[This blog was originally published on August 21, 2018 and was updated on April 24, 2020]
What is an air curtain?
An air door or air curtain is a device used to prevent air or contaminants from moving from one open space to another. The most common use is a downward-facing blower fan mounted over an entrance to a building, or an opening between two spaces conditioned at different temperatures.
The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) defines an air door as follows: “In its simplest application, an air curtain is a continuous broad stream of air … Continue Reading