# Ventilation In The Bathroom: Calculation, Selection And Options For The Device Of Natural And Forced Systems

## Video: Ventilation In The Bathroom: Calculation, Selection And Options For The Device Of Natural And Forced Systems

• Which ventilation to choose
• Air condition standards
• Choosing the right fan
• Fan selection by connection
• Calculation of the required ventilation capacity
• Self-assembly of ventilation
• Conclusion

One of the main problems that can be encountered with a long explication of a bathroom is a large amount of moisture and heat, which later become the cause of mold and corrosion of finishing materials. In order to avoid such an outcome, it is necessary to take care of high-quality ventilation of the room. Accordingly, you need to know how ventilation is arranged in the bathroom, and how to arrange it correctly.

## Which ventilation to choose

To begin with, it is worth considering what kind of ventilation is, and deciding which type to choose.

In total, there are two options:

1. Natural system.
2. Forced.

Each of them has its own characteristics that should be considered.

Natural ventilation in the bathroom must be provided even during the arrangement (in the design project of the room).

It represents ventilation shafts that are mounted indoors and then closed with decorative grilles. A check valve is also provided that block the path of air to other rooms.

In this case, fresh air enters the room through the grill in the door or through the gap in the door frame. It is worth noting that natural ventilation is quite enough for full-fledged dirty air from a room in a one-story building.

But in the event that the building has several floors, then it is imperative to provide for forced ventilation, for this the general system is equipped with special fans.

## Air condition standards

An important factor is the arrangement of ventilation in such a way that it maintains a normal air condition. Among the norms, it is worth noting:

1. Air movement no more than 30 centimeters per second.
2. Humidity up to 65%.
3. The air temperature in winter is 18 degrees, in summer 25.
4. Directly, the level of air exchange should reach 25 cubic meters per hour for a bathroom, in the case of combination with a toilet 50 meters.

We also note the required level of air exchange for the use of individual plumbing elements:

1. Bath, shower or jacuzzi - 75 meters.
2. Sink - 25.
3. Toilet bowl - 50.

It is important to consider that these are indicators for determining the required level of air exchange in general, but note that plumbing fixtures are not used all together and around the clock. Therefore, to ensure the necessary exchange, the fans are installed with a capacity of no more than 110 cubic meters per hour.

## Choosing the right fan

In order to choose the right fan for bathroom ventilation, a number of factors must be considered, namely:

1. Fan noise. This parameter can be found directly upon purchase, it is indicated on the package. This indicator is measured in decibels. Usually good fans have a noise level of at least 40 dB. It should be noted that this noise is almost imperceptible.
2. The second factor is the engine. It can be combined on bearings or on a bushing. The first option becomes the best; such a device is quieter and more reliable.
3. The next factor is the performance of the fan. It is determined by the volume of air. For the correct choice of this value, it is necessary to carry out calculations, namely, to calculate the volume (we will talk about how to do this a little later).
4. And the last factor is the connection option.

And now let's take a closer look at the last two factors.

### Fan selection by connection

In total, several ways are noted:

1. Connection to the switch. In this case, the fan starts working when the light in the room is turned on. Accordingly, when it is turned off, the operation stops.
2. The next is the arrangement of a separate switch for the ventilation system. Thus, you can independently activate the system, and turn it off.
3. The third option is automatic operation. In this case, the system will start working when the humidity level is exceeded, which is measured by a special sensor. Work continues until the microclimate in the room returns to normal.
4. And the last thing is to set the timer. In this case, the connection is carried out in the same way as in the first, but a timer is additionally set. Thus, after turning off the light, the device works depending on the setting for a certain time.

A combination of systems is also possible, therefore, the best option is considered to be an installation with the possibility of self-activation, while with additional installation of a humidity sensor. This decision is due to the fact that the ventilation will maintain the necessary microclimate, and in addition, it can be turned on manually, in the presence of unpleasant odors for the speedy weathering.

### Calculation of the required ventilation capacity

As mentioned earlier, the selection of the required system performance becomes an important factor, which is done by simple calculations. They are performed as follows:

1. We calculate the volume of the room, for which it is necessary to multiply the length, width and height.
2. After that, the resulting value must be multiplied by the air exchange rate. This indicator indicates how many times per hour complete air circulation should be carried out.

The multiplicity index depends on several factors:

1. Room humidity.
2. The intensity of use.

Standard values:

1. For the bathroom - 0.8.
2. For the toilet - 0.875
3. For the combined dignity. knot index 0.9

Thus, by multiplying the volume of the room by the frequency of air exchange, you will get the fan power. For example, for a room 2.5 * 3 meters with a standard ceiling height of 3m, the indicators will be as follows:

1. 2.5 * 3 * 3 = 22.5 (m 3)
2. 22.5 * 0.9 = 20.25 (m 3 / h)

Thus, for a small bathroom, a fan with a capacity of slightly more than 20.25 m 3 / h is suitable.

Calculate the performance and fan power for a room with an online calculator.

## Self-assembly of ventilation

Now let's look at how to equip ventilation in the bathroom with your own hands. Ventilation ducts should already be provided, and in this case we only need to purchase and install a fan.

Before installing the device, you need to know a few features:

1. It should be located at the maximum height.
2. In addition, the location of the ventilation should be as far away from the air source as possible, otherwise it will have no effect.
3. The device must be mounted as far as possible from the water source, since there is a risk of a short circuit, and therefore a fire.
4. The installation itself causes some difficulties, therefore it is necessary to think about it in advance, even before the finishing device. Otherwise, the wiring will remain in plain sight, which can then be hidden only during repairs.

And now we will consider directly the installation process itself:

1. Remove the decorative mesh that hides the ventilation shaft. It is usually secured with several screws, which can be easily removed with a regular screwdriver.

2. We prepare the fan itself. You can fix it in two ways, using anchors, as well as building glue.

3. An easier way would be to use glue. It is applied around the perimeter of the fan cover.
4. A special polymer glue is used for this.

5. After application, immediately insert it into the ventilation channel, press the lid to the surface (for a few seconds), and then take it out.

6. After a minute (so that the glue starts to set a little), we insert the mechanism into the place intended for it and press it tightly.
7. If power supply is not provided in the ventilation system shaft, then the device can be connected to the lamp. To do this, remove the lighting fixture.

8. From it we mark the location of the cable box, then cut it out and glue it.
9. It is glued with the same glue as the fan.

10. Now you need to pull the cable to connect. Disconnect the power supply in the room beforehand.
11. We connect the cable from one side to the contacts of the lighting device, for which we use terminals or a special adapter (you cannot twist the rock).

12. Now you need to connect the second horse. To do this, remove the blades of the device, there is a connection point under them.

13. We bring the wires to the terminal, and we twist the device back.

14. We check the operability, if everything is in order, then you can screw on the lid and fix the lamp back.

This completes the ventilation device.

## Conclusion

Remember, choosing the right ventilation system, in particular, the fans is very important. Since the absence of such equipment can soon lead to the appearance of an odor in the apartment, fungus and corrosion of materials. We offer to visually watch the video on how to install the fan yourself.

Video:

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