Ventilation from sewer pipes: distinctive features, pipe sizes, installation rules

Ventilation from sewer pipes in a private house is an effective solution for arranging the highest quality air exchange. But this installation option has both advantages and disadvantages. But some builders take risks, since the cost of the work is much less than using standard methods. In addition, there are many examples of the successful use of plastic pipes as ventilation ducts in private homes.

Why do I need a ventilation system in a private house

In order to live and work normally, a person needs a lot of oxygen. If in a private house all rooms are closed, there are no ventilation ducts, then the air mass is very quickly saturated with carbon dioxide, a variety of fumes, as well as combustion products. In these rooms, as a result, it will be not only unpleasant to be, but also significantly increase the risk of deterioration of well-being. The fact is that air is an ideal environment for the spread of various pathogenic viruses and bacteria. It is to improve the microclimate that ventilation from sewer pipes in private homes is necessary.

Therefore, it is necessary to systematically ventilate the room, and this is not always convenient. Even if you live in a small one-story house, for this you will need to immediately open several windows, and most importantly - do not forget to close them after a while. As you know, nobody needs these chores.

Therefore, builders have long found and are actively using a good way to improve the microclimate - a ventilation system is installed in the house, which allows air exchange. The system also allows you to solve one important problem - ventilation of the house from sewer pipes can remove all unpleasant odors from the kitchen and bathroom.

The advantages of using plastic pipes

If you focus on fire safety rules, all air ducts must be made because of non-combustible material. It can be galvanized pipes or bricks. But for many years now people have been using, and quite successfully, other materials for these purposes. Polypropylene and plastic are very popular. Gray pipes for sewage with a section of 110 mm are at least two times cheaper than similar galvanized pipes. By analogy, you can make ventilation in the garage from sewer pipes.

As you know, this is the most important criterion when choosing a material for the manufacture of ventilation. But sewer pipes have other advantages:

1. The tightness of the connection is provided as high as possible. It does not compare with the tightness of the metal duct connections.
2. Due to the fact that there is a wide range of bends, revisions, tees on sale, you can perform both sharp and smooth pipe turns at absolutely any angle.
3. Plastic pipes for sewage are very convenient to install.
4. Inside the pipe are smooth, there is no obstacle to the movement of air. It moves inside the pipes at the highest possible speed.
5. Such pipes are sold in any building materials store.

As you can see, the use of sewer pipes for ventilation is not a necessary measure, but a rather good way of doing work.

The disadvantages of plastic pipes

But it is necessary to take into account the negative properties of sewer pipes. Do-it-yourself ventilation is carried out quickly, but there are some nuances:

1. Pipes that are designed specifically for use in ventilation systems can be of rectangular and circular cross-section. Rectangular are good because they save a lot of space. A flat duct will take up much less space than a round duct. As you understand, sewer pipes are only round, they do not have this advantage.
2. There is a risk of electric charge accumulation during the passage of air flow through the pipe. As a result, the dust will begin to attract, it will settle on the walls of the pipeline inside. But in practice it turns out that all these fears are very exaggerated.

Many builders suspect that plastic during operation of the supply duct will begin to emit a variety of harmful substances. To prove this, as well as to refute, is quite difficult. Therefore, there is only one thing left - to hope that manufacturers do not lie when they say that sewer pipes are completely safe from an environmental point of view. And now let's look at how to make ventilation from sewer pipes on our own.

How to calculate pipe diameter

In order to calculate the duct section, you need to use a simple algorithm:

1. Calculate the volume of air in all rooms, for this you multiply three parameters - width, length and height.
2. Add up all the data received.
3. Find the required amount of air flow, for this you need to multiply the total value by the rate of air exchange, which must be observed. For living quarters, the air must be completely changed at least once per hour.
4. Round the resulting value up.
5. Find the required pipe diameter using the diagram given in our article.

The scheme of the ventilation device from pipes in a private house

Before you make a diagram, determine the system, what type of ventilation you plan to use in the house. There are 2 types in total - forced and natural. Of course, in these systems the device is different. Is it possible to make ventilation from sewer pipes, their purpose is somewhat different. Oddly enough, ventilation can be made from this material, and its quality will be the same as when using brickwork or metal pipes.

When choosing, you need to focus on the following requirements that apply to the ventilation of private houses:

1. It is necessary to ensure the outflow and air flow in both residential and all auxiliary rooms. Therefore, it is imperative that the air changes in the bathroom, kitchen, shower, laundry, and other rooms.
2. Air exchange is carried out by installing exhaust and supply channels, valves. And also with the help of slot ventilation.
3. In all internal rooms, it is necessary to equip the doors so that there is a gap of about 20 mm between the threshold and the lower part of the canvas.
4. In the event that the exhaust channel works much more efficiently than the supply air, you can compensate for the difference by opening the window leaves.
5. The supply duct must be located close to the heat source. This will allow warming the air coming from the street in cold weather.

The ventilation scheme of a private house should be developed either independently or by specialists. As a basis, you need to take a plan of the room on which to carefully lay out the wiring of all pipes, of course, you need to focus on all the requirements and rules.

