What is the formula for calculating BTUs based on airflow?

The formula for calculating BTUs based on airflow is essential for HVAC professionals as it allows them to determine the heating or cooling capacity required for a space. The correct formula, BTUH = CFM x 1.08 x ΔT, incorporates several critical elements.

In this formula, BTUH represents British Thermal Units per hour, which is a measure of heat energy. CFM stands for cubic feet per minute, indicating the volume of airflow. The factor of 1.08 is derived from the specific heat of air, which takes into account the density of air and the conversion between cubic feet per minute and BTUs. Finally, ΔT refers to the temperature difference (in degrees Fahrenheit) between the incoming and outgoing air.

This formula effectively quantifies the heat transfer that occurs with the airflow moving through a heating or cooling system and is a vital tool in calculating the efficiency of HVAC systems. Understanding how to use this formula empowers HVAC technicians to tailor systems to meet specific heating and cooling demands efficiently.