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Fans 

Fans: specifications, types

Type

Desktop. Small models designed to be placed on a tabletop. Usually, they have low power and are designed primarily for the person directly sitting at the table. among those, there are also portable options ( mini-fans), which are not powered by the mains and are available for use not only at the table.

— Outdoor. Fans intended for installation on the floor. There are two types. Floor-standing without legs are distinguished by a large diameter of the blades and high power, and also do not have the ability to adjust the direction and always blow in one direction. Floor on the leg — a classic version of home ones, which also have large blades located at a height of more than a metre from the floor and are able to rotate around the leg, which allows you to ventilate the entire room.

Wall mounted. Fans equipped with special devices that allow them to be mounted on the wall. The power of such fans is comparable to floor fans, and the advantage is that their installation does not require free space on the floor, which can be critical in small areas. On the other hand, wall mounting is anyway much more difficult than floor mounting.

— Universal 3 in 1. Universal models have the ability to transform for use as a floor, table or wall fan, which can be useful when used in confined spaces. The i...mplementation of the design itself may be different, but usually, a stand for placement on a table, a wall mount and a leg with a base for floor placement are included.

Ceiling. With the help of a special mounting, this type of fans are installed directly under the ceiling, have large blades and have high performance. This is one of the most efficient types of fan, able to provide excellent air flow, and in winter, such a device directs warm air downwards. But due to its large size, it is not very popular as a home solution.

Power source

The presence of an autonomous way to power the device. Applicable for portable mini-fans, since stationary ones are powered by 220 V mains. There are two ways to feed:

- USB port. Models designed to be installed near the PC workplace for the "service" of one person. And it's not a problem to find a USB port, both in a PC, a laptop, and in a Power bank.

- Battery. Portable models that do not need a power supply and can be used freely even outdoors. The built-in battery allows them to work for a long time. Naturally, the power of such fans is small and, like any battery technology, they need to be recharged and can be discharged at the most inopportune moment.

Mechanism

Axial fans are called models of classical design — equipped with blades. Such models are simpler and cheaper, but less safe and not suitable for creating an extensive ventilation system. Radial fans are a bladed wheel hidden in a protective casing. Such designs are safer, but more complex and expensive, and are also better suited for ventilation of complex rooms.

Relatively recently, a third type of fan was created — rotorless. Outwardly, such a device looks like a ring on a stand. The ring is hollow from the inside; when the fan is running, air circulates inside, which, thanks to special slots, entrains air from outside, driving it through the ring. Unlike other types, rotorless fans create a smooth, uniform air flow without noticeable disturbances; moreover, they do not have any moving parts on the outside and are thus the safest. However, these devices are very expensive.

Power consumption

The maximum power consumed by the fan during operation. The higher the power consumption, the higher, usually, the greater the air flow rate created by the fan, and, accordingly, the higher the performance of the device. On the other hand, power usually directly affects the price, all other things being equal.

Number of speeds

The number of preset speeds at which the fan blades can rotate. The adjustment system with preset speeds is called stepping; with such control, the rotation speed is usually set by pressing the corresponding button (in addition, there is also a smooth adjustment, see the relevant paragraph). Most modern models with step adjustment have three preset speeds.

Performance

The maximum performance provided by the fan — that is, the maximum amount of air that it can pass through itself in an hour.

The performance is selected by manufacturers, taking into account the area and, accordingly, the volume of the room for which the device is designed. For efficient operation, it is necessary that the device is able to pass the entire volume of processed air through itself at least once per hour. At the same time, for models with the same area of the room, different performance indicators can be claimed — accordingly, the processing speed and efficiency will differ.

Also note that the recommended area of the room can be estimated by performance, if the latter is not stated in the characteristics. For example, if the device provides 200 m³ / h, this means that the volume of the room can be less than 200 m³, which, with a standard ceiling height of 2.5 m, gives an area of 200/2.5 = 80 m². And ideally, the area should be even 2-3 times smaller — that is, be about 25-40 m².

Air flow

Range of effective finishing of the air flow from the fan blades (in metres). The higher it is, the more powerful the device in front of us.

Min. noise level

The maximum volume of the sound produced by the fan when running at low speed. It is good to know this value especially in the conditions of operation of the device at night or in rooms that need special silence.

Maximum noise level

The maximum volume of the sound produced by the fan when operating at the highest speed. For comparison: a noise of 30 dB corresponds to a distinguishable whisper at a distance of 5 m, 40 dB — to human speech, 50 dB — to the sound background in an office room. The quieter the fan runs, the more comfortable it is to use.

Functions

Smooth adjustment. The ability to adjust the rotation speed when a slider is used instead of several buttons. In this case, you can set the speed not step by step, but over a wide range.

— Rotary system. Thanks to the rotary system, the fan is able to change the direction of the air flow in a horizontal plane, while remaining stationary. The direction can be set manually, and it can also change automatically when the fan constantly changes direction. Fans with small blade diameters usually do not have this capability.

3D rotation. Automatic rotation is assumed not only in the horizontal plane, but also vertically. The implementation of this function is different: horizontal and vertical movements can be alternate, or the “head” of the fan can make spherical movements. Fans with 3D rotation are better at mixing air, and when used in conjunction with an air conditioner, better cooling efficiency is achieved.

