Home Article How to install a fan in the toilet correctly

How to install a fan in the toilet correctly

How to make an hood in the bathroom and toilet with an exhaust fan

For the bathroom, increased dampness is characteristic. Condensate spots are formed on the ceiling, causing the appearance of mold and fungal foci. The hood for the bathroom plays a paramount role in preventing these aspects. Therefore, you need to treat the air exchange in the bathroom with all responsibility, and hence the corresponding choice of the fan for the hood. The article below will talk about the optimal selection of hoods, its types, as well as recommendations for the installation of ventilating devices.

This device looks like a small device, which by means of blades on the shaft drives air through the pipes of the ventilation system. over, it does not affect the natural hood into the bathroom, provided that the check valve is installed in the supply pipe.


The extract a product will be in demand in places of accumulation of damp, smoke or specific smell. Since adverse aspects lead to decay and formation of the fungus or the occurrence of dark spots on the walls and ceiling. And for the timely solution to these problems, it is necessary to restore air purity to a state according to sanitary standards. It is in these situations that the ventilation device allows you to solve the problem.

Features of the system

There are no serious features of the ventilation system in the bathroom and toilet. As already mentioned, this is a direct riser from the rooms through the roof outside. often they are combined into one riser, and a horizontal canal with an output to the wall is introduced into the premises. The fan is installed in it.

If the ventilation of the bathroom in a private house is connected to the kitchen exhaust channel, then it is better to use exhaust technology. This is when the fan is not installed on each channel inside each room, but one for the entire riser, to which all the highways are connected.

install, toilet, correctly

Types of ventilation systems

Professionals advise using two varieties of ventilation systems:

The difference between these systems is obviously based on their names. in the first design there is a ventilation duct, in the second. the air flow is provided without such.

When working with bathrooms or bathrooms, it is advisable to exclude the creation of individual channels. It is customary to create an opening in the wall and remove the worked out air into the common ventilation branch of the building. This procedure is not only more convenient and less costly, but also more rational. Of course, this is applicable in multi.storey urban buildings. But, if we are talking about a private house, then the ventilation must be designed at the stages of construction, in the process of building walls.

The flow of air into the bathroom and the toilet is implemented, as a rule, through one channel. in the bathroom, after which an additional intermediate opening is created in the wall between the bathroom and the toilet for the transition of the spent air.

Exhaust fan designed to use ventilation in the bath through the toilet, can have a variety of appearance and size. But the most important is the power of the fan. It is obliged to match the current in the wiring.

Fans have the following design differences:

  • The axial model moves the air parallel to the axis of the device. This is carried out thanks to special shoulder blades. These systems are developed exclusively for non.canning structures;
  • Diametrical models with fairly low performance have special drum wheels in their design;
  • The centrifugal type device, which has a spiral case, guarantees extremely high performance, however, during operation the system creates a fairly large noise;
  • combined, centrifugal-axial device more silently works with the same efficiency as a simple centrifugal system.

Calculation of the fan and toilet fan performance

To decide which fan put on a bath with a toilet, you need to calculate the necessary air exchange. Calculation is a whole system, but when installing the fan is the main attention is paid to its characteristics: it provides the required air speed. In order not to get into the calculations, its performance is taken by the average nomsomes.

Air exchange rate for different rooms. With their help, ventilation is calculated in the bathroom and toilet

As you can see from the table (this from SNiP) for the bathroom for an hour should “pump” at least 25 m³/h, for the toilet or combined bathroom, the speed should be twice as much. 50 m³/h/h. These are minimal values. In fact, through three (or two) technical premises. a kitchen, a toilet, a bathroom. should go as much air as enters through supply ventilation.

install, toilet, correctly

The calculation of the influx is carried out by the volume of all residential premises and usually exceeds it by 1.5-2 times and to ensure the required air exchange of the minimum values ​​specified in the table is not enough. Therefore, fan performance is taken, at least with a two.time margin, and for kitchens even more: there will be no unpleasant odors in the apartment, as well as dampness and fungi. Therefore, going behind the fan to the bathroom with less performance than 100 m³/h is better not to take.

