Air Curtains

Air curtains drive a powerful stream of warm air across an open doorway. The air stream tempers and reduces the inward draught of cold air and pollutants. Air curtains make life far more comfortable in busy locations such as shops, loading bays, and public buildings.

An air curtain forms a barrier to stop the flow of cold air. Although the air curtain can contribute to the heating of a building, its primary function is as a thermal replacement for a solid door.

In theory, an air curtain can shut out draughts through an open door. The efficiency of the seal depends on many factors (power and angle of the air stream, maintenance of a laminar air flow across the open doorway, size of doorway, degree of turbulence at edges, pressure difference between the exterior and interior environments, exterior wind velocity), some of which vary, not just from day to day, but from hour to hour.