Installation of the fan in the hood of the bathroom

The bathroom fan is silent with a check valve: choice and installation


A standard bathroom or a common bathroom is a small space that is quickly filled with hot steam. Drops settled on the ceiling, walls, doors, furniture and towels. As a result, the service life of finishing materials is reduced, and the risk of mold and fungus, which pose a direct threat of health, increases repeatedly. And stale, wet air does not cause associations with comfort and comfort. Therefore, the installation of a fan is a mandatory measure to create an optimal microclimate.

Bathrooms in apartments are a room without a window, so fresh air enters only through a ventilation duct in the wall. Natural ventilation is provided by the design of the house, but its effectiveness largely depends on the air flow. Practice shows that such ventilation systems are ineffective and do not perform their function. This can be found out by applying a sheet of paper to the lattice in the wall hole. If the ventilation works, the sheet should be pressed to the grill by passing air. But, most likely, he will fall off.

The performance of the ventilation duct can be reduced due to clogging. The fact that it is urgent to install the fan in the bathroom signal several signs:

Fan installation is a necessary measure to create an optimal microclimate in the bathroom

The device of the ventilation canal

For private houses, the ventilation system is simply arranged: the channel in the form of pipes is displayed on the roof or is connected to the hood. If a house is made of wood, then even such ventilation is not required. After all, the walls are able to “breathe”, therefore they easily pass the air into the room.

For apartments, the situation is complicated by the fact that in the entrance everything is connected to a single ventilation channel. The lower the location of the apartment, the more likely it is that the channel will flash faster.

To check the quality of ventilation, you can bring the lit match to the ventilation hole. If the light does not move or moves very weakly, then ventilation works poorly.

When clogging the channel, it is necessary to ensure forced ventilation. Such artificial ventilation is provided by installation in the fan. It is embedded in the air exchange system (the hole of the ventilation shaft). When choosing a fan, it is necessary to take into account the factor that the device will be operated under high humidity conditions.

Forced ventilation in a residential building

Norms and requirements

In principle, the main requirement for the bathroom is the air exchange in it equal to 25 m³/hour. This is not depending on what size it is. And if in other office rooms (except toilet and kitchen), the frequency of the exchange of air mass is taken, then the standard value is required here. It is under it that they equip ventilation in the bathroom.

It is important to adhere to one strictly requirement. The volume of supply air should be as much or more than an iconic.

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.

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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.

How to Install a Through-the-Wall Exhaust Fan | Ask This Old House

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.

installation, hood, bathroom

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 of them 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:

Installation Video

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:

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.

All about the ventilation system in the bathroom and bathroom

Air routes system for natural circulation

In typical houses, the mine is adjacent to the bathroom. When repairing, you usually do not need assembly of long horizontal channels. It is enough to equip an exhaust hole in the wall with a decorative lattice or lay a short duct under the ceiling. To do this, use an aluminum or plastic corrugated rod hidden in a gypsum cardboard or a galvanized steel box. Such a box is finished with the same material as the ceiling; Built.In lamps, moldings or other decorative elements of the interior will help to design it beautifully.

If the height of the premises exceeds 250 cm, the suspended rack or stretch ceiling is usually mounted, into which the lattices connected to the shaft are built by means of sleeves.

Now a few words on how to organize an air flow into a bathroom. The easiest way is to file the doorbell so that there is a gap of about 20 mm under it. Another option is to cut a special overhead grill into the door: these products are small, elegant and, moreover, the sound is better cut off thanks to the visors above the holes. There are special noise.Absorbing devices with a buffer insert of porous material. The third option is to arrange a valve in the walls of the bathroom, equipping them with similar wall pepper valves.

Sometimes sealant doors with thresholds are installed in the bathroom, believing that for normal circulation it is sometimes enough to open them. This is inconvenient, moreover, in most houses, the hood in the wet zone also serves other rooms. Blocking access to it, you will worsen the microclimate in the entire apartment.

Forced ventilation in the bathroom and toilet

The main reasons for the problems with the hood are well known. These are the risers clogged and broken during the repair. It’s not so rare and ordinary construction marriage, when a bent deflector of an exhaust pipe is guilty of everything. And finally, there is a completely objective reason for unstable work. It is fluctuations in the difference in temperature of internal and outdoor air: in the heat it usually “pulls” poorly. For effective work, it is necessary that the common house mine has a large supply of throughput. Alas, most often this stock is missing.

