How to install the fan in the toilet or bathroom

According to the rules of GOST 50571.11, the use of electrical devices on the territory of sanitary facilities is strictly limited. At a sufficient distance from water sources, it is allowed, using special techniques, to use devices with a power of 220 V. The room itself is divided into zones, and the installation of devices is carried out according to the boundaries. It is much more convenient to install a DC exhaust fan. For example, 12 V. In this case, most of the restrictions are removed, and the question of how to properly install the fan in the toilet or bathroom is solved very simply.

Where it is allowed to install an exhaust fan in the bathroom or toilet

We’ll just make a reservation that today we are talking about exhaust fans. With the help of instruments, the air becomes fresh, clean, not as wet as after bath procedures. In previous reviews, it was said that it is better to install a fan in the toilet or bathroom with a capacity of at least 25 cubic meters per hour. In the case of combined bathroom doubles figure. We believe that readers have already chosen a suitable model, therefore, only the correct installation of fans is being discussed today. Recall that the bathroom is divided into zones according to the order:

1. . The zero zone takes the volume of the bath or shower tray itself.
2. The first zone is located inside the perimeter of the bath or shower tray, located below( to the floor) and above( to the horizontal plane at a height of 2.25 meters).
3. The second zone begins beyond the first, the distant borders are 60 cm away from it. The height is the same.
4. The third zone diverges from the second by 2.4 meters, the height is the same.
5. Please note that the areas are formed by straight planes and rectangular in shape. An exception is the case when a round whirlpool is installed. Here and the areas diverge concentrically and evenly. You should carefully connect the switches of the fans. The bathroom is not set at all. GOST 50571.11 requires electrical equipment to be installed not “where necessary”, but according to the recommendations:

• In zones 0.1 and 2, installation of a fan( in the bathroom) at 220 V is unacceptable. It turns out, the device is placed above 2.25 meters( bottom).There are no restrictions, but restrictions remain.
• Complications can be avoided if you switch to powering an exhaust fan using BSNN.This means that the voltage is not higher than 50 V AC or 120 V DC.We recommend using 12 V( fixed or variable).

They say there are no low-voltage exhaust fans on sale. It is easy to look at examples of models here https: //www.roomklimat.ru/section/5/ 61-bytovye-ventilyatory-dlya-sanuzlov /( select the option “12 Volt” in the Type field), for convincingness we give the name of the product of the famous brand Soler & Palau: SILENT-100 CZ Silver 12V.You can install a fan in the bathroom of this kind or slightly different. The main thing - you can not violate the requirements of GOST 50571.11.

. Exhaust fans at 12 VDC.

The above model is primarily attracted by the noise level. He is - do not believe his eyes - only 26.5 dB.Extremely quiet model, able to work quietly even at night. By law, for a dark time of day, a noise level of 30 dB is allowed, which is greater than the above figure. We believe that these characteristics are achieved due to the DC power supply. No harmonics and throws - no noise.

Secondarily, it draws performance - 95 cubic meters per hour. The characteristics indicated power 13 W at 2400 rpm. The authors were not too lazy to copy the data from the official corporate guide, where, despite the absurdity with the class of protection against electric shock, curious data are given. From the graph it can be seen that the capacity of 95 cubic meters is ensured only in the absence of medium resistance.

To check the provision of the required 50 cubes, it is easier to use an anemometer. The anemometer is a small case in the manner of a multimeter, in the upper part there is a round hole where there is a blade measuring the flow velocity. To conduct the experience, you need to slightly modify the design. The idea is as follows:

• Usually the door to the bathroom is closed. The fan has to overcome the resistance of all the cracks.
• We recommend that you open the door and put a funnel at the entrance to the exhaust fan diffuser. Make it out of plain paper so that the narrow part is accounted for by the diameter of the opening of the anemometer and the wide cover completely covers the diffuser( grate).Gap seals.
• Further is not difficult. You just need to turn on the fan, slightly open the door to the bathroom( slot 5-7 cm), measure it.

Anemometer usually shows speed. Often used to assess wind power at construction sites. For example, a tower crane is afraid of bad weather, if the situation is injected, it is necessary to fold the colossus. Most anemometers are made in China, do not be surprised if the measurement error is given, for example, for a range of 10 - 30 m / s. Just for the case of a tower crane. Everything below is simply displayed on the display, with no guarantee of accuracy.

