Month: April 2022

Industrial exhaust fan are those tools that allow a fluid to move within a network of ducts or within machines or production lines. Just as home fans move the air on hot days, industrial fans move it for various industrial processes.

They are mainly characterized by two quantities:

• Fluid flow rate typically expressed in mc / h
• Total pressure that the fan gives to the fluid to overcome the pressure drops and generally expressed in pa or in mmca (mm of water column)

Adaptation of products for different applications

The world of industrial exhaust fan has evolved and adapted to the production and design needs of the various sectors by offering a wide range of products for different applications.

As you will have understood from my statement, fans are not all the same and above all suppliers are not. Each of them has specialized in making machines suitable for their market and their experience by paying particular attention to some details that others would not even take into consideration.

So, you have to pay close attention both to the choice of the machine but also to find one or more suppliers suitable for your market, your needs and the application.

Having said that, let's say that it is possible to have two large product categories:

• Axial fans
• Centrifugal fans

Industrial exhaust fan: axial and centrifugal fan

From an application point of view, axial fans are mainly common to move huge masses of low head air. We find them mainly in mechanical ventilation units, HVAC, general conditioning or for example in road tunnels.

The centrifugal ones, on the other hand, being able to afford higher performance especially in terms of available head, are common in many industrial applications, both process and auxiliary and we can see them in practically all industrial activities and in all suction, conveyance and emission abatement systems.

How do you know if industrial exhaust fan is axial or centrifugal?

The answer is quite simple and mainly concerns the movement that the air makes as it passes through the fan.

In an axial fan, the air substantially does not undergo any "change of direction" between its inlet and its outlet, as you can clearly see:

Axial fan

In a centrifugal fan the air is "centrifuged" towards the outside. It enters the center of the fan and is then pushed towards the passage left open by the blades. In practice, it performs a 90 ° change of direction between its entrance and exit. Look at the three fans below to understand clearly.

Centrifugal plug fans

The fans in the image above are a particular type of industrial exhaust fan which calls plug fan and characterize by the fact that they do not have a casing or scroll around the impeller which is of the centrifugal type.

This particular conformation places them as a "middle way", from a performance point of view of available head, between axial and centrifugal fans.

They are in fact more performing than the axial ones thanks to the centrifugal impeller, but less performing than the purely centrifugal ones due to the lack of the screw which allows to recover every possible Pascal of pressure produced by the impeller.
 

What “conformation” or better execution, can industrial fans have?

Precisely because of industrial exhaust fan indispensability in production processes where the movement of air or fluids in general is fundamental. There are different "conformations" for how the fans are built, which call executions.

The most common executions common for fans

Everyone knows that a fan is a machine made up of a series of blades that rotate thanks to the thrust of an engine. Industrial fans (as Safe Ventilation explains) work in exactly the same way and mainly concern with passing through the pipes of the industrial ventilation system the polluting gases or dust produced by the various industrial processes.

Industrial exhaust fan generally falls into two main types: axial fans and centrifugal fans. Furthermore, since the world of industry is made up of different sectors, the manufacturers of these machines have specialized by designing a wide range of products suitable for different applications.

Types of industrial fans: axial and centrifugal

Axial fans characterize by propeller fans. This forces the extracted air to move parallel to the shaft around which the blades rotate. It is capable of moving large volumes of air at relatively low pressures. There are three main types of axial fans:

• The ducted axial fans: industrial exhaust fan have the impeller inside a cylindrical housing. It allows to manage high pressures thanks to the higher rotation speed compared to the propeller ones;
• Axial wall-mounted fans: are particularly suitable for ventilating closed environments;
• Axial duct fans: locate inside the ventilation ducts and have many advantages including the ability to manage large gaseous masses. It reduces noise or high-pressure stability.
• Centrifugal fans: on the other hand, use the centrifugal force produced by a rotating disk formed by blades mounted at right angles. This allows the air to extract perpendicularly to the angle of intake by the industrial exhaust fan. It causes the air to rotate up to the outlet by deflection or centrifugal force.
• The impeller blades of this type of industrial fans can be: positive, negative or reverse (curved back), straight (radial). For this reason, there are four main types of centrifugal fans:
• Forward curved centrifugal fans: are suitable for treating dusty gases but have a rather low efficiency;
• Centrifugal fans with radial blades: they have a lower power; therefore, they consider the least efficient, however the version with open blades is very performing;
• Backward curved centrifugal fans: they are mainly common to suck in slightly dusty or clean air and are the most performing thanks to the very low noise and low energy consumption industrial exhaust fan guarantee;
• The scirocco blade centrifugal fans: it is capable of sucking up rather large volumes, but it does not have an excellent efficiency.

Differences between axial and centrifugal industrial fans

There are substantial differences between axial and centrifugal industrial fans that can summarize schematically. So, let's see how they differ:

• Operating speed: an axial fan has a decidedly higher operating speed than the centrifugal one;
• Impeller diameter: an axial fan has a smaller impeller diameter than a centrifugal one;
• Efficiency: an axial fan has a lower efficiency than a centrifugal one and therefore results in greater energy consumption;
• Noise: an axial fan is much louder than a centrifugal one;
• Pressure: an axial fan has a higher dynamic pressure than a centrifugal one;
• Peripheral speed: an axial fan has a higher peripheral speed than a centrifugal one.