How to calculate the consumption of a bore of the bathroom for a bathroom

Touched on issues of minimum cross.section of cores on copper and flexibility class that affect the price. The more flexion the cable is, the more expensive the thicker there is, the more you have to pay. Select a toilet fan so as not to overpay, it is recommended, focusing on performance. Conditions differ in people.

Some people, without hesitation, put powerful exhaust fans, pumping their own smells to neighbors. There are consumers choosing too weak a model, after installation, the product does not cope with duties. Start choosing an exhaust fan with a simple one: try to understand if the reverse craving is present. For residents of the lower floors, this is irrelevant, with an increase in height, the need for a powerful exhaust fan increases. Check the presence of reverse traction will help A4 paper sheet. It is necessary to cover the ventilation hole with paper, if there is no sticking, the thrust is unsatisfactory. The power of the device is chosen more.

You will need an anemometer. Aliexpress costs 800. The flow rate is determined, then, based on the area of ​​the transverse cut, the air consumption is calculated. The speed of movement along the walls is lower than in the center. According to the ABOK standard-1, the exhaust fan air consumption is:

  • For a bath or toilet room. 25 cubic meters per hour.
  • For a combined bathroom. 50 cubic meters per hour (if it is not used, the frequency of air exchange is 0.5 1/h, it turns out. once in two hours).
  • For a hotel room for a bathroom:
  • The room is used. 120 cubic meters per hour.
  • The room is not used. 20 cubic meters per hour.
  • For a public toilet at least 75 cubic meters per hour per person.

Bathroom equipped with a fan

We strive to achieve these indicators. First, we examine the ventilation system with an anemometer for ensuring parameters. The flow rate of the cross.section is heterogeneous. The average speed is in the form of an integral in a section with division by the size of the area. Available to simplify.

Divide (using a ruler) transverse cut into equivalent areas, we measure in each. We try to averaged for the segment (purely visually, according to the indications of anemometer). Then the arithmetic mean of all speeds is calculated. The result will be close, the quality depends on the ability to measure. During the experience, you do not need to overlap part of the section with your hand. It is ideal to hold the anemometer on the steel bar, the body of the device makes an error.

Well, if you can get a remote anemometer. He has a measuring blade on a steel pipe, cord or flexible corrugation. In each case, see that the device minimally overlaps the cross section of the ventilation passage. At home, this is realized. The situation is much easier when the choice of a fan for the toilet has already been made. There is a lattice here, to which we put an anemometer without loss, without blocking the section, we will measure.

It is difficult to calculate the area if the protective grill of a difficult configuration. It is recommended instead of numerical ways to use field. To do this, on paper, a drawing of any color of the protective grate is performed. The free part is cut out and folded. If necessary, each piece is divided into parts. The task is to get a rectangle, by changing the sides of which, we get the desired area. Now it remains to multiply it by the speed issued by the anemometer to obtain the result.

The found number is compared with the standard. If the value is insufficient, a powerful exhaust fan is required. Depending on the data obtained, the issue of the need for constant or temporary operation of the device is resolved. Even whether it is required to put an exhaust fan! After using the bathroom, the metabolic intensity is supposed to increase. Adjust the speed of rotation of the exhaust fan.

How to connect a fan in the bathroom to the switch. 3 errors and connection circuits.

Connection of the hood fan in the bathroom can be performed in several ways.

But the most correct thing is to do this through the light switch installed on the lighting in the bathroom, or through a separate keyword key.

The first options have a lot of inconvenience, at first not entirely noticeable.

For example, you mounted the hood on the door opening sensor. At the same time, it turns off the timer after 5 minutes. It would seem very convenient.

However, it is quite problematic to install such a sensor on the interior door. Not to mention other moments of operation. For example, what to do if you stayed in the toilet longer than the time spoke.

Open and close the door again? And if guests are in the kitchen?

In addition, the cable will have to lead under the tile, drill several extra holes, etc.P. Simple motion sensors are capricious to humidity and very quickly fail.

We will have to select expensive models with appropriate protection for IP humidity, according to the zones in the bathroom.

Someone considers the most convenient option to install the switch on the hood directly inside the bathroom. However, PUE prohibits it to do it.