It is possible to look through the manual, but we believe that infinitely low errors are not required. To improve accuracy, it is much easier to conduct a full-scale experiment: use a bathroom for its intended purpose with the exhaust fan on. If there are no complaints, the device is selected correctly. It is permissible to pre-test whether the exhaust fan is suitable. Usually stores do not mind to exchange the product without traces of operation. It is quite possible to find a ruler that is installed under the size and has a progressive power.

If there is not enough power in a single exhaust fan, it is better to replace it. Of course, you will need to discuss this possibility with the seller in advance.

Continue disassembling the Soler & Palau models. Add:

1. Low noise level is obtained not only through the use of an induction motor, but also by special shock absorbers. It is important to periodically disassemble the exhaust fan and lubricate it. The need for maintenance is determined by hearing: the noise of the movement of the blades begins to significantly annoy. The effect is eliminated if the exhaust fan is disassembled, the blades are cleaned, and oil is dropped on both sides of the rotor axis.
2. How to get power for a 12V fan. The product under discussion immediately comes with a transformer. A person who avoids such topics will have a question about the variability or constancy of the current. The transformer is usually connected with a galvanic isolation, its operation is impossible with constant voltage. At the same time information of the seller approves the said. Yes. The C12 / 14 transformer produces an alternating voltage of 50 Hz frequency. If you straighten it, the fan will not work. We clarify the fact, because it is permissible to purchase transformers( alternating current) and power supplies( direct current) under a DIN rail. The difference is huge, asynchronous motors are categorical to the kind of power. The current is foreseen alternating. In other cases, the motors are of a different type, using a current collector, which reduces the resource and increases the noise level.
   

   Fan with humidity sensor

3. Often fans are equipped with built-in humidity sensors. It is required that after the adoption of bath procedures the device worked until the climatic indices return to normal. In the case of the toilet, the focus will not work. Here the timer function is more useful, which the mentioned transformer is equipped with. Time is set to half an hour. This will help get rid of the smell in the most unfavorable scenario.
4. Please note, some models are equipped with non-return valves. This is beneficial when a strong reverse thrust is established. Then the pressure( pressure) decreases during operation, but the remaining time the channel will be tightly closed. Note that such a struggle to save electricity is simply ridiculous. A 13 W fan will press on the counter 0.3 kWh per day. Work for the month will cost 40 rubles. Another thing is a resource. Exhaust fan costs 2000 rubles and above. It makes sense to give the device a rest. Then you really need to take into account the return traction, or the frail neighbors who installed the hood more powerfully. Then, in the absence of a strong odor, it is better to take a fan with a valve.

Installation of exhaust fans

The diameter of exhaust fans is not the same. Some products are quite consistent with standard corrugations and air ducts. Information will be needed mainly for those who want to build a house with their own hands. Remember, the ventilation channel of the bathroom will certainly come out. It never uses a recuperator. This is due to the obvious reasons for the absence of a bad smell in other rooms.

If you take the old Soviet apartments, we usually encounter rectangular sections, which are not directly correlated with modern designs. Often it is necessary to use special grids, designed for hoods. The configuration of products varies, an example is shown in the photo - shows how to equip the ventilation shaft. In particular, in the absence of reverse thrust, it is permissible not to close the lower grid of round holes. This will ensure air flow due to natural thrust.

Much more often on sale are noticeable analogues of the lattice shown in the picture, where the hole for the air duct is round. Then the installation is simplified. Most overhead fans come with a rectangular grille and a round case. Special difficulties are not expected.

Now about the wiring! For a voltage of 12 V, it is laid in a channel separate from the other wires. If this fails to do so, a metal grounded shield is created( for example, a cable sheath) or a PND pipe is laid. Other things being equal, installing a fan in the toilet is easier than in a bathroom due to restrictions according to GOST 50571.11.The wire cross section is taken not less than 0.75 square millimeters of copper. This is not specifically mentioned, the recommendation is given on the installation of exhaust fans only for reasons of meeting the selected requirements of the IEP.