What is the BTU output for a coil with an airflow of 21,000 CFM with an EAT of 67° and LAT of 84°?

To determine the BTU output for a coil based on given airflow and temperature data, you can use the formula:

[ \text{BTU/hr} = \text{CFM} \times 1.08 \times (\text{LAT} - \text{EAT}) ]

In this formula:

• CFM stands for Cubic Feet per Minute, representing the airflow rate.

• 1.08 is a constant that accounts for the density of air and specific heat.

• LAT is the Leaving Air Temperature, and EAT is the Entering Air Temperature.

Given the values:

• CFM = 21,000

• EAT = 67°F

• LAT = 84°F

The difference in temperature is:

[ \text{LAT} - \text{EAT} = 84°F - 67°F = 17°F ]

Now plug in the numbers into the formula:

[ \text{BTU/hr} = 21,000 \times 1.08 \times 17 ]

First, calculate ( 1.08 \times 17 ):

[ 1.08 \times 17 = 18.36 ]

Next, multiply by the CFM: