How to connect the hood to the light bulb. How to connect a bathroom fan to a switch with your own hands

Installing a fan in the bathroom is necessary if the natural ventilation system does not cope with its task. A sign of non-working ventilation is constant dampness, condensation and misted mirrors in the bathroom. If the bathroom is combined with a bathroom, then an unpleasant odor and various microbes in the form of fungus and mold may appear, which have a negative effect on human health and life. Mold and fungus reduce the life of washing machines, showers, destroy tile joints on the walls.

Checking the ventilation ducts

If your bathroom has such problems, then you need to check the performance of the ventilation ducts. This is done quite simply: you need to bring a burning match to the grate of the hood. If the fire stretches towards the grate or dies out, then the ventilation ducts are fully operational and normally cope with the ventilation of the bathroom. It makes no sense to install and connect additional ventilation.

If the match continues to burn and the flame does not react to the exhaust grill, then it is necessary to clean the ventilation ducts and install a fan. Today, there are many different types of fans on the market of electrical devices, which differ in the principle of operation, design and functionality. For domestic conditions, an axial fan is usually installed in the bathroom.

After selecting the appropriate fan, you can proceed to install it. All recommendations and installation tips are suitable for the bathroom, toilet, as well as for the kitchen.

Installation Requirements

The installation of a fan in the bathroom must be carried out subject to certain conditions in order for the fan to perform its tasks efficiently:

A properly functioning ventilation duct is required. If the channel is clogged, the hood will not give the desired effect, therefore, in this case, cleaning the channel is indispensable.
When extracting moist air from the bathroom, it must be replaced by a new portion. Therefore, it is necessary to have a small gap under the entrance door to the bathroom to ensure normal air ventilation.
Bathroom ventilation will work efficiently if the right choice of fan is made, taking into account quality, functionality, noise parameters and performance.

Preparing for installation

Installing a fan in a bathroom does not cause much difficulty. It is better to choose a waterproof version of the fan, with a built-in humidity sensor that will control the air humidity parameter. Such an extract will automatically start when the humidity exceeds the set limit.

When installing the fan yourself, you will need to perform the following work:

Lay the cable.
Prepare a place for installation, expand the ventilation channel if its dimensions do not correspond to the purchased equipment.
Connect the fan to the electrical network.
Install the fan assembly into the ventilation duct.
Filling voids with mounting foam.
Putty.

You can do this work on your own.

To increase the efficiency of ventilation, it is necessary that air enters from one side of the bathroom, and air must exit from the opposite side. If the distance between the air inlet and outlet is too small, the ventilation efficiency will be significantly reduced. It is better if a grate is installed at the bottom of the bathroom door.

Site preparation for installation

The most convenient place to install a fan in the bathroom is the outlet vent leading to the exhaust shaft of the house. Such holes exist in almost all apartments for the functioning of natural ventilation. A standard type ventilation duct can provide the passage of air blown by a fan with a capacity of not more than 100 cubic meters per hour.

The fan is installed in the opening of the ventilation channel. Therefore, the hood must be selected taking into account the size of the channel for the normal installation of equipment. The diameter of this hole is of standard size: from 100 to 150 mm.

If you chose the wrong diameter of the fan, and there is no longer an opportunity to exchange it for another, then this can be corrected by enlarging the hole with a puncher. Otherwise, if the opening is too large for the given fan size, a plastic pipe insert can be selected and inserted into the vent. Around the inserted pipe, it is necessary to seal the voids with mounting foam, wait for it to dry, cut off the excess foam with a knife, and putty the remaining irregularities.

If the volume of the bathroom is large, which is often the case in spacious apartments, then it is advisable to purchase a more powerful fan. In this case, to install such a device, you will probably have to use a puncher and punch another ventilation channel in the wall. It is better to entrust such work to professional workers.

Wiring diagram options

First of all, the power cable must be connected to the place where the fan is supposed to be installed. This is usually done during repair work, the cable is laid into the wall. You can lay the cable on the wall surface with its laying in the cable channel. Then the cable is connected to the outlet, and the fan power plug is inserted into the outlet.

The convenience of a fan in use depends on its functional and technical capabilities, and on the way it is turned on. When choosing a connection scheme, you need to carefully consider how the entire system will work. Alteration of an incorrectly chosen scheme will cause a lot of trouble and trouble.