Why is this so, relevant links and explanations of Rostekhnadzor specialists will be given at the end of the article.

Therefore, consider the most correct and reliable way. Connection from the lighting switch located on the outer side of the bathroom.

For installation, you will need very few materials:

Which one is better to choose, read in the article “The best cable for nym or vvang-ls”.

The body of most hoods is plastic, so such models do not need to be grounded. If you have ventilation with metal elements, then 41.5 mm2 2 residential cable will already be required here

The loads here are small, so these are controversial for many terminals, it will be quite appropriate here. No twists with subsequent welding, soldering or crimping do not need.

In our market, the most popular model Era is. We will consider it in more detail.

Other mechanisms and models with a timer from Vents, Ballu, Electrolux are connected in a similar way.

Here are the technical characteristics and detailed data on all popular models:

Electrolux EAFM-100TH ERA SB D100 Optima Vents 100 K Domovent 100 C Era D 100SC Ballu Green Energy Era D 100c et Vents 100 Quiet

Such fans with the timer have two operating modes:

How to install toilet exhaust fan for your BTO flat, 190 all in!

Switching modes is carried out on the control board in the upper right corner.

There are similar jumpers from other manufacturers.

When working in the “toilet” mode, after turning on the light and feeding on the board, ventilation immediately begins to work. As soon as the light is turned off, the fan does not stop, but a certain time will continue to spin.

This time you set yourself, twisting the adjusting screw with a screwdriver.

How To Install A Bath Exhaust Fan | DIY

Expitable fans at 12 in direct current

In the mentioned model, primarily attracts noise level. He makes it. we do not believe the eyes. only 26.5 dB. An extremely quiet model that can work calmly even at night. According to the law for the dark, noise level of 30 dB is allowed, which is more than the named number. We believe that these characteristics are achieved thanks to the power supply. No harmonic and shots. no noise.

Secondly, attracts performance. 95 cubic meters per hour. The characteristics indicate a capacity of 13 watts at 2400 revolutions per minute. The authors were not too lazy to copy the data from the official corporate party, where, despite the non.Urazitsa with the class of protection against electric shock, curious data are given. From the graph it can be seen that the performance of 95 cubic meters is ensured only in the absence of environmental resistance.

To check the required 50 cubic meters, it is easier to use the anemometer. The anemometer is a small case in the manner of a multimeter, in the upper part a round hole, where there is a blade that measures the flow rate. To conduct experience, you will need to slightly finalize 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 the door open, and at the entrance to the diffuser of the exhaust fan put a funnel. Make out of simple paper so that the narrow part falls on the diameter of the hole of the anemometer, and the wide cover is completely covered with a diffuser (grille). Shortion cracks.
  • Further will not be difficult. You just need to turn on the fan, the door to the bathroom is slightly open (5-7 cm slit), measured.

Usually the anemometer shows speed. Often used to evaluate wind strength at construction sites. Suppose a tower crane is afraid of bad weather, if the situation is pumped out, it is supposed to be folded by the colossus. Most anemometers are produced in China, do not be surprised if the measurement error is given, for example, for a range of 10. 30 m/s. Exactly in case of tower crane. Everything below is simply displayed on the display, without a guarantee of accuracy.

It is possible to flip out the leadership, but we believe that infinitely low errors are not required. To increase accuracy, it is much easier to conduct a full.scale experiment: use the bathroom as intended with the pulled fan on. If there are no complaints, the device is selected correctly. It is permissible to try in advance whether the exhaust fan is suitable. Typically, stores do not mind exchanging the product without traces of operation. It is possible to find a line set to size and has progressive power.

If there is not enough strength for a single exhaust fan, it is better to replace it. Of course, the seller will need to discuss this opportunity in advance.