How to choose an industrial exhaust fan?

There are two fundamental parameters to keep in mind when choosing the most suitable industrial fans:

• The flow rate of the fluid;
• The total pressure that the fan is able to impart to the fluid to overcome the pressure drops of the circuit to which it connects.

To identify the appropriate industrial fan, it is necessary to cross the flow-pressure curve of the fan and the flow-pressure curve of the circuit. The point of intersection between the two curves will indicate the fundamental performances that the industrial exhaust fan must have.

There are different types of bathroom exhaust fan with led light even if their operation is practically the same. Here is a reminder that will come in handy.

Best vacuum cleaner for bathroom

It can happen very often that in our homes there is a blind bathroom, i.e. without a window. Fortunately, this is no longer a problem: we can choose from many types of bathroom vacuum cleaners. This allows us to have a continuous exchange of air, necessary for this room.

Let's face it, a good intake fan for this room not only improves the air quality by eliminating stagnant odors. Bathroom exhaust fan with led light also manages to eliminate humidity. This is responsible for condensation and molds that are difficult to eliminate - and to remove bacteria and viruses in the air. This is why it is essential to know how to choose a good fan, also based on the characteristics of our bathroom.

If you are having difficulty choosing and are afraid of making mistakes, why not contact our experts? In addition to targeted advice, they will be able to provide you with free estimates for the system you are looking for and installation: do not waste time, request them now!

How to choose the right bathroom exhaust fan with led light?

There are different types of bathroom vacuum cleaners, even if their operation is practically the same: the fan sucks in the air present in the environment and - through a duct - leads it outside. Therefore, for this to work, the fan must be connected to both the electrical system and a vent channel.

Now let's see the parameters to take into consideration to choose the most suitable exhaust fan for our needs.

Motor power and air flow

Obviously, a larger bathroom contains more air to move: for reference, consider that a suction fan with a power of 15 watts can move 90 cubic meters per hour, therefore it is suitable for a medium-sized bathroom. For small bathrooms - or half bathrooms - even an 8- or 4- bathroom exhaust fan with led light can do the trick.

Aspiration speed

For large bathrooms it is more appropriate to opt for a 2-speed exhaust fan, adjustable with a switch or by turning on the light. A basic version with only one speed is also suitable for a small or service bathroom.

Noisiness

It may seem like a secondary factor, but it's not at all! If - for example - the bathroom is common at night, the risk is to disturb the sleep of the tenants, so let's not underestimate the noise level of the fan.

Bathroom exhaust fan with led light: aesthetics and shape of the blades

If we have a modern and design bathroom, surely, we will also have to take care of the appearance of the vacuum cleaner. On the market there are some particularly well-finished from this point of view, obviously the price tends to be a little higher.

We always try to combine our needs with our desires. The shape of the blades of the intake fan is not only an aesthetic element. In fact if we choose blades with an airfoil, we will be able to move greater quantities of air. This solution is also among the most silent.

Where to place the exhaust fan?

Once we have chosen the best bathroom exhaust fan with led light for our needs, the last thing remains to be clarified: where should it be positioned? We cannot provide a single answer, because it depends on many factors. First of all - as we said before - it must connect both with the outside and with the electrical system. Moreover, you have to choose the right point for the connections.

If every corner of the bathroom can be suitable for connections, then we choose to place the exhaust fan in the points where it is most necessary. Bathroom exhaust fan with led light can immediately suck in the vapors of hot water and therefore prevent the formation of condensation from humidity and molds.

 

A variety of household exhaust fans of different types and capacities

We often hear about the need for ventilation in any room, but it is not always possible to know exactly when and what systems to install. We will deal with the situation when high-quality ventilation in the bathroom is necessary.

Many manufacturers offer a variety of household exhaust fans of different types and capacities for ventilation in the bathroom or bathroom.

Among others, it is often suggested to install a bathroom exhaust fan with led light with a non-return valve, thereby quickly solving the problem that often arises due to the nature of such rooms. But everything is not so simple - buying any device does not mean solving all the issues.

Here you need to approach with the correct selection method, as well as determine whether such a unit is exactly good or you can do it in a natural way.

Reasons for installing a fan in bathrooms and bathrooms

Often in the bathrooms of apartments you can find such nuances:

• Bad smell in the room, which comes from the central shaft;
• Poor natural draft, which forms stale air;
• The mine of a residential complex is clogged;
• Lack of supply air.

Naturally, as a result of this, many problems appear which then disturb the owners of the apartment and do not give them peace. If, after a shower or taking a bath, condensation and dampness appear, which linger on walls or furniture for a long time, corners darken or become covered with dangerous spots, mustiness and high humidity are felt.

Bathroom exhaust fan with led light: urgent action to improve ventilation

Natural methods will no longer be able to restore the desired balance. All these are reasons for concern and urgent action to improve ventilation.

It won't be possible to get rid of fungus and mold if the bathroom has proper ventilation. There is no need to talk about the health consequences for large and, especially, small inhabitants of an apartment or house.

After you have noticed such problems, you can call a specialist at home who will assess the whole situation. You can simply attach a piece of paper to the hole of the bathroom exhaust fan with led light duct, and if it quietly fell down, we come to a disappointing conclusion. The removal of air from the room is very weak.