Turning on ventilation with a cord

There are many ways to connect fans to power. Some versions are equipped with a switch located on the housing. Usually turning the ventilation off and on is done with a cord that needs to be pulled.

Such control is not always convenient, as fans can be located high under the ceiling or in hard-to-reach places above the toilet or bath. If the repair of the room is not completed, then you can find a convenient place for the cord, and lay the cable in the right place.

Switching on with a light bulb

The cheapest installation of a fan is to connect it in parallel with a lighting lamp. In this case, the fan will work simultaneously with the lamp. When the light is turned off, the ventilation will turn off.

advantage such circuit is low cost and easy connection. To lack you can attribute the operation of the fan even when there is no need for this. Conversely, insufficient ventilation when necessary. Therefore, with such a scheme, you have to turn on the light in the bathroom in order to further ventilate it. This operating procedure reduces the life of the electric fan motor, since switching on and off occurs much more often, which negatively affects the mechanical and electrical parts of the motor.

Operation from a separate switch

In order for the hood to work only at the necessary moments, there is a connection diagram through a separate switch, which is located on the ventilation grill or on the wall. This is a more expensive version of the circuit, since a longer cable is required, and some complication of the circuit.

In this case, the connection will not be combined with lighting. It is necessary to assemble a circuit similar to the lighting circuit, with the difference that a fan will be connected instead of a lamp.

It is better to connect the fan with a separate cable through a two-key one. The fan motor will only run when needed, regardless of lighting operation. The disadvantage of such a scheme is that you can forget about the included hood, and it will work unnecessarily, consuming electricity.

Automatic system

Modern devices often began to be equipped with and. In complexity, this scheme is similar to the scheme for working with a switch. The electric motor is connected using three wires: two of them are power, and the third goes to the signal lamp. The work consists in turning on the fan together with the lighting, and turning it off after a certain time after the lighting is turned off. This time is sufficient for normal ventilation of the room.

The distribution network also presents fans with reverse operation. The motor will not run while the light is on and will start after the light has been turned off for the time set on the timer.

The order of connection and installation of the fan:

Remove the front grille. This will make the connection terminals available.
Connect the wires to the fan using the terminal block. In this case, it is necessary to observe the marking of wires by color. The blue wire is zero, the phase is usually red, white or black.
Insert the fan into the ventilation hole.
Attach the fan housing to the wall vent using the supplied wall plugs or glue or building sealant.
Install a mosquito net on the fan in front of the cover so that insects do not enter the bathroom.

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As a rule, natural ventilation in old houses does not stand up to scrutiny. It cannot maintain the desired level of humidity, does not guarantee the absence of unpleasant odors, and cannot properly circulate the air. In such conditions, the most rational solution is to install exhaust fans.

There are several types of such devices, which differ in the design of the working bodies and small additional devices. A common type of appliance is an exhaust fan with a timer. The built-in timer allows you to turn on the device at the same time as turning on the lighting in the bathroom and turn it off after a certain time after turning it off. Thanks to this, there is no need to monitor the hood, optimal conditions inside the room will be maintained automatically.

Main features of fans with timer

The fan should be connected to a separate junction box or lead directly to the junction box.

To connect, you will need to lay additional wires leading to a fan with a timer from a lighting control switch.

The timer needs only once to be set to the appropriate operating mode, and it will work in this mode all the time, without requiring further adjustment of the parameters.

The timer itself is a simple device and it does not significantly increase the cost of the entire device.

The principle diagram of the fan operation is as follows: a person, entering the room where the device is installed, turns on the lighting, with which the fan itself turns on. When leaving the room, the light turns off, but the fan continues to operate and it operates for exactly the same time as was specified when setting the timer.

In order to connect the fan, you need to bring 3 wires to the device: a constant phase of the main power supply, this phase will not be interrupted by any switches, except for the circuit breaker in the electrical panel; control phase wire that comes from the switch; null conductor.

With this connection method, the fan is turned on when the second phase wire is closed, at the same time the lighting will turn on. When turned off, the phase from the second wire disappears and the light turns off, but the fan continues to work due to the presence of the first permanent phase wire, which remains connected until it is opened by the triggered timer.

