If a coil has an airflow of 1800 CFM and an EAT of 76° and LAT of 98°, what is the BTU output?

To calculate the BTU output from a coil given the airflow, entering air temperature (EAT), and leaving air temperature (LAT), you can use the formula:

BTU/hr = CFM × 1.08 × (LAT - EAT)

In this case, the airflow (CFM) is 1800, the entering air temperature (EAT) is 76°F, and the leaving air temperature (LAT) is 98°F.

First, find the temperature difference (LAT - EAT):

98°F - 76°F = 22°F.

Now apply the values to the formula:

BTU/hr = 1800 CFM × 1.08 × 22°F.

Calculating this gives:

BTU/hr = 1800 × 1.08 × 22 = 42,768 BTU/hr.

This result indicates that the coil output is 42,768 BTU/hr, which aligns with the correct choice. Understanding this calculation is crucial for HVAC professionals, as it helps in determining the heating or cooling capacity required to maintain comfortable indoor conditions in various environments.