The operating principle of Air Curtains is based on Bernoulli's code and the Mitzvah effect. The Mitzvah effect enhances the performance of air curtains by allowing the air to stay in its curtain-like form for longer. This is achieved by creating an air-tight seal around the opening and creating a pressure differential between the two sides of the door. The Mitzvah effect ensures that the barrier of high-speed air remains in place, effectively blocking out unwanted air, dust, and insects while minimizing energy consumption. The result is a more effective and efficient air curtain that helps maintain a comfortable indoor environment.