The bathroom is by definition a temple of purity and freshness. But this is not always the case if there is poor ventilation or no ventilation at all. Then, from a temple of purity, the room turns into a hotbed of mold, fungi and insects that feel comfortable in a humid atmosphere and dampness, and this carries a potential threat to the inhabitants of the apartment. In this article, we will tell you how to connect a fan in the bathroom with your own hands, providing possible connection diagrams, as well as installation tips.

Checking natural ventilation

First of all, you need to find a stuffing box - a ventilation shaft and examine it for the absence of obstacles to the outflow of air. Also, before connecting a household fan, it is recommended to clean the ventilation, remove cobwebs, debris and dust accumulated there.

Using a lit candle, we check the presence of air flow, the flame should deviate towards the mine when it is brought to the vent. To find out if there is sufficient ventilation without special devices, you can attach a sheet of paper to the air vent and release it. If it continues to hang, airflow is present. Fell, so the flow is very weak or absent. The verification method is provided in the photo below:

If there is no natural ventilation, you must contact a special service or housing office. If there is, but it is not enough, it makes sense to install an additional fan in the air duct. To date, the market offers a huge range of all kinds of fans for every taste and color, which differ fundamentally and in appearance. For domestic operating conditions, an axial cooler is most often installed.

Having decided on the size and manufacturer, we will proceed to install the fan with our own hands. We immediately draw your attention to the fact that this instruction is suitable for installation in the bathroom and toilet, as well as for the kitchen, where a small cooler is often used instead of a hood.

Choosing a connection scheme

First of all, you need to supply power to the future unit. This is best done at the repair stage by hiding the cable in the wall. Otherwise, the conductor will have to be hidden in a decorative box, and then connected to the outlet through the plug.

There are several schemes for connecting a fan in a bathroom to a 220 volt network:

parallel to lighting;
a separate switch;
through a timer or sensor.

From a light bulb

The most budget option is to connect to the lamp. In this case, the cooler turns on simultaneously with the light, and works as long as the light is on.

A huge plus of such a connection scheme is ease of execution and relative cheapness, but there is a drawback, this is the operation of the fan when it is not required, during water procedures a draft is created, insufficient airing time of the room, as a result of which it is necessary to leave lighting for additional time. In addition, this mode of operation reduces the life of the engine, since starting the engine is accompanied by wear on the electrical and mechanical parts. And frequent switching on and off reduces it.

From the switch

To eliminate the stupid operation of the hood, you need to connect the fan through a separate switch, which can be located both on the hood grate itself, and in the form of a separate key on the wall. This fan connection option is more expensive than the previous one, since the cable length increases and the circuit becomes more complicated. In addition, the connection does not need to be made from the lamp, it is enough to make the same circuit as for lighting, only there will be a hood instead of a light bulb.

Connecting the fan with a separate line through a two-gang switch is better from the operational side, because. the hood motor works only when needed, while the bathroom light can be turned off, you can independently adjust the operating time of the hood. The disadvantage is that there is a chance to forget about the cooler and it will work for an unreasonably long time.

Through automation

Recently, in the struggle for a buyer, manufacturers began to supply their devices with automation elements - timers and humidity sensors. A very good solution, it seems to us, is a hood with a timer. The installation scheme is comparable in complexity with the scheme for connecting a fan through a switch.

You need to connect the device through three wires, two power supply 220 volts, and the third signal wire, from a lighting lamp. The algorithm of work is reduced to switching on together with lighting, and switching off after a specified time (3-30 minutes) after turning off the light. This time should be enough for the flow ventilation of the bathroom.

Also on the market there are models with a reverse mode. The motor will not turn on while the light is on, and starts to work after the light is turned off, for the time set by the timer.

We make installation

Manufacturers have taken care of the ease of connection and installation of the fan in the bathroom. Having removed the front grille, the fastening and switching elements are revealed to us. You can connect the fan to the 220 V network through the terminal block. When connecting, be sure to observe. Zero is always blue, and phase is usually white, red, or black.

As you can see, connecting the wires is quite simple and it is difficult to confuse something. You can install a fan in a bathroom or toilet both on the dowels that come with the kit, and on construction sealant or glue, if it is not possible to drill holes in ceramic tiles.

You can learn more about how to install a fan in the bathroom with your own hands by watching the video that we have provided below:

Tile wall mounting

Mounting the housing on a slatted suspended ceiling

We hope you enjoyed our article and learned everything you need to install a fan in your bathroom with your own hands!

