An Air Curtain, also known as an air door, is a machine that blows a controlled stream of air across an opening to the other side to create an air seal. This seal separates different environments while allowing a smooth, uninterrupted flow of traffic and unobstructed vision through the opening. Because they help to contain heated or conditioned air, they provide sizable energy savings and increased personal comfort when applied in industrial or commercial settings. They also help to stop the infiltration of pollutants and flying insects.

How Does an Air Curtain Work?

Once it is powered on, air is brought into the unit through the intake

The air then enters the fan housing and is accelerated by the fan.

This fast-moving air goes into a plenum, which allows for an even distribution of air along the full length of the discharge nozzle.

Airfoil-shaped vanes in the nozzle create a uniform air stream with minimal turbulence.

The air discharged through the nozzle creates a jet stream to the floor. Approximately 80% of the air returns to the intake side of the Air Curtain Door, and 20% goes in the opposite direction.

Why Use an Air Curtain?

Energy savings through control of air transfer

Energy savings due to shorter run times of air handler or compressor

Safe environment support by increasing ventilation and de-stratifying the air

Maintain employee/customer comfort

Reduce flying insect infiltration

Unhindered traffic flow & unobstructed visibility across the threshold

Increase productivity due to stable temperatures

Maintain usable space around the door

Elimination of ice and fog in cold storage areas

Do Air Curtains Cool a Room?

While Air Curtain Blowers are not the same as air conditioners, they are highly effective at maintaining the interior temperature, keeping cool air inside and warm air outside (or vice versa) when the door is open. They are sometimes referred to as “invisible doors” as they create an invisible barrier between inside and outside environments. Because they help to contain heated or conditioned air, they provide sizable energy savings and increased personal comfort when applied in industrial or commercial settings.

Do Air Curtains Keep Flies Out?

Yes! And mosquitos, yellowjackets, and bees. Air Curtain Fans, sometimes referred to as fly fans, supply a high velocity stream of air across a door or window opening that keeps pests like insects from entering the building. These flies and other small insects, find the air stream too powerful for them to fly through and if they try, they are blown down or sideways before they can enter the building.

How Much Does an Air Curtain Cost?

Electric Air Curtains can range in price depending on features, the application, and specific requirements. Consult a Berner sales rep today to get pricing on a model and control package that is best suited for your project.

Air Coolers, also known as evaporative or swamp coolers, cool an atmosphere by evaporating water. As air flows over water, certain particles on the water's surface are carried away. These particles take the heat with them, and this allows the air to cool. This is the main mechanism behind air coolers. Continue reading the article to know more about them.

How Does Air Cooler Work With Water?

Sweating also functions in the same way: the water particles on the skin's surface bring heat away with them as they evaporate, cooling the skin. It is also known that these air coolers are able to make use of 75% less energy as compared to the central air conditioners.

Evaporative coolers come in a variety of styles. A fine mist is sprayed into the air and then whipped out by a fan in some methods. Since the water in this mist is made up of fine droplets, it evaporates easily and absorbs heat from the air. In some other methods, the air is made to blow through a material that has been wetted. It can be blown through a fine mesh or past wet sheets, for example. This wet material then cools as it evaporates, and this, in turn, cools the air.


Ventilating a building simply replaces stale or foul air with clean, fresh air. Although the ventilation process is required for many different applications, the airflow fundamentals never change: Undesired air out, fresh air in. The key variables that do change depending on applications are the fan model and the air volume flow rate (CFM). Other considerations include the resistance to airflow (static pressure or SP) and sound produced by the fan (Sones). Sometimes you need a Exhaust Fan to perform a particular function, but it’s not clear which model to use or even what CFM is needed. If this is the case, you’ll need to do some fan specification work. Fan specification is not an exact science, but it can be done confidently when the fan application is understood.

Fans all perform the basic function of moving air from one space to another. But the great diversity of fan applications creates the need for manufacturers to develop many different models. Each model has benefits for certain applications, providing the most economical means of performing the air movement function. The trick for most users is sorting through all of the models available to find one that is suitable for their needs. Here are some guidelines.


An indoor Air Purifier ensures the filtration of air within an enclosed/closed place, which is processed then released as purified air. It operates as a complement to natural ventilation where it is possible to open windows.


It is vital to distinguish a professional model from a consumer device: they do not both guarantee identical air treatment or comparable overall performance.

A professional air purifier, equipped with a HEPA 13 or 14 filter, will operate effectively on pollens, fine particles PM2.5 and PM10, VOCs (Volatile Organic Compounds), viruses and bacteria. Finally, the device’s benign operation is key: that is to say the air purifier itself does not generate any secondary pollutants. To limit the diffusion of harmful residues, allergens or even viral elements; prevent asthma or allergy problems linked to poor indoor air quality to people at risk (children, elderly or sensitive people).

A Home Air Purifier, not to be confused with an air ioniser or air humidifier, can be used as a preventative and/or therapeutic measure: at home, in enclosed offices, open spaces or coworking sites, shops, hairdressing salons, hotels or restaurants, medical and paramedical offices… By extension, as Covid-19 is obliging us, it is assuming an expanding r?le in schools, hospitals, medical and paramedical sectors, services.