Enter the total attic floor space (ft^2) into the Calculator. The calculator will evaluate the Net Free Air.

## Net Free Air Formula

NFA = FP/150

Variables:

- NFA is the Net Free Air (ft^2)
- FP is the total attic floor space (ft^2)

To calculate Net Free Air, divide the total attic floor space in square feet by 150.

## How to Calculate Net Free Air?

The following steps outline how to calculate the Net Free Air.

- First, determine the total attic floor space (ft^2).
- Next, gather the formula from above = NFA = FP/150.
- Finally, calculate the Net Free Air.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

total attic floor space (ft^2) = 600