Air volume

air_volume – Volume of air.

Synopsis
module residential; class house { double air_volume [ cf ] ; } object house { air_volume value cf; }

Default
If no value is input for air_volume, it is calculated by:

air_volume = ceiling_height * floor_area

Using default values produces:

$$8\text{ft} \cdot 2500\text{ft}^2 = 20,000\text{ft}^3 $$

Therefore the default air_volume is 20,000 ft$$^3$$