How does the extractor fan in the garage: popular circuit technology and proper arrangement

Garage - space relatively small, but its arrangement should not be treated casually. It must protect the vehicle from external influences: weather, theft, etc.

But inside you need to create a useful for people and technology climate. This is not difficult to achieve if the hood is arranged correctly in the garage.

The content of the article:

  • Why ventilate the garage
  • What you need to know about the venting space
  • Features of arrangement of natural ventilation
  • How to correctly calculate all
  • How to correctly perform the installation
  • Combined and forced ventilation
  • Cellar and an observation hole
  • Useful videos on the topic

Why ventilate the garage

Of course, the garage - this is a technical, rather than a residential facility, although some car owners with this statement may not agree. If the motorist spends in the garage much of their personal time, but still uses the basement or garage itself to store food reserves, the more to be concerned about the correct ventilation in such a specific room.

To start, there is high concentration of the exhaust gas, fuel vapor and other fluids. Even a short stay in such an atmosphere is extremely harmful to humans.

Condensate in the garage
If you have poor venting on the walls and ceiling of the garage may appear condensate droplets. In the future, this moisture gets on the vehicle, which could cause it to corrode

A second problem associated with improper ventilation of the garage - is an excess of moisture. Water vapor accumulates indoors and condense on various surfaces, including on the car. As a result, the risk of occurrence and rate of corrosion processes increases dramatically, in other words, the vehicle rusts.

Often in garages or arranged underneath the cellar store vegetables, conservation, other products or things that had no place in a house or apartment. Contact with moisture, and the impact of technological vapor will not bring all these useless objects. And to solve the problem can be simple, just take care of effective ventilation.

What you need to know about the venting space

Anyone who has ever faced the problem of ventilation in the premises, it is known that distinguish natural, forced and combined ventilating system. With the first embodiment is simple: it is based on the difference in temperature inside and outside.

garage ventilation
Organization ventilation without garage inspection pit: arrows "a" indicate the direction of movement air flow, and the letter "b" indicated the location of the air inlet, "B" - the box ventilation

It is known that warm air rises and cold - falls down. The idea is to cool air masses coming into the room from the street, climbed up, and naturally went through the exhaust port. At the same time they must be replaced with new flows of fresh air that enters from the outside.

In the garage is not difficult to organize such venting. To do this, you need to provide a wide enough opening for the inflow and exhaust, but it will be important and the temperature difference inside and outside the premises. In winter, this condition will not cause problems, but here in the summer, when all is worth almost the same heat, the efficiency of the natural ventilation is drastically reduced.

Fresh air grille
To provide fresh air into the garage, you can instead put a hole in the wall at the gate of a special intake grille

An alternative in such a situation is forced ventilation, i.e. using additional means. The supply and exhaust opening set special fans, which, depending on the destination, injecting air into the room, or remove it.

But at the same time to put the two devices for a small garage is not always reasonable and justifiable from the economic point of view. More profitable to use a combined ventilation system for which only one device is necessary. For example, set the supply fan, it brings fresh air and exhaust air masses are displaced through exhaust port.

The garage is considered a more appropriate exhaust system. Mounted fan which effectively removes harmful saturated vapor and air excess moisture. Fresh air mass will come into the room in a natural way through the inflow part of the system.

Features of arrangement of natural ventilation

To ensure the correct natural ventilation garage, you need to remember a number of basic rules:

  • The air intake is placed at the bottom, about 10 cm from floor level.
  • Exhaust air outlet at the top are doing, almost to the ceiling, or even directly in the ceiling.
  • The optimal placement of these openings embodiment - on the diagonal, i.e. if the inflow is carried out in the lower front corner of the hood you need to put in the top far corner.
  • The dimensions of the holes must be properly calculated to provide enough intensive air exchange.
  • Supply opening must always be two to three times larger than the size of the hood.

Well, if the ventilation was calculated and created another in the construction of the garage. If, however, the moment was lost, it would have to fulfill a number of relatively simple installation. It also happens that the ventilation is provided, but the desired results will not provide. In this case, the need to improve the system, for example, by using an exhaust fan installation.

