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Energy saving air curtain

technologies

In model CA

three Biddle air curtain technologies have been combined. This renders

the comfort air curtain to the most energy saving and most user-friendly in its kind.

Under all conditions the best possible continuous operation of the air curtain is

guaranteed: energy-saving and optimum climate separation with the best

comfort. To achieve this the air curtain must meet the following conditions:

1. Sufficient strength (foranefficientclimateseparation)

- the entire doorway is screened off to the floor.

2. Sufficient heating capacity (foroptimumcomfort)

- the incoming cold air is heated to the required inside temperature.

To make this possible the perfect concerted action between the rectifier-, the CA-

and the CHIPS-technology is necessary.

1. Rectifier technology for a turbulence-

free air stream

All Biddle air curtains are equipped with the patented rectifier. This outlet grille

ensures the turbulent air coming from the ventilators being transformed into a

laminar air stream. The air curtain reaches the floor at a much lower air speed than

air curtains without rectifier. The incoming cold air is heated so it is not felt as a

draught. This heated air benefits the climate inside so no energy is lost. The result is

a climate separation efficiency of over 90 %.

Consequences of high-speed discharge velocity

If more heating capacity is required, the air curtain is set at a higher level causing

the air speed and air volume to increase. However, an air speed which is too high

also causes more turbulence and at the same time there is the risk of the air stream

hitting the floor with corresponding loss of energy. The noise level also increases

when the speed is raised. For that reason Biddle has developed the CA-technology.

It is made up of an ingeniously designed air valve which adapts the outlet width to

the situation.

Throughtherectifiedoutletgrilletheair

isblowndowntothefloorwithoutany

turbulence.

Fig.1:Aircurtainwithoutrectifier:

energylossanddraught.

Fig.2:Biddleaircurtainwithrectifier:

energysavingandmuchcomfort.

Source:independentTNOresearch:

“Energyanalysisofanaircurtain”.

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Biddle CA2 Bedienungsanleitung Seite 6