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

2024 Author: Aaron Duncan | [email protected]. Last modified: 2023-12-16 03:30

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 work is much less than when using standard methods. In addition, there are many examples of successful use of plastic pipes as ventilation ducts in private homes.

Why do we 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 masses are very quickly saturated with carbon dioxide, various fumes, and also combustion products. In these rooms inas a result, it will not only be unpleasant to be, but the risk of deterioration in well-being will also increase significantly. The fact is that the air is an ideal medium 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, this will require you to open several windows at once, and most importantly, do not forget to close them after some time. As you understand, no one needs these chores.

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

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 people have been using, and quite successfully, other materials for these purposes. Polypropylene and plastic are very popular. Gray sewer pipes with a cross section of 110 mm are at least two times cheaper than similar galvanized ones. By analogy, you can make ventilation ingarage from sewer pipes.

As you understand, 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 ensured as high as possible. It cannot be compared with the tightness of metal duct joints.
2. Due to the fact that there is a wide range of bends, revisions, tees on sale, you can perform both steep and smooth pipe turns at absolutely any angle.
3. Plastic sewer pipes are very easy to install.
4. Inside the pipes are smooth, no obstacles are created for 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, using sewer pipes for ventilation is not a forced measure, but a pretty good way to get the job done.

Disadvantages of plastic pipes

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

1. Pipes that are intended directly for use in ventilation systems can be rectangular and round. Rectangular ones 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 have this dignityno.
2. There is a risk of electrical charge buildup when air flows through the pipe. As a result, dust will begin to be attracted, it will settle inside on the walls of the pipeline. But in practice, it turns out that all these fears are greatly exaggerated.

Many builders suspect that plastic during the operation of the supply channel will begin to release a variety of harmful substances. Proving this, as well as disproving it, is quite difficult. Therefore, only one thing remains - to hope that manufacturers do not lie when they claim 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 yourself.

How to calculate pipe diameter

In order to calculate the cross section of the duct, 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 received data.
3. Find the required volume of air inflow, for this you need to multiply the total value by the air exchange rate that must be observed. Living quarters require the air to be completely changed at least once every hour.
4. Round up the resulting value.
5. Find the required pipe diameter using the chart in our article.

Scheme of a ventilation device from pipes in a private house

Beforedraw up a diagram, determine the system, what type of ventilation you plan to use in the house. In total there are 2 types - forced and natural. Of course, these systems have a different device. Is it possible to make ventilation from sewer pipes, they have a slightly different purpose. 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 for ventilation of private houses:

1. It is necessary to ensure the outflow and inflow of air both in residential and in all auxiliary rooms. Therefore, it is imperative that the air is changed in the bathroom, kitchen, shower room, laundry room, 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 interior spaces, it is necessary to equip the doors so that there is a gap of approximately 20 mm between the threshold and the bottom of the leaf.
4. In the event that the exhaust channel works much more efficiently than the supply one, you can compensate for the difference by opening the windows.
5. The supply duct should be located close to the heat source. This will warm up 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 floor plan,on which to carefully draw the layout 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 ventilation, it is best to use plastic pipes with a perfectly flat surface inside. Corrugated pipes can only be installed if supply and exhaust ventilation is planned.
2. The fewer turns and bends in the pipeline, the more efficient the system will be.
3. It is recommended that all ducts be routed as short as possible from inlet to outlet.
4. If you equip natural ventilation, you need to make exhaust pipes with a height of more than 5 m. Otherwise, the draft will be very weak. In the event that you cannot provide such a height, then you will need to mount fans in the exhaust ducts on the upper floors.
5. In the manufacture of forced ventilation, the power of the impellers must be adjusted 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 have a positive effect on the overall microclimate of the room, as well as on the condition of all building structures.
6. In the manufacture of natural circulation, air can be taken from both the street and 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. Inflow can be carried out in two ways - infiltration, thanks to slots and ventilation of windows, as well as controlled, which occurs with the help of fans installed in pipes, as well as climate control systems.
9. Exhaust ducts must be placed 25 cm from the ceiling.

Correct merging of channels

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

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

Output channels through the roof

Now let's look at how to bring 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. slope, about 10 degrees lower than the location of the skates.
2. The most optimal way to bring the duct through the roof is to combine all the pipes into one structure, a kind of box. A maximum of 6 pipes can be installed in it. In the roof, it is necessary to make an opening under the metal box. As a rule, it is much easier to seal and make it than to bring several air ducts through the roof at once.
3. If there is a ventilated space under the canopy, then all exhaust ducts must be brought under it.
4. So that the pipes that run outside 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 guess whether there will be icing in winter or not. All this depends on a lot 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.

Insulation of channels and increased traction

Many are wondering if it is necessary to insulate 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 are using forced ventilation, you may need to insulate the air ducts in all rooms to reduce noise levels.

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

Ventilation patterns

It is necessary to pay attention to the fact that there are several schemes according to which ventilation is made in private houses. There are three most popular:

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

As you understand, you can choose any of these schemes, it all depends on which house you are doing ventilation.

Use of plastic in forced ventilation

From the sewer pipes, it is necessary to fasten the air ducts 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 receiving end. In this case, you will be able to facilitate the work ofinstallation. 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 branching, you need to use tees. Couplings are required to connect pipe sections, 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 comply with all the requirements of SNiP and recommendations of specialists. In conclusion, I would like to say that sewer pipes are ideal for making 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.