ventilation.

Conclusion

By following these steps, you can accurately calculate the Fresh Air CFM required for any space. This ensures a healthy and comfortable environment for the occupants. For more information on common mistakes to avoid during the calculation, visit our Common Mistakes in Fresh Air CFM Calculation page.

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