How to correctly calculate all

Ventilation calculations in many cases require special knowledge and the use of sophisticated techniques. If there is a desire and allows wallet, creating a project can be ordered from specialists. Fortunately, the garage - a small room with a simple configuration. The dimensions of the vents is calculated as follows:

Psech = Pgar × 15


  • Psech - sectional area of ​​the vent;
  • Pgar - the area of ​​the garage;
  • 15 - index, which reflects the size of the ventilation holes on the unit area of ​​the room.

Those. you need to multiply the garage area at 15 mm. According to this simplified method for the garage 24 sq. m. (6 * 4) will need a supply opening 360 mm in diameter. These calculations are very conditional, since the method does not take into account the height of the room and its other features.

In practice, these parameters can be varied. Discussed above for garage 24 sq. M., In one particular case, the two tubes have been successfully used by 150 mm on inflow and one such tube - temperature control.

additional funds can be used to improve the efficiency of natural ventilation:

  • Deflector - a special cap which is mounted on the edge of a vertical line segment extraction tube to create a structure within the rarefied atmosphere and accelerate the movement of air masses.
  • Diffuser - a vane to the outer part of the inflow pipe, the pressure of the wind is used for its operation.
  • Conventional incandescent lamp - it is installed inside the exhaust pipe and heats the air flow, accelerating its movement.

These simple devices can significantly improve the quality of ventilation in the garage.

How to correctly perform the installation

For the organization of proper ventilation of the garage will need to make at least two openings for fresh air, and for outputting streams saturated noxious fumes and excess moisture. Supply opening made at the bottom of the outer wall, approximately 10-15 cm from the floor.

The opening for the tube
For arranging ventilation in a garage wall hole needs to be done, which by size and configuration correspond to the characteristics of the pipe

The thick walls of dwellings are drilled using special equipment, but for garages such difficulties are not needed. In most cases a suitable diameter hole drilling is performed by the perforator.

After that is inserted into the opening pipe or pipes for the inflow and fix their position. For sealing gaps between the pipe wall and the material of the mounting foam used. The outer side of the hole should be protected by a special grid or diffuser.

Grilles for ventilation
Outside place input air supply pipe conducted through the wall of the garage, close the decorative grille to protect the room from the penetration of small rodents, insects, etc.

The cross-section of the ventilation duct can be done not only round, but also square or rectangular. For mounting the tube need appropriate configuration. Usually used for garage ventilation pipe with a circular cross section. This is the cheapest and most convenient option, in addition, they create a minimum resistance to air flow. For ventilation and fit metal pipes and structures made of plastic.

exhaust duct ventilation pipe
Exhaust pipe garage ventilation channel be output up to about 50 cm above the roof level to provide good traction

Opening for the extraction is done under the ceiling. The tube is fed through the wall is mounted horizontally and then the vertical segment. It should be long enough. The optimum range hood, which rises above the roof not less than 50 cm. Often top-mounted hood deflector. The inner side and the supply and exhaust openings must be closed with decorative lattice.

Combined and forced ventilation

As noted above, the natural ventilation garage efficiently only under certain environmental conditions, i.e., at a sufficient temperature difference between the air inside and outside. Use of funds forced ventilation makes it possible to eliminate this type of problem.

combined ventilation
Scheme combined venting garage using the exhaust fan. Such a system is not too demanding on the drawing's location

The effective air removal in a garage for more than actual, because the level of contamination is considerably higher than in the accommodation. Therefore, the owners of garages prefer the version of the combined exhaust ventilation. To implement a project of this type is not too difficult.

To do this, you need to buy an exhaust fan and install it on the tube inlet. If such a tube is not available, you need to install. This is done in much the same way as the installation of natural ventilation. Calculations, tools and materials will be needed are the same calculations are carried out in a similar manner, but there are a few differences.

Exhaust fan
Exhaust fan - easy to install and use the device to which to draw power. With the self-timer can improve the quality of ventilation

When combined ventilation does not necessarily install the hood strictly diagonally from the supply hole, although such position and desired. You can select another location for the supply and for the exhaust openings. But the first place has yet to bottom, and the second - at the top.

