The ACF filter was subjected to a 24-h or a 12-h VOC adsorption period followed by a shorter desorption (regeneration) period. The adsorption period simulates a stage of air cleaning of similar length in an occupied building, and the regeneration period simulates the stage in which VOCs are removed from the ACF media and vented outside, making the ACF ready for the subsequent air cleaning cycle. The air flows through the ACF were controlled using mass flow controllers (MCR-50SLPM-D/5M, DS, Alicat Scientific) and were maintained to provide a 31.4 ± 0.1 m min−1 face velocity during the adsorption period. This face velocity is typical of the velocity expected in a real-world application of ACF media as a pleated filter in a filter bank within the supply airstream of HVAC systems.