Night mode. Designed to reduce noise levels, fans in this mode reduce the speed to a minimum and periodically turn off the rotation of the blades. Note that in this mode you will have to sacrifice the power of the blower and in hot weather this mode may not be relevant.

Imitation of the wind. This mode of operation periodically changes the speed of rotation of the bl...ades, sometimes turning them off altogether, creating gusts of wind. Different manufacturers call this mode differently: comfort mode, breeze mode, natural, and the like, but they all serve the same purpose.

Height adjustment. The ability to independently change the height of the fan manually. Provided, usually, in floor models.

Tilt adjustment. The ability to change the angle of inclination of the air flow in the vertical plane. In the vast majority of models, it is set manually, but there are models that can change it automatically. Simple and inexpensive models often lack this capability.

Timer. A device that automatically turns off the fan after a certain time set by the user. The presence of a timer allows, for example, to turn on the fan at night and go to bed peacefully — the device will turn itself off at the right time.

Remote control. Possibility to control the fan from a distance. Advanced fan models are equipped with remote controls that allow you not only to turn the device on and off, but also to adjust the speed and set the timer value.

Smartphone control. Fans that support this feature can connect to your home Wi-Fi network and be controlled directly from your phone app. Also, some models can be integrated into smart home systems to perform certain scenarios. There are models in which this function completely replaces the remote control.

Hydration. Fans with this function are actually a hybrid of a classic fan and a humidifier. They have a reservoir with water and a device that supplies water vapor to the fan blades, where it is carried around the room by air flow. In general, such a combination is more effective than classic humidifiers, as it provides the most even distribution of moisture, however, fans with humidification are quite rare.

— Ionization. The presence of a built-in air ionizer. It is believed that air saturated with negatively charged oxygen ions is extremely beneficial for health. Not all fan models (even expensive ones) are equipped with an ionizer. However, it can also be purchased separately.

Built-in lamp. The presence in the ceiling fan of the LED panel or socles for connecting lamps. This solution allows one device to replace both the chandelier and the fan.

Fastening on a clip. Such a device allows, for example, to fix the fan on the edge of the wall shelf opposite the face, which will not only create a more pleasant air flow, but also save space on the desktop surface (and even on the shelf where the fan is installed). In addition, such a mount is more reliable than a simple installation on a horizontal surface — accidentally dropping a fan mounted on a clip is much more difficult than standing on a table or on a shelf.

Display. A small external screen designed to display various service information. The display can show data on the operating mode, the set timer, the time until the fan is turned off, etc. The display makes fan control more convenient, but other things being equal, such devices are usually more expensive.

3D rotation

The ability to automatically rotate the "head" of the fan both vertically and horizontally. These movements can be alternate or spherical. The 3D-rotation system ensures uniform air circulation around the perimeter of the serviced premises.

night mode

"Quiet" fan operation mode with a reduced noise threshold. It is achieved by reducing the rate of rotation of the blades and their periodic shutdown. In night mode, the fan operates almost silently, without disturbing the sensitive sleep of the household. However, due to the reduced air flow in hot weather, the cooling efficiency drops.

wind simulation

This feature simulates the natural flow of the wind. Imitation of the breath of the wind occurs by periodically changing direction and changing the strength of the blowing.

smartphone control

The ability to remotely control the operation of the "wind blower" through a mobile application on a smartphone. For some models, this function replaces the use of a remote control, for others it allows the fan to be integrated into the smart home ecosystem.

Blade diameter

The larger the blade diameter, the more airflow the fan can produce, at a lower RPM (and therefore less noise). But it also increases in size. Large diameter blades are usually floor models.

Number of blades

Ceteris paribus (same power and impeller width), fans with numerous blades can boast of greater air mass distillation performance. However, in general, the formation of a powerful air flow is not affected by the number of blades, but by their diameter. In addition, the operation of multi-bladed fans is usually associated with an increased level of noise.

Metal structure

Fans on a metal chassis are distinguished by a reliable and high-strength design. They stand steadily on different types of surfaces, have an exquisite appearance, but are heavier than their counterparts with plastic cases. Often such fans are equipped with a guard grills and blades also made of metal.

Wood decoration

Decorative wood trim of the fan housing elements. Wooden details emphasize the noble appearance of the device and are often used to style the fan in antique style. Also under this item fall ceiling models with blades made of MDF or wood.

Base

Cross. The most common type of base for floor standing fans, it provides sufficient stability while maintaining a lightweight design. Also fans with a cross are usually cheaper than others. Of the advantages, a collapsible design can be noted, which creates additional convenience for storage or transportation.

Disk. This type of base is massive, usually, such discs at the base can weigh 3-5 kg, depending on the fan model. They are made from various materials, usually the disk itself comes as a separate part of the structure, on which a decorative overlay is put on top. It is believed that such a base provides better stability than many cruciform bases, but here it also all depends on the execution.

Tripod. The least common type of base, in which, apart from the aesthetic component, there is nothing else. In terms of structure, such models are too voluminous, and in terms of reliability they are at the level of models with a disk.

Min. height

The lower level of placement of the "head" of the fan with blades for models with a height adjustment function. The parameter is found mainly among floor-type models. It defines the minimum height of the fan in relation to the floor level.

Maximum height

The maximum position in height relative to the plane of the surface on which the fan is installed. Most often, the parameter is indicated for floor models with the ability to adjust the height.
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