What you need to know about wall fans 
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Ventilation in residential and commercial buildings is very important, so this element must be taken into account at the design stage. Effective ventilation ducts ensure the proper functioning of the entire building and have a significant impact on the health of the occupants. A variety of models here: https://yanvent.ru/category/nastennye-ventilyatory/ . As we can see, there is a large selection, so what should you look for when choosing a built-in wall fan?
Why do you need a wall fan?
Each room requires adequate ventilation, and in the case of wet rooms, special attention should be paid to this. Moisture, water vapor - these are often difficult to avoid, so proper ventilation is necessary. The fan promotes the exchange of humid air in the room. Fogging of mirrors and windows, as well as condensation, can mean that the ventilation is not working properly. If there is insufficient air circulation, moisture can promote the formation of mold and mildew, which can negatively impact your health. Moisture also has a bad effect on walls and interior decoration elements. The consequences of insufficient ventilation do not appear immediately, but become noticeable over time. This is why a bathroom fan is essential if you want to combat the moisture problem effectively.
How to choose a fan
A commonly used air purification method is gravity ventilation. The air absorbing element is a grille connected to an air duct. This method does not always work as it should because everything depends on external conditions. It is important with what strength and direction the wind blows, atmospheric pressure and temperature. An alternative to gravity installation is mechanical ventilation. It includes a duct fan, axial or other. The fan will work wherever gravity or mechanical installation is provided. This mechanism will support its operation and improve functionality.
How to choose a fan that best performs its function?
Make sure that its efficiency is at least three times greater than the cubic capacity of the ventilated room. This can be calculated by multiplying the area by the height of the room. A fan that allows you to regulate the rotation speed and is equipped with an impeller and a motor would be a good choice. Some models also have string switches, making operation much easier. An exhaust fan with a built-in timer allows you to mechanize the entire system. Humidity or smoke sensors that turn on the ventilation system when permissible standards are exceeded can also be useful.
What parameters should you pay attention to when choosing a fan?
When choosing a fan, you need to pay attention to several parameters that will affect its operation and efficiency. First of all, you need to check whether the motor has a certain class of protection against water. Depending on the installation location, the unit may be exposed to splashing water or chemicals. The efficiency of the fan is also very important because it determines how quickly it completely removes gas, smoke or water vapor from the room. Also pay attention to your overall blood pressure. A more efficient fan must be installed if the room is not connected to an individual gravity ventilation duct.
Selecting a fan by assembly
Fans differ in the installation method. They can be mounted on a wall, ceiling or in a shaft. To install the system, ventilation ducts are used, laid in specially designated areas. A wall fan is installed indoors, where it is responsible for proper air circulation. Wall and ceiling fans also have many useful features. One of them is a damper that opens automatically when the device is turned on. When attaching the fan to a suspended ceiling, quick-release hooks are used. In this case, the air must be vented outside through a flexible ventilation duct. Exhausting air into the attic or above the ceiling can create a backdraft.
Regardless of installation method, remember that the fan should be placed as high as possible. It should be located in front of the air exchange sources and at least 3 centimeters from the ceiling. Since the fan is an electrical device, please contact an electrician before installation to ensure the device is installed safely.
A properly installed fan will help reduce humidity, preserve interior decoration and furniture, avoid filling the room with gases or smoke, and minimize the possibility of mold formation.