WINDBARR 

Air Curtain As Point-of-Use Displacement Ventilation

Filtered air is delivered from under the desk at a 40 degree angle, travels up the body and into the breathing zone.

Shown with optional desk hanger, optional double side mounting tape and detachable battery.

OUR AIR CURTAIN MODULES

Air curtains separate zones of air such as cold from warm and clean from dirty.  Common practical examples of the principle are open refrigerated food displays and loading docks with entry screening to keep bugs and dust outside, and keep conditioned air inside.

Our vision is the miniaturization of the application to desktops using high speed, low power, blowers that can be powered by USB ports of a laptop or phone power banks.

An air zone around a desktop can be separated from room air that may contain smoke, airborne viruses, etc. .  Our curtains are not equivalent to N95 face masks but can provide a high degree of rejection of coughs and sneezes.  They may provide an alternative where masks are not acceptable or cannot be used.

Our personal desktop air curtain is a module that can be used alone or to assemble a variety of larger air curtains by connecting multiple modules in a row (bar) or stacking vertically and used in push / pull arrangements. Our extreme vision is a baseball hat clip-on for a clean air curtain over the breathing zone and a shield / ventilation in a school bus seating "silo".

A simple electrostatic filter is used to keep the blowers clean, but high efficiency filters are more typical.  Where the air curtain is used as displacement ventilation supplying clean air to the breathing zone, flat, double layer MERV 13 or fluted HEPA 12 filters are available for high efficiency removal of air born particulates.

The module is 5“ X 5“ and provides a thin 4 1/2 “ wide, uniform air stream at up to 10 meters per second.  The module is comprised of a centrifugal (radial) blower with tangential flow which is re-directed through flow balancing baffles and an array of small tubes for straightening the flow.  If the module is used as an air umbrella shield (as pictured above), some filtered air can be directed into its canopy.  Air curtain flow directed upwardly can be exhausted by the ceiling vents of the room ventilation.

The parameters for the air curtains are based on published research on air curtains for personal protection.

At this time, we are seeking sites that may benefit from our air curtains.  Pre- production models can be provided for evaluation.  Contact us for evaluation units.

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