The presence of ventilation in rooms with the constant presence of people and animals is the key to their health and well-being. Not everyone can install a ready-made ventilation system due to the high price. Ventilation in a house or garage from sewer pipes is no exception.

Figure 1. Outdoor ventilation outlet

Sewer pipes are available to absolutely everyone. Due to the low price and high quality of the materials used for the ventilation system, everyone can buy them.

Figure 2. Dividing ventilation into several rooms

Making ventilation from pipes is not difficult. First you need to calculate all the necessary equipment and material, and then assemble a working ventilation system for your home or garage. This article will help with this.

Technical characteristics and properties of plastic pipes


Materials for the manufacture of sewer elements:

  • Polyurethane;
  • Polyethylene;
  • Polypropylene;
  • Polyvinyl chloride (aka PVC).
Figure 3. Sewer pipes

The above materials are completely safe in relation to nature and humans. They can be used as sewer elements and in more complex life support systems.

If you choose a material, then the most worth giving preference to PVC. It is not afraid of moisture, is not subject to destruction under the influence of UV rays or temperature changes. Weakly burns even with the use of flammable agents. What you need to build a good ventilation system.

Figure 4. PVC pipes

Advantages and disadvantages of ventilation from sewer pipes


The ability to build your own ventilation system from sewer pipes has a number of subtleties and nuances. Ignoring them, you can harm the future ventilation system or even the residents of the house / apartment.


  • Low assembly cost. If during assembly there is damage to the material, then buying a new one will not cause any difficulties.
  • Sanitary waste pipes are safe for humans and the environment. The products of their combustion and decomposition will also not bring any harm to the body.
  • Ease of installation. Even an inexperienced master can assemble a home version of exhaust ventilation. All PVC pipes are equipped with tight connecting elastic bands, they can be assembled literally with “bare hands”. The design and configuration can be any. A variety of adapters will help to get around the corner of any shape and complexity.
  • Long service life. With a good set of circumstances, such ventilation will last up to 10-15 years without replacing its elements.
  • Secrecy of the gasket. In the case of plastic pipes, everything is simple — they can easily fit even in the tightest corners of the room.
  • Fans and other equipment are perfectly combined with them. To do this, you don’t even have to buy adapters or come up with complex bends. Design features allow you to connect everything directly.
Figure 5. Fan


  • If handled carelessly, the structure can easily be damaged. To do this, it is enough to hit a solid surface or inaccurate impact with a tool.
  • Increased accumulation of moisture and condensation. The cavity of the pipes is solid, respectively, it has no possibility for air to enter. Against this background, condensation occurs.

Installation steps


Do-it-yourself ventilation in a private house from sewer pipes is quite simple. First you need to determine the type of system. There are 2 of them — natural and forced.

Natural is carried out due to traction, which arises from the difference in pressure on the surface and inside the pipes. In forced mode, this task is performed by a special device (fan). It builds up pressure inside the system and throws the accumulated gases out.

Figure 6. Scheme of natural ventilation

It should be noted that the use of lattice fans significantly reduces the amount of accumulated condensate.

Arrangement rules

Ventilation can be laid in an already prepared sewer cavity (in old apartments it is located in the bathroom and in the kitchen). Here, all the details can be hidden from view and you do not have to carry out additional work to dismantle the walls. In the garage, you can run along the wall or in the farthest corner, where it will not interfere with moving and performing any work.

Branches are insulated not only on the street, but also indoors. To do this, you can use foil insulation or its analogues.

The outlets to the street and the house are covered with bars. On the street, this will protect against snow, and indoors, it will prevent excess debris from getting inside.

Figure 7. Indoor and outdoor protection

Do not install ventilation near high-voltage wires. Masters do not recommend doing this, since if you need to change the wires, you will also have to destroy the ventilation system.

Material calculation

The main point in the calculations is the selection of the correct length and cross-sectional area of ​​\u200b\u200bthe pipe. The longer and wider the pipe, the stronger the pull effect will be. This applies to both natural and forced systems.

The number of pipes is calculated using the same system. If one pipe is not enough, then another one must be added nearby or a larger diameter of the first must be used.

Equipment and tools

When installing a ventilation system, you will need high-quality tools. These are construction tools that can be found in the garage or bought at the hardware store.

First of all, it is a hammer, a knife (ordinary or special, designed for cutting PVC pipes), a drill or a screwdriver for fixing fasteners. When building a shaft on the roof of a room, you may need brick, cement and everything related.

The forced system will require a working supercharger (fan), which will be installed as a last resort from the inside of the room.

Building codes for ventilation systems

For example, for a room of 25 sq. m. it is better to use pipes with a diameter of 120 to 200 mm. This will be enough to provide air exchange with an intensity of 3 cubic meters. m. per hour (in accordance with the norm of sanitary services). The recommended length is from 5-8 m. The main thing is that the hood for ventilation, or rather its end, should rise above the roof of the building by at least 0.5-1 m.

Use only pipes made of non-combustible or refractory materials. These include PVC, it practically does not burn and is weakly affected by temperature changes.

Recommendations of experienced craftsmen and possible mistakes


Ventilation of a room from sewer pipes usually does not cause any difficulties, but sometimes even experienced craftsmen have difficult moments that can only be solved by resorting to outside help.

The use of sewer pipes implies the use of light construction tools, since all work is carried out on pre-prepared surfaces. It remains only to connect and fix the pipes of the ventilation system. But there are some important points here:

  • It is necessary to fix the pipes at some distance from the walls. A distance of 1-1.5 cm will be enough. This gap will reduce the degree of condensation by creating a thermal cushion;
  • Do not tighten the pipes too much due to their fragility. If you overdo it with the screed, you will have to go to the store for new pipes or fittings.
Figure 8. Mounting example

Frequent mistakes also occur during the construction of a shaft on the roof of a room. Basically, many people use hollow bricks, which is a mistake. Experts recommend using hollow brick. It perfectly holds the temperature and is not afraid of any influences from the environment.

When ventilating a private house, it is worth considering the structural features of the room. If you do not take into account any corner or recess at the calculation stage, then in the next period you will have to buy more material. Therefore, everything must be carefully calculated in advance, but it is better to draw a detailed diagram using engineering programs.

When choosing a fan for a forced system, you should pay attention to its power. The more powerful the fan, the better. This applies to both large and small spaces.

The need for a ventilation system in the garage is not in dispute. In such places, the exhaust ventilation system must be located in such a position that it does not interfere with movement or work.

Installing a ventilation system from sewer pipes is a simple process, but at the same time requiring special attention from the selection of material. Properly selected material is the key to a high-quality exhaust system!


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