We continue to disassemble the models of Solerpalau. Add:

  • The low noise level was obtained not only thanks to the use of an asynchronous engine, but to special shock absorbers. It is important to disassemble and lubricate the periodically exhaust fan. The need for maintenance is determined by ear: the noise of movement of the blades begins to tangibly irritate. The effect is eliminated if you disassemble the exhaust fan, clean the blades, drip oil on the axis on both sides.
  • How to get a fan for 12 in. The product under discussion immediately goes with a transformer. A person guarding such topics will have a question about the variability or constancy of current. The transformer is usually associated with galvanic denouement, its work is impossible with constant tension. At the same time, the seller’s information approves the mentioned. Yes. Transformer C12/14 produces alternating voltage with a frequency of 50 Hz. If you straighten it, the fan will not work. We clarify the fact, because it is permissible to purchase transformers (alternating current) and power supply (direct current) under the DIN-rack. The difference is huge, asynchronous engines are categorical to the power of power. The current is foreseen. In other cases, engines are used by a different type, using the current collector, which reduces the resource and increases the noise level.

Tips from professionals

If a person has never encountered the installation and maintenance of ventilation systems, he definitely needs to familiarize himself with the following recommendations:

First of all, you need to do everything possible so that the room has a sufficient influx of fresh air. Otherwise, even the most powerful fan will not save. Expensive equipment is not always the key to effective air exchange. The competent placement of the fan and the air duct system is much more important. If everything is calculated correctly, you can do with cheap devices enough. The presence of an air conditioner, ionizer, cleaner or moisturizer is not a reason for the questions whether ventilation is needed in the toilet

It is important to understand that all of the listed devices cannot provide an influx of fresh air. To increase the service life, the installed equipment must undergo regular preventive maintenance. For example, the fan blades during operation are gradually clogged with dust, soot and fat

install, toilet, correctly

As a result, the effectiveness of the system is significantly reduced, and it is no longer able to issue a maximum of its potential. In some cases, plentiful pollution of the blades provoke sings of the motor. Therefore, they must be periodically cleaned (once every 3-5 years). The exact terms depend on the operating conditions and the degree of load on the device. Preventive measures also provide for inspection and cleaning of ventilation ducts. If there are no problems with plastic ducts laid by the tenants themselves (they can always be disassembled), then with house mines everything is much more complicated. First of all, this applies to old houses, where in decades of operation, many different garbage and dirt accumulate inside the ducts. On your own, it will not work to cope with such a task, t.to. This requires special equipment. There are special services for this. When using the supply system, it is important to take care of reliable wiring for the fan. The fact is that inside the bathroom there is always increased humidity. Therefore, for laying power, it is necessary to choose a moisture.resistant cable, placing it in a special box. It is most convenient to do this if the room uses a suspended ceiling system.

The cost of installing ventilation systems

for installation of ventilation, for installing ventilation grilles and in the estimate on the channel fan are usually used on the basis of the construction part of the FER and the GESS. The aforementioned code has number 20 in both codes. In the next text, we will consider in more detail the use of for the installation of ventilation grilles, for dismantling ventilation grilles, for installing fans and some other types of for ventilation work.

As mentioned above, the for ventilation are included in the set of the 20 construction part of the collections of the FER or the GESN. Therefore, the majority of for the installation of ventilation should be sought in this set. Figure 1 shows the composition of the FER 20 batch for ventilation work.

As can be seen from the schedule of in Figure 1, the price in the estimate for the installation of the canal fan and the rates for the roof fan can be selected from tables in section 2 called “fans”. In general, in this section there are only 4 types of tables for installing various types of fans.

In addition to installing fans, the volume of work in the Fer20-03-001 table also includes alignment and testing of the installed fans. The volume of work in all Fer20-03-001 is measured in units.

The standards given in the Fer20-03-003 table, as can be seen from Figure 2, can be used as a price in the estimate on the roof fan. Figure 2 also shows the composition of work according to one of the standards. It should be noted that the algorithm of work for each of the norms is identical. The difference, as in previous tables, lies in the weight of the installed equipment. Please note that the Fer20-03-003 table contains four norms, each of which can be used depending on the weight of the installed equipment in the estimate of expenses in form 4, local estimates, the CS: GO-2 or another form of cost estimates. The volume of work is also measured in units.

The rate in the estimate of the fan can also be Fer20-03-004-01 for installing a dust quilting. The work includes the installation of equipment and its test, and the unit of measurement is the same as in other standards of section 03 of the collection 20.



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