Ventilation device

And now let's look at the general information that is typical for the ventilation device of any private house:

1. When installing natural-type ventilation, it is best to use plastic pipes with a perfectly flat surface inside. Corrugated pipes may only be installed if it is planned to produce supply and exhaust ventilation.
2. The fewer turns and bends of the pipeline, the more efficient the system will be.
3. It is recommended that all ducts be routed along the shortest path from entrance to exit.
4. If you equip natural ventilation, you need to make exhaust pipes more than 5 m high. Otherwise, the draft will be very weak. In the event that you cannot provide such a height, then you will need to install fans in the exhaust ducts on the upper floors.
5. In the manufacture of forced ventilation it is necessary to adjust the power of the impellers so that the amount of supply air is slightly less than the volume of output. In this case, you will achieve a decrease in pressure in the system, and this will favorably affect the general microclimate of the room, as well as the condition of all building structures.
6. In the manufacture of natural circulation, air can be taken both from the street and from the basement.
7. The most optimal amount of air for a room of 40 square meters. meters will be approximately 120 cubic meters. m per hour.
8. The inflow can be carried out in two ways - infiltration, thanks to the cracks and ventilation of the windows, as well as controlled, which occurs with the help of fans installed in the pipes, as well as climate control systems.
9. Exhaust ducts must be placed at a distance of 25 cm from the ceiling.

Correct channel aggregation

When combining channels, you need to consider the following nuances:

1. Only channels of the same type may be combined. In other words, the ducts of the bathroom and living room cannot be combined. It is allowed to connect the bathroom with a laundry room, a bathroom, as well as any technical premises.
2. For the kitchen, it is necessary to lay a separate channel, it is forbidden to combine with others.
3. The ventilation duct must not be led into the chimney from the stove or fireplace.
4. It is also forbidden to combine the ventilation duct of the kitchen and the hood, which is installed above the stove for cooking. To extract, you must use a separate duct. It is worth noting that most modern models of hoods have a remote unit, which is located in the attic.
5. It is allowed to combine exhaust pipes of several bathrooms at once, but at the same time it is necessary to install a check valve to prevent odors from one room to another.

The output of channels through the roof

And now let's look at how to remove ventilation ducts through the roof in a private house.

To do this, you need to know the following points:

1. In the event that the distance from the ridge to the ventilation pipe is less than 15 cm, it is necessary that the pipe be raised by about 50 cm. In the event that the distance is from 15 to 30 cm, the exhaust pipe should be led out onto the roof slope by about 10 degrees lower than the location of the skates.
2. The most optimal way to remove the duct through the roof is to combine all the pipes into one structure, a kind of box. It can be installed no more than 6 pipes. In the roof it is necessary to make an opening under a metal box. As a rule, it is much easier to seal and make it than to remove several air ducts through the roof at once.
3. In the event that there is a ventilated space under the visor, then all exhaust ducts must be brought out under it.
4. So that the pipes that are led out onto the street do not freeze in winter, they must be installed at an angle. This is true for the supply and exhaust system. If the ventilation is natural, then it is impossible to predict whether icing will occur in winter or not. All this depends on the mass of conditions, both domestic and climatic.
5. Please note that a distance of more than 35 cm must be maintained from the exhaust pipe to the balcony or the nearest window.

Channel insulation and traction reinforcement

Many people wonder if it is necessary to warm the ventilation ducts. There is one answer to this - you need to insulate the pipes that pass through the attic, as well as through any unheated room or along the street. In the same case, if you use forced ventilation, you may need to insulate the air ducts in all rooms to reduce noise.

As for ventilation enhancement, it is possible to install deflectors on all exhaust channels. There are many models of both domestic and foreign production. It is advisable to install hygro-adjustable air supply devices on all windows, except for bathrooms, kitchens, technical rooms.

Ventilation schemes

It is necessary to pay attention to the fact that there are several schemes according to which ventilation is made in private homes. Three most popular ones can be distinguished:

1. The air first enters the living rooms, and leaves the house through the channels that are in the bathroom, toilet, kitchen.
2. The inflow is carried out in the living rooms on the first floor, and the outflow of air is made in all rooms on the second floor.
3. Air is taken in with the help of supply fans, and it is discharged through a special fan pipe or hood in the bathroom, as well as through a window in the kitchen.

As you know, you can choose any of these schemes, it all depends on which house you make ventilation in.

The use of plastic in forced ventilation

From sewer pipes, air ducts must be fixed to the ceiling or walls using metal clamps or plastic clips. Before connecting the pipes to each other, machine oil must be applied to the end of the receiver. In this case, you can facilitate the installation work. All joints must be sealed with moisture resistant silicone compounds. In order to mount the duct system, it is necessary to use various connecting elements, the so-called fittings.

Their number and type must be determined at the time of drawing up the ventilation scheme. In order to equip the branches, you need to use tees. To connect the pipe segments, couplings will be needed, and bends will have to be used to rotate the duct.

You can easily create an effective forced natural ventilation system yourself, but you will need to follow all the requirements of SNiP and the recommendations of specialists. In conclusion, I would like to say that sewer pipes are ideal for manufacturing ventilation in a private house. Therefore, you can make ventilation from sewer pipes with your own hands, a photo of such systems is given in our article.