A 12" x 12" duct with 2000 CFM's has an FPM of __________.

To determine the feet per minute (FPM) for a duct carrying 2000 cubic feet per minute (CFM) of air, the formula used is:

[

FPM = \frac{CFM}{Area (sq ft)}

]

First, calculate the cross-sectional area of the duct, which is square.

The duct dimensions are 12 inches by 12 inches. To calculate the area in square feet, first convert the dimensions from inches to feet:

12 inches = 1 foot, so:

Area = 1 ft x 1 ft = 1 sq ft

Now, using the formula with the given CFM:

[

FPM = \frac{2000 CFM}{1 sq ft} = 2000 FPM

]

This shows that with the air volume of 2000 CFM passing through a duct with a cross-sectional area of 1 square foot, the velocity of the air is 2000 feet per minute. Thus, the correct answer is that the FPM is 2000. This calculation is essential for HVAC applications, as it helps in designing duct systems to ensure proper air distribution and efficiency.