Silent fan for bathroom with non-return valve: types, device, selection and installation

Ventilation is an important factor that should not be neglected when designing a bathroom. Many mistakenly believe that it is only needed to remove unpleasant odors. Therefore, it often happens that the ventilation holes are closed during repair, and with unpleasant odors are fought with the help of air fresheners.

Actually, the ventilation function is much wider. It should ensure the normal circulation of air in the room, maintaining a certain level of humidity. This prevents the appearance of condensate, mold, fungus and insects in the bathroom.

Often people refuse a fan in the bathroom because it produces a lot of noise. Just not everyone knows about the existence of low-noise and noiseless models that do not violate the peace of the household at all. We will tell you about these useful and convenient devices in today's article.

In this article we will talk about fans equipped with a non-return valve. It is a small and very simple mechanism that prevents air from entering the ventilation duct back into the room. Check valves are usually made of plastic or stainless steel. They consist of three basic elements - a frame, two shutters, barriers and a pin, to which the doors are attached.

The principle of operation of the check valve, regardless of where it is installed - in the ventilation duct or in the sewage pipe - will be the same. It is designed in such a way that the movement of air( or water) can occur only in one direction. When trying to move in the opposite direction, the air will run into a barrier from tightly closed flaps.

The doors are actuated by the movement of air, which in turn takes place when the fan is switched on. Thus, the air is drawn in until the fan turns off. After disconnection, the doors slam shut, blocking the air back way.

The noiseless fan for the bathroom becomes, thanks to some design features, which we will briefly describe.

• First, the engine's device is provided with special vibration isolating elements that absorb vibration, which is the main source of noise.
• Secondly, manufacturers carefully consider the external appearance of the fan. The air intake grille has a special, streamlined shape. In addition, the choice of the lattice material also plays an important role - the air resistance depends on this.
• Thirdly, noiseless operation is achieved by another bearing model. In addition to noise-absorbing properties, they have a high degree of reliability and do not require additional maintenance( in particular, lubrication treatment).

Manufacturers of domestic ventilation equipment offer three varieties of fans that are suitable for installation in the bathroom:

• radial - large-scale models with a spiral grille, which today prefer to be installed mainly in industrial premises;
• axial - are familiar to each device, which set the air in motion with the help of rotating blades;such fans can provide air inflow and exhaust;
• channel - the quietest of all presented varieties, as they are mounted not on the wall, but directly into the ventilation duct;Thus, the noise of the operating fan simply does not reach us, since the device is in the distance.

In silent fans different types of check valves can be used. Depending on the principle of operation, three types of these devices are distinguished:

• a controlled-type check valve - operates from electricity or is operated manually;
• self-closing check valve - actuated by tensioning or loosening the spring;
• check valve of passive type - works under the influence of gravity, opens only to meet the flow of air.

We offer you an overview of the best models of noiseless bathroom fans equipped with a non-return valve:

• When choosing a fan for a bathroom, several important parameters must be considered, including power, air exchange rate and noise level. Noiseless are devices whose power is within the limits of up to 26 dB.
• The air exchange rate of the fan is determined by the area of ​​the room. More details on how to calculate the necessary air exchange can be found in our article "Ventilation in a wooden house. Features of ventilation in the bathroom.
• For use in rooms with a high level of humidity( which include the toilet and bathroom), you need to choose a waterproof fan model.
• Also pay attention to the availability of additional functions. So, fans are very convenient, equipped with an automatic turn-on timer, a motion sensor( presence) and a humidity sensor.

Self-assembly of the fan - the task is quite feasible, even for those who have minimal experience of repair work. You just need to carefully read the instructions, stock up on the necessary tools and patience.

Easiest to install conventional axial-type overhead fans - these are the ones used in bathrooms most often. They are mounted over the vent with a set of fasteners. In this case, the cross-section of the air intake grate should correspond to the dimensions of the ventilation opening.

To connect the fan to the network, you need to connect the cable from the nearest junction box( if the fan is installed in this room for the first time).Do not forget that the wiring should be completely protected from moisture - the wires can be laid in strobes, hidden in special channels, hidden under a suspended ceiling or a false wall of gypsum board.

In the next Youtube channel video you can see how to mount a noiseless fan in the bathroom yourself.

If the bathroom is equipped with a window, you can try to make a noiseless fan yourself. A self-made fan is attached to the window. He can work on blowing and blowing. At work such fan practically does not make sounds.