Horizontal Air Curtains are the conventional type commonly used worldwide. They produce a top-down airflow that deviates into two separate air streams above the floor.
Vertical Air Curtains compliment modern architectural design trends that favor very high doors and tall ceiling. They produce air streams from both sides that converge at the center of the door.
Concealed Air Curtains are a special type of Horizontal Air Curtain. They produce a top-down airflow. The main characteristic is that the whole units will be totally concealed in the false ceiling.