RECTIFIER
AIR CURTAIN TECHNOLOGY i-SENSE
Rectifier technology creates excellent downward penetration of the air stream, making it perfect for applications where the door height is greater than the air curtain width, preventing thermal conduction. The laminar air stream reaches the floor at a much lower air speed, preventing the air from colliding with the floor and resulting in efficient use of heat energy. The rectifier transforms the air turbulence caused by the fans into a laminar air stream, ensuring that the air curtain's warmth benefits the indoor climate. This prevents large air displacement, achieving optimal climate separation efficiency while using less energy.
The patented i-sense infrared technology carefully scans the environment around the doorway collecting information on indoor and outdoor temperatures by measuring the exact temperature at floor level. In addition, the i- sense detects when the door is closed. The i-sense (1) collects temperatures from several points both from inside and outside the doorway (2&3), whilst a sensor in the return air measures room temperature (4).
4
1
Without Rectifier
Turbulent Flow
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2
3
With Rectifier
Laminar Flow
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EXAMPLE OF I-SENSE IMPACT The graph illustrates how the outdoor and indoor temperatures are measured using i-sense. As demonstrated, the sensor located on the outside of the doorway estimates an outdoor temperature of 9 °C (green line) whilst, i-sense sensor in the doorway provides a reading of 4 to 5 °C (purple line). This provides the evidence of accuracy readings of climate conditions in the doorway measured by Biddle technology. CHIPS
CONTROLLED AIR STRENGTH
REVOLVING DOOR SOLUTION The DoorFlow₂ Tourniquet model provides a bespoke curved discharge grille, manufactured to match the exact radius of the door – delivering uncompromised climate separation around the full circumference of the doorway. The unit is recessed neatly above the revolving door enclosure, maintaining the architectural lines of the entrance and ensuring no visual disruption to the arrival experience, while keeping cold draughts and warm air losses firmly under control.
The Controlled Air strength technology is paired with the rectifier to create adaptable discharge width, which can be tailored to meet the specific climatic conditions of any given doorway. With six different settings to choose from, the air valve automatically adjusts the discharge width to optimise climate separation efficiency. As a result, the air volume and discharge velocity increase only as much as is necessary to maintain a comfortable indoor temperature while reducing energy consumption.
CHIPS (Corrective Heating and Impulse Prediction System) technology automatically adjusts discharge velocity, air volume, discharge temperature and heat output. Outside, return air and discharge temperature sensors (i-Sense) are used to determine how much heat is required and Biddle’s control algorithm ‘translates’ the data into the strength required, removing the need for users to continually adjust settings. An air curtain with traditional control has heat and fan speed linked to one another: when the fan speed increases heat output increases.
HOTELS | AIR CURTAINS
HOTELS | AIR CURTAINS
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