Another important point - the presence of furniture and other objects in the path of air flow. This is a common mistake in the design of ventilation. The smaller of these obstacles, the better will be breathability. The upper pipe should be installed exhaust fan.

This can be a channel model, which is installed inside the pipe, or waybill embodiment, such devices are mounted directly on the wall. After that, the fan should be connected to the power supply. To improve the functioning of such a drawing, can be provided with additional modules fan automatic control. For example, a timer that will enable or disable the device at certain times.

This will allow little to reduce electricity costs, as well as to provide a garage ventilation even in the absence of its owner. If the garage already has natural ventilation, but it works efficiently enough, the best solution is to install an exhaust fan in the finished feed. If natural ventilation is performed fairly well during the winter, the fan can be used only in summer.

Forced ventilation involves the installation and the supply and exhaust fan in the corresponding holes. In conventional parking garages such systems are not typically used, since the problem is solved by a simpler embodiment: natural or combined system.

Make forced ventilation in the garage makes sense only when without it simply can not do. For example, for a garage located under the ground, forced ventilation - the only possible option. It happens that the garage is planned to carry out paintwork or other work in which good ventilation is of particular importance. Where forced-air ventilation will be very handy.

Cellar and an observation hole

Above was considered an option venting conventional garage. If the inside has a basement and / or inspection pit, about these objects care should be taken separately. In the case of a basement necessarily have to make a separate vent. This is necessary because moisture collects at the bottom of a lot more than in the upper part of the room.

basement ventilation in the garage
Scheme basement venting, located in the garage: inflow pipe should be lowered as low as possible, and a stack output high up

If ventilation is not available, this moisture will penetrate into the garage and harm stored therein vehicle. Ventilation, which is arranged in the garage, even when using forced methods inflow and air removal, generally can not provide sufficiently intensive exchange of air masses.

For effective ventilation of the basement should be done two holes: Ventilation and air extraction. It is recommended to provide the air supply in southern cellar, and the output air flow - from the north.

Inflow pipe is generally administered in a cellar through the garage floor and lowered as low as possible. Arrange hood in the opposite corner, this tube outputted through the garage floor upwards and outwards. As in the ventilation device in a garage, the holes for the inflow cross section to be two to three times greater than the dimensions of the hood.

garage ventilation
Here is a variant of the organization of natural ventilation of the garage, which has a basement and an observation hole such that the individual ventilation channels made

The greater the difference in height between the edge of the supply and exhaust, the more effective the venting will cellar. The optimum difference of three meters or more. To increase the difference, the vertical part of the exhaust pipe, which is displayed on the street, you just need to make taller. You can also install the baffle and the protective cover.

Sometimes installing the inflow pipe for some reason is not possible. In this case, it is recommended to leave the door slightly ajar to allow fresh air entering the garage, moved in a cellar. The lack of fresh air will make useless all the efforts to provide efficient extraction of the cellar in the garage.

If the garage is heated in the winter on the exhaust pipe may appear condensed moisture. To prevent icing tube to install special glass condensate. For unheated garage, this measure is not required. Products and items that are stored in the cellar should not be placed closer to winter than half a meter from the supply holes, or they can be frozen.

Venting viewing hole
Scheme natural ventilation garage with a viewing hole: the arrows "a" movement of air streams indicated by "b" - arrangement of ventilation slots for viewing hole

Inspection pit - a small-scale facility, so a separate ventilation for it usually does not provide. And still need to be concerned about a good inflow of air. For this purpose, on the side of the observation hole, which faces the air supply opening a garage, it is necessary to make the gap of about 10-15 cm. You can open up in this way, and the two sides of the pit.

On the exhaust side is also necessary to make such a gap, but it has to be two times already. For the sake of security, you can in some places to cover these gaps with boards. Setting the car, you must make sure that it does not overlap the exhaust slot because it is dangerous for the vehicle.

Useful videos on the topic

Interesting and detailed information on the aeration space garage set out in this video:

This video demonstrated the exhaust channel fan operation:

Here you can see the experience of creating a self-made drawing for garage made of improvised means:

To organize high-quality extract in the garage is not too difficult. It is necessary to choose the right system and install it, or to improve an existing version of ventilation. This has a positive impact on the condition of the car, and the garage owner's health.

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