Air Exchange Calculator

Formula

The formula to calculate the Air Exchange Rate (AER) is:

\[ AER = \frac{Q}{V} \]

Where:

\( AER \) is the Air Exchange Rate (exchanges per time)
\( Q \) is the Volumetric Flow Rate (ft³/min or ft³/hr)
\( V \) is the Volume of the Room (ft³)

Air Exchange Definition

Air exchange is defined as the rate of change of units of air moving through a given volume at any time. Typically, this is in reference to the number of air changes per time for a room or indoor area. This helps determine the ventilation of the area.

Example Calculation

Let's consider an example:

Volumetric Flow Rate (Q): 500 ft³/min
Volume of the Room (V): 10,000 ft³

Using the formula to calculate the Air Exchange Rate:

\[ AER = \frac{500}{10000} = 0.05 \, \text{exchanges per minute} \]

This demonstrates that with a Q of 500 ft³/min and a V of 10,000 ft³, the air exchange rate would be 0.05 exchanges per minute.