Which air curtain is suitable for you always depends on the type of building in which the device is to be installed. The corresponding installation principle is then also decided. Taking stock briefly offers some clarity here. The following building types are defined:
Building type A The room has door surfaces only on one side of the building and no connection to upper floors, which creates an internal thermal condition
As a rule, an installation according to the STE standard principles is sufficient.
Building type B In the building, there are room connections to the top through an open extension over several floors. There are escalators, lifts or permanently open corridors, escape routes and staircases.
For this building type, an installation according to the AWE screening roller principle is recommended.
Building type C Unprotected door surfaces are opposite or around the corner and cause draughts
In addition, the following points must be taken into account when selecting and installing an air curtain system:
All basic conditions must be analysed and evaluated. More powerful units should be deliberately chosen for this situation and mounted according to the installation principle AWE or even better according to TWINtec - counter-current principle.
If you need help with the analysis of the building, our field service will be happy to assist you on request. About the field service Once the type of building has been determined, the installation occurs with the appropriate variant:
The larger the volume of the room or building, the greater the dynamic pressure on the building. This dynamic pressure causes a negative pressure, which is reduced above the door area, among other things. This means that there is an undesired exchange of air masses at different temperatures.
The exhaust height is one of the most important criteria when selecting air curtain systems. The lower the unit is mounted above the ground, the smaller the amount of air is required to achieve a sufficient screening effect. In that regard, all architectural and technical possibilities should be taken into consideration. Low air volume means: low heating power, low noise level and low purchase and operating costs.
The room height in connection with the room area gives a characteristic value for the leakage of the room and thus for the design of the air curtain. This also applies in connection with thermal buoyancy.
A larger room area (room volume) generally results in an increase in leakage caused by doors, windows and leaks in the building. This increases the air exchange at the door. Due to these conditions and as a result of practical experience, the inclusion of the room size to be screened has proven itself for the design of air curtain systems.
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