How do you calculate cubic feet per minute required?

To calculate cubic feet per minute (CFM), you need to determine the airflow required over time. The formula to convert from cubic feet per hour to cubic feet per minute involves dividing the cubic feet per hour by the number of minutes in an hour, which is 60.

This method is essential in HVAC applications, where airflow rates must be specified in terms that are practical for equipment and installation. By taking the total air volume needed in cubic feet per hour and dividing that by 60, you arrive at the CFM, which is a standard measurement for airflow in heating, ventilation, and air conditioning systems.

The other options do not directly relate to the calculation of CFM. Multiplying total volume by 60 would incorrectly inflate the value, as that would convert a rate into a total without taking time into proper account. Adding the volume of windows and doors is not relevant for determining CFM, as it does not reflect airflow requirements. Subtracting air loss from total volume might be necessary in other contexts, but it does not directly inform the calculation of CFM either.