What you need to know about bathroom wall fans 
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Ventilation in residential and commercial buildings is very important, so this element must be taken into account during the design phase. Efficient ventilation ducts ensure the correct operation of the entire building and have a significant impact on the health of residents. A variety of models are here: https://yanvent.ru/category/nastennye-ventilyatory/ . The choice, as you can see, is large, so what to look for when choosing a bathroom fan?
Why do you need a fan in the bathroom
Each room requires adequate ventilation, but in the case of a bathroom, this should be taken into account. Moisture, water vapor - these are difficult to avoid in the bathroom, so proper ventilation is essential. The bathroom fan promotes the exchange of humid air in the room. Fogging mirrors and windows and condensation can mean that the ventilation in the bathroom is not working properly. If there is insufficient air circulation, moisture can contribute to the formation of mold and mildew, which are detrimental to health. Moisture also has a bad effect on walls and interior decoration elements. The effects of insufficient ventilation do not appear immediately, but become noticeable over time. This is why a bathroom fan is essential if you want to deal effectively with humidity problems.
How to choose a fan
The commonly used air purification method is gravity ventilation. The air absorbing element is a grill connected to the duct. This method does not always work as it should, because everything depends on external conditions. It is important with what force and direction the wind blows, atmospheric pressure and temperature. Mechanical ventilation is an alternative to gravity installation. It includes a duct fan for the bathroom, axial or other. The bathroom fan will work wherever gravity or mechanical installation is foreseen. This mechanism will keep it running and improve functionality.
How do you choose the fan that best fulfills its function?
Make sure that its efficiency exceeds the volume of the bathroom at least three times. This can be calculated by multiplying the area and height of the room. A variable speed fan, equipped with an impeller and a motor, is a good choice for the bathroom. Some models also have string switches, making operation much easier. An exhaust fan for the bathroom with a built-in timer allows you to mechanize the entire system. A humidity sensor is also very useful, which turns on the ventilation system when the permissible humidity levels are exceeded.
What parameters should you pay attention to when choosing a bathroom fan
When choosing a bathroom fan, you need to pay attention to several parameters that will affect its performance and efficiency. First of all, it is necessary to check whether the motor has a certain class of protection against water. The bathroom fan, depending on the specific location where it is installed, may be exposed to splashing water. The efficiency of the fan is also very important as it determines how quickly it removes water vapor. Also pay attention to the total pressure. A more efficient fan must be installed if the bathroom is not connected to an individual gravity ventilation duct.
Fan selection by assembly
Fans differ in the way they are installed. They can be mounted on a wall, ceiling or in a shaft. For the installation of the system, ventilation ducts are used, laid in specially designated places. The wall fan is installed indoors, where it is responsible for proper air circulation. Wall and ceiling fans also offer many useful features. One of them is a flap that opens automatically when the device is turned on. Quick-release hooks are used when attaching the fan to a suspended ceiling. In this case, the air must be discharged to the outside through a flexible ventilation duct. Exhausting air to the attic or above the ceiling can create back draft.
Regardless of the installation method, remember to place the fan as high as possible. It should be located in front of air exchange sources and at least 3 centimeters from the ceiling. As the fan is an electrical device, consult an electrician before installation to ensure that the unit is installed safely.
A properly installed fan will help reduce humidity in the bathroom and minimize the possibility of mold growth.