Would you like to seal up your factory door comfortably?

Thermovent air curtains are specially designed for factory doors. Reduce heating costs by avoiding hot air losses and prevent the entry of cold air. The remaining free door opening ensures an unhindered transportation of goods.


Why do you benefit of THERMOVENT air curtains?

Energy savings

Significant reduction in heating costs by avoiding warm air losses at open gates.

Smooth operation by unhindered transport of goods

Convenient and fast, the goods can be transported through the free door opening. Swing doors and strip curtains are no longer necessary.

Hygienically safe

All hygiene requirements of the food industry are met. Contamination of the products by swinging doors or strip curtains is impossible.

Accident prevention

See and be seen is made sure. A dangerous free movement of goods through the air curtain is always guaranteed. Unrestricted view.

Protection against insects

No ingress of insects through doors, which are protected by air curtains. The inflow of dust and smoke is reliably prevented.


The THERMOVENT air curtain system is located above the door and out of the transport area and cannot be damaged by fork lifts mechanically.


How do air curtains work?

A door of moving air.

An air curtain system is a device that prevents an exchange of air through a wall opening, without any physical barrier.

There is an air curtain blower with an air collection box and a discharge nozzle. A door out of moving air. The systems are equipped with a particular air rectifier in the outlet nozzle. There are hundreds of small blowpipes.

The air flow generated by the radial fans is directed through the blow tube rectifier. It is completely laminar, homogeneous and free of turbulence. The beam is narrow and extends far. This jet of air is blown at right angles to the inflowing air, or surrounding. The air jet must be so strong that it reaches to the floor and tears the incoming or adjacent air with it.

Without air curtain


Open door without air curtain

If you open a door of a warehouse or factory gate, cold and heavy air from the outside penetrates at the lower part of the door opening. Warm air escapes to the outside at the upper part of the door.

With air curtain​

fig. 2

Open door with air curtain

Thermovent air curtains create an unique air barrier, in order to avoid, that warm air escapes and cold air infiltrates in the building.

Core beam and sub-beams​

Core beam and sub-beams​
at the correct setting.

Special features

What characterizes THERMOVENT air door systems?

The housing of the air curtain system can be mounted cantilevered over a distance up to 8 meters. During assembly, the system is placed on two brackets, which are mounted next to the door opening. On the brackets, the air curtains can be pushed in an optimal position to the door ope- ning. So the Thermovent is particulary suitable for extra-wide door openings with overhead doors, sliding gates and rolling doors. These doors can move freely behind the air curtain system.
All systems can alternatively be equipped with energy-saving EC fans with electronically commutated electric motors. The EC motors are the result of a very complex development. These motors work with an extremely low power consumption. They are very simple and very suitable for continuous operation and characterized by a very low operating noise. The power consumption at full load is only half as high as of normal motors. When the speed of the blowers is regulated down, the power consumption falls further analogous to the speed.
Whenever the door is opened, a proximity switch activates the air curtain just when the door is removed from the switch. So the fans are already powered up when the door is fully opened. This is a special switch. It is completely sealed without any moving parts. It is totally waterproofed and works with an operating current of only 24 volts. It is a security switch, which cannot cause any electrical accidents.
Thermovent air curtains can be installed on the warm or cold side of the wall above the door. We suggest the installation on the warm side. The blowers draw in warm air from the higher indoor range and blow it through the outlet nozzle with the air rectifier down. This rectifier is made out of hundreds of small blowpipes. In this way a turbulence-free particularly homogeneous air stream is generated. The air stream is sufficient with the large Thermovent type S to reach up to six meter far to the ground. Heating of the air stream for a good function is not neccessary.

The system is controlled electronically.
There is a slide-in control with the electronics and all critical components, such as:

  • The control of the fan speed.
  • The circuit of the fan by contactless relays.
  • The generation of the safety current –
    24 Volt DC – for the proximity switch.
  • The waterproof connector for this switch.


In case of failure, this slide-in control can be pulled by the operator and exchanged with a new one quickly. This eliminates time-consuming troubleshooting and allows a quick repair. So a global fast service is available.

The system is made corrosion-resistant and sound-insulated. The outlet nozzle and the housing consists of a modern sandwich, core material – plastic with painted aluminum surfaces. Very good properties with respect to insulation, corrosion and stability. The blowers have the protection class IP 44 and are galvanized. The remaining Thermovent parts are produced from solid polyethylene – the consoles and all screws – are made from stainless steel. Very long service life, quiet, maintenance-free and reliable.


Assembly variants

Rear wall assembly with normal construction width

The THERMOVENT will be mounted with two stainless steel panels with solid polyamide blocks on the warm side of the wall above the door opening. This is the normal type of installation.

Rear wall assembly with reduction of the construction width

The THERMOVENT will be mounted with two stainless steel brackets on the wall above the door opening. These consoles take up less space in the construction width – but need more space in the height.

Rear wall assembly with variable console distance

The THERMOVENT is mounted with two stainless steel brackets with solid polyamide blocks on the warm side of the wall above the door opening. If you can not mount the brackets in the right distance, it can be corrected by shifting the angle brackets below the polyamide blocks.

Ceiling mounting with mounting under the ceiling

The THERMOVENT will be mounted with two stainless steel brackets under the ceiling above the door opening.

Side mounting with mounting on the side walls

The THERMOVENT will be mounted with two stainless steel panels with polyamide solid plates on the side walls and in front of the door opening. This type of installation is often used in corridors that are sealed off by air curtains against warm air loss.


Catalog air curtain systems for factory doors

THERMOVENT air curtain systems for door heights up to 800 cm

An 24-page booklet that shows the use of THERMOVENT air curtain units of warehouse doors and factory gates. On a calculation example, the significant cost savings shown that is possible through the use of these facilities.

Facilities are available for door heights up to 8 meters and door widths up to 6 meters.


Photos of our air curtains


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Directly to the right contact person

Pietro Mattana

Administration air curtain

FRIGOQUIP Luftschleiertechnik