Technologies

To increase the comfort and enhance the climate separation, considerable researchand development has been invested in the contemporary design of the air discharge pattern of the Biddle Comfort Home air curtain. The result is highly-advanced patented rectifier and Constant Air velocity-technologies.

Patented rectifier-technology

The air curtain must discharge air to minimize warm air and, therefore, energy loss. The rectifier stabilizes the air turbulence created in the home fans, discharging air in a laminar air stream. The optimal discharge pattern is the reason that relatively little air is needed to reach the floor, while the professional door opening is also well screened. This revolutionary design means that the Biddle air curtain need not discharge air at high speed and, as a result, an individual walking through the entrance hardly feels the air stream.An air curtain without rectifier will not screen thecomplete opening. The discharged air fans out and does not reach the floor, causing turbulence in the air stream and allowing heat to flow out of the doorway. To reach the floor, the air curtain must discharge the air at a higher speed and, as a result, the unit produces considerable turbulence, higher noise levels and consumes more energy.

Ceiling Ceiling 20°C5°C 20°C5°C air curtain with rectifier Source: TNO-research, 1995(Dutch National Research Centre)
door openingoutsideinside door openingoutsideinside Open door without air curtain Open door with air curtain and rectifier

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