Selection factors of air curtains

To select an air curtain the following factors should be kept in mind:

• The height of the installation measured from the discharge diffuser to the floor
• The width of the door
• The location of the building to determine the level of protection needed against weather conditions (temperature, humidity and wind)
• If the building has several doors in the same area, different or opposite façade
• If the building has several storeys connected by escalators/stairs
• Pressure differences between the inside and outside of the building
• Door characteristics: If always open, it opens automatically, it opens manually, revolving door, etc.
• Characteristics of the ventilation and air conditioning installation
• Voltage and electrical power availability
• Type of business, style and decoration of the premises
• Free hanging or recessed, horizontal or vertical installation, heated or unheated, etc.

Some installations with strong wind conditions may compromise the air curtain due to: Severe wind, extreme temperature difference indoor/outdoor, more than one door, different levels, big halls, high pressure difference, etc.
In those situations a higher performance model is recommended.

As explained, the air curtain selection depends on the installation situation. Here we show 4 different situations from the most favourable to the air curtain to the most unfavourable.

Easy situation

Standard situation

Medium situation

Hard situation