Everyone knows that in the bathroom there is always high humidity, for this reason fungus, mold on the walls and other unpleasant factors form. That is why every family needs a bathroom.

Installing a fan in the bathroom is not as difficult as it might seem at first glance. You don't have to be a jack-of-all-trades to install it correctly, but there are a few important things you need to know. Installing the device will not take much time. It is desirable, of course, to install the fan during the repair, but there are cases when the existing means of ventilation do not cope with the task. This can be easily identified by fogged up mirrors in the bathroom, or when bathing becomes difficult to breathe.

Do not be afraid that a simple installation can ruin a repair that has just been made. When installing ventilation, it is not necessary to make repairs again, just a little lubrication with plaster or putty is enough, and nothing will be noticeable. In cases where the existing ventilation does not cope with its function, it is necessary to install additional ventilation devices.

Tools and materials needed to install a bathroom fan

The first thing you need is the device itself (fan). You need to choose it by prematurely measuring the width and length, and the depth of the opening prepared for installing the device.
Hammer drill or drill - needed in order to drill holes.
Dowels with a diameter of approximately 3 mm. But it also depends on the design of the fan itself.
In order to connect the device to the electrical wiring, it is also necessary to purchase wires and cable channels.
Putty - is needed in order to cover again the places where the plaster will fly off when installing ventilation.
Sealant.
Decorative lattice.

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Types and systems of ventilation

It is very important that in rooms with high humidity there is good ventilation, in particular, human health depends on this. It is for this reason that certain requirements are imposed on ventilation in the bathroom, which are indicated in SNIPs.

There are a lot of types of ventilation, but not always existing ventilation copes with its immediate task.
According to air exchange, ventilation is divided into two main types:

Natural - fresh air comes from the windows and doors in the bathroom.
Artificial, otherwise called forced, works due to the installation of ventilation devices.

According to the purpose, ventilation is divided into 3 types:

Exhaust - air exchange occurs due to the exit of air from the room through the shaft.
Supply - air exchange occurs through the ventilation duct.
Mixed - in this case, two principles work, the exit of old air through the mine and ventilation.

In cases where you need to change the old hood to a new one, you just need to unscrew the screws from the old ventilation means with a screwdriver and screw the fan you have chosen in advance in the same place. But when it is necessary to apply forced ventilation, it is necessary to create an additional hood with a perforator, which will be connected to the ventilation duct. In order to connect the device in the bathroom, you can use the light switch or the lamp in the bathroom. In this case, ventilation will work when the bathroom is lit. There are cases when it is not always necessary for the fan to work when the light is on, then you just need to purchase an additional switch. An additional hood will get rid of the unpleasant odor.

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Types of exhaust fans for the bathroom

There are several types of bathroom fans. All of them are different in functionality and design, so everyone chooses what he needs:

Axial - are considered one of the most popular, because it is very simple. They must be installed directly into the wall: into the openings of the ventilation shaft. In comparison with other devices, they have a fairly high efficiency - more than 100 cubic meters per hour. There is a small drawback: axial fans are very noisy, their noise reaches up to 30-35 dB.
Radial - when the master must certainly work, since it will be very difficult for him without special knowledge and experience. Radial fans save energy - 20%. They are considered silent.
Centrifugal - despite their power, these fans are silent. They are mainly used when the room is larger than 15 m². Centrifugal fans appeared in the 70s, but almost immediately became known to the whole world due to their ease of use. Most often, such fans are installed under the ceiling, then hidden under drywall. Installation of such fans does not take much time.
Roof - installation of these fans is carried out by special craftsmen. Ventilation of this type is installed on the roof of residential premises. This is the best choice for those who are afraid to spoil the repair they just made. The advantages of this device is that it does not take up space in the room and does not bother with noise.

The choice of ventilation can be approached not only from the side of functional features, but also from the design side. Having made an unusual renovation in the bathroom and choosing a stylish and modern fan, you will contribute to the fact that the bathroom will be transformed even more.

Good day dear blog readers. The topic of the post is how to connect the fan in the bathroom to the switch and we will try to do it ourselves.

The bathroom is considered a high-risk room, according to building documentation. High humidity is also dampness, odors, mold, so good ventilation is a must.

bathroom fan

According to regulatory data, the value of air exchange should be 25 cubic meters. m / h, so when choosing a fan, consider this requirement. The fan still has an indicator, which is also regulated by the norms, this is the noise effect of operation.

