Definition: High-velocity air stream across a doorway or opening that creates an invisible barrier, reducing warm air infiltration into cold spaces during door openings.
Applications::
- Cold room doorways (walk-in access)
- Loading dock doors
- Retail display cases
- Maintaining temperature zones
Effectiveness: Reduces infiltration heat load by 60-80% compared to open doorway, but not as effective as closed door.
Related Terms: Strip Curtain, Infiltration Load, Rapid Door, Cold Room Door