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The main affordable means of combating this drawback is the installation of an electric fan. Exposite devices are quite diverse. The simplest of them have one operating mode and controlled by a switch (often it is combined with a light on the lights key). A higher level of comfort will provide automatic systems with a motion sensor or relative humidity.

A powerful fan can cause interruptions in the work of natural ventilation of the whole house: the stream discouraged by it will create an air cork in the mine, as a result of which the thrust will completely stop, or maybe overturning, and then the smells will begin to walk along the neighboring floors. And if the riser is blocked, the forced extract will not only worsen the living conditions throughout the house, but will also harm its structures: due to increased humidity, the risk of freezing walls will increase and corrosion of the reinforcement will accelerate.

A radical solution to the problem of poor circulation could be the withdrawal of an exhaust channel to the street through a ceiling box. However, when piercing the holes in the outer wall, there is a risk of touching the connections between the prefabricated elements of the building, so the issue must be coordinated by the housing inspection bodies.

The location of the ventilation ducts

As a rule, the installation of the fan does not require an additional system from the air ducts. The axial radial fan installed on the niche of the exhaust duct will cope with the ventilation. This method of its location and installation makes sense if the mine is located directly behind the wall of the bathroom, which can also be combined with the toilet. Many houses are equipped with passive ventilation, a hole in the bathroom wall leading to the toilet. From it the duct goes to the main ventilation duct. In this case, often in the toilet they do active ventilation (the fan is connected to the mains), and in the bathroom, passive.

installation, hood, bathroom

If the bathroom and toilet are divided, but have their own separate holes that go into the common shaft, then the best option would be to install the channel fan. It needs to be installed on the shaft segment, where air ducts are connected from two rooms.

When the ventilation duct is through one or more rooms, you will need to bring it directly into the room using plastic or corrugated aluminum ventilation boxes. Installation of the fan in all cases is carried out, as described below.

Extra fan fastening in the bathroom

The manufacturer, for fixing the exhaust fan on the wall of the bathroom, provides for fasteners located at the corners.

But this method has many disadvantages, here are the most significant of them:

All these shortcomings are deprived of the method of installing an exhaust fan in the bathroom on a silicone sealant

The technology for mounting an exhaust fan on silicone is as follows:

Silicone sealant is installed in a special gun, with which the contents of the tube are applied around the perimeter of the mounting ventilation hole, as shown in the image below.

After that, the exhaust fan is installed in the ventilation duct, is aligned in level and reliably pressed.

Then, for the greatest accuracy of the installation, we fix the fan on the wall of the bathroom using, for example, adhesive tape or sea tape, as shown in the image below.

As you can see, the installation method described here is as simple as possible and almost anyone can cope with this, I also advise you to read about a timer for an exhaust fan, why it is needed and how to install it. Here.

What is the ventilation system in the bathroom

The bathroom is more than other premises is subject to natural condensation and almost always has a high level of humidity in the absence of a normal ventilation system. As a result, unpleasant musty smells and water from condensate on the walls that contribute to the rapid development of fungi and mold begin to appear in this room.

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The correct ventilation system will help maintain tiles and other facing materials, wooden furniture, electrical appliances, as well as create the most comfortable conditions for staying in the bathroom of people.

There are currently two types of ventilation: natural (natural) and forced (artificial). If there is no opportunity to create normal natural ventilation (there are no windows or they do not open), then a forced ventilation system is used, which provides for the installation of certain types of fans intended for these household premises.

Forced fan in the bathroom

In its design, ventilation happens:

installation, hood, bathroom
  • Non.Kannaya. In this case, ventilation is produced in the bathroom through the holes in the wall of the common ventilations of multi.Storey buildings.
  • Channel. It is used to supply ventilation system to places that require the most intense and frequent air purification.

Also, in some cases, owners of apartments and private houses prefer to install a disconnecting forced system, even if there is a natural type of ventilation in the bathroom. Thus, you can be sure that a normal microclimate will always reign in this room.

This is due to the fact that in many old houses that were built more than 20 years ago, general ventilation systems are no longer able to cope with constantly growing loads, so you have to choose more modern methods of combating high humidity.

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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