During the daytime, the fan noise should be within 23 - 58 dB, at night within 13 - 50 dB. It is better to buy a fan in advance in order to know what diameter to make a landing hole when laying tiles.

At the moment, fans are available with a humidity sensor, timer, photo timer, motion sensor, etc. Before buying, you will need to decide what you would like to purchase. Let's take a closer look at connecting the most common options.

During installation work, connections and connections, make sure that there is no voltage in the wires using.

Wiring diagram for a fan with a timer

In this option, the fan and bathroom lighting are turned on at the same time. When the lamp is turned off, the fan is switched off for a certain time.

Connecting a fan with a timer

Let us consider in more detail the connection and connection of wires in this diagram. We lay a three-core power cable in the junction box, the cores of which have a certain color of insulation.

A wire in brown insulation will be phase, blue zero and yellow ground. We will lay the next three-core cable from the lamp to.

We will run a two-core cable from the switch to the box. A three-core cable and an additional fourth core will have to be run to the fan from the box.

Now let's connect the wires and connect them. We cut all the cables in the box from the outer sheath and clean each wire from the insulation by six centimeters.

We take the blue neutral wire of the power cable, the blue wire from the lamp and the blue one going to the zero contact of the fan (N), twisted together.

Then we take the brown wire of the power cable, the brown wire coming from the contact L fan and the brown wire going to the switch, twist together.

Now we take the brown wire coming from the lamp, the blue wire coming from the switch and the brown wire from the contact A fan, twist together.

We solder or crimp the twisted ends, isolate them, put them in a box and close it. We turn on the power supply and check our work.

Wiring diagram for a fan with a lamp

If you don't need fan bells and whistles, you can buy a simple fan and connect it in parallel with the lamp.

If repairs are not expected, then you need to run a three-core cable from the bathroom lamp to the installed fan and connect the blue wire to the contact N fan and neutral wire going to the lamp.

We connect the yellow wire to the grounding contact of the fan, the other end of the wire to the grounding of the lamp. Connect the brown wire to the contact L fan, the other end of the wire to the phase wire of the lamp.

If you are in the process of repairing, then it is better to bring all the wires to the junction box and make a connection in it. In our case, the three-core cable has three colors, blue, yellow and brown, and the two-core blue and brown.

The box comes with a three-wire supply cable, three-wire from the lamp, three-wire from the fan and two-wire from the switch.

Fan connection diagram

We cut all the cables, we clean all the wires by six centimeters. Next, we take the blue (zero) wire of the power cable, the blue wire from the lamp, the blue wire from the fan and twist it together.

Now we take the brown (phase) wire of the power cable and the brown wire of the cable coming from the switch, twist it together.

Then we take the brown wire from the fan, brown from the lamp and blue from the switch, twist it together.

For all twists, we bite off uneven ends with side cutters, solder the twists or crimp them, isolate them, put them in a box and close it.

We connect a switch, a lamp, a fan to the wires, apply power and check the operation of the circuit.

Scheme of connecting a fan to a two-gang switch

This is another common option for connecting a fan, when the light in the bathroom is turned on separately, and the fan is turned on separately.

In this option, a junction box is installed, into which three-wire cables are brought from the lamp, double switch, fan and power panel or adjacent box.

Connecting a fan to a two-gang switch

We connect the wires in the box. We cut all the cables, we clean the wires. We take the stripped blue (zero) wire from the power cable, blue from the lamp, blue from the fan and twist it together.

Then we take the brown (phase) wire of the power cable, the brown wire from the cable coming from the switch, and twist it.

Now we take the brown wire from the cable coming from the fan, the green wire from the cable coming from the switch, and twist it together.

We take the brown wire from the cable coming from the lamp, the blue wire from the cable coming from the switch, and twist it. We connect the switch, lamp, fan according to the electrical diagram.

We bite off the uneven and sharp ends of the twists with side cutters, or we crimp the twists, isolate them, put them in a box, close it, turn on the power supply and check the operation of this circuit, in which each key will turn on the lamp and the fan separately.

Here are all the wisdom of connecting, I think everyone can handle it. Good luck with your electrical installation.

Sincerely, Igor Vilkov.

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