- Factories & Manufacturing
- Distribution Centers
- Repair shops
- Industrial ovens
- Reduces heating and cooling costs by up to 80% while protecting the internal climate and increasing comfort;
- Keeps the atmosphere clean from pests and insects, dust, airborne, pollution, smells and odours, and stops drafts and cold or hot air from entering.
- Increases production and transportation efficiency without the need for frequent opening and closing of doors.
- Enhanced safety without solid material blockage of doors.
HOW IT WORKS
A direct-fired air curtain works just like a direct-fired space heater. A directionally controlled high velocity airstream, moving across the entire height and width of an opening, which reduces the infiltration or transfer of air from one side of the opening to the other and/or inhibits flying insects, dust or debris from passing through.
- Powerful centrifugal blowers delivering high-velocity airstream
- Semi-enclosure or full-enclosure equipment available
- Horizontal or Side installation configurations available
- Can be interlocked with door opening&closing
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 compatibility: Always open, automatic open, manual open, 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.
The information within this section has been designed as a ‘quick check’ for non-technical
stakeholders to confirm that their air curtains have been installed in an appropriate and functional
way. These checks are not comprehensive and should not replace the manufacturer’s installation
HOW FAR IS THE AIR CURTAIN FROM THE DOOR HORIZONTALLY?
An air curtain should be installed close enough to the opening to prevent heat loss from cold air entering the space or vice versa for cold room applications. As shown in the diagram below, in an ideal installation, there would be no separation horizontally between the opening and the air curtain. However, the air curtain can still be effective provided the separation is within 50 cm.
HOW FAR AWAY IS THE AIR CURTAIN FROM THE DOOR VERTICALLY?
Ideally, the outlet of an air curtain is installed directly above the opening it is designed to protect.
If an air curtain is installed too far above the opening, the result will be one of the following
two outcomes: the air curtain may not be fully effective or a larger more powerful unit may be
required. Both these outcomes are a consequence of the energy required to create and maintain
the jet of air across the opening. As a general check, unless the additional height has been taken
into consideration, a vertical separation of up to 50 cm is acceptable
DOES THE AIR CURTAIN COVER THE ENTIRE WIDTH OF THE DOOR OPENING?
In an appropriate installation, the stream of air generated by the air curtain should cover the entire
opening it has been installed to protect. If the air curtain is oversized, it will use additional energy
without providing any additional benefit to the consumer. If the air curtain is undersized, it cannot
create an air stream large enough to fully protect the opening it has been installed above, leading
to increase space heating or cooling costs as a result of infiltration.