An approach to determine infiltration characteristics of building entrance equipped with air curtains.

Highlights: [•] Air curtain was characterized by optimum condition, inflow/outflow break-through. [•] Infiltration models were developed for air curtains based on door usage frequencies. [•] A new parameter, flow modifier, is added to characterize air curtain infiltration. [•] Air curtain reduces more infiltration than single door, and door with vestibule. [•] Air curtain could cause more exfiltration than door without air curtain. [Copyright &y& Elsevier]