Forced exhaust device in the bathroom and toilet of a private house

How to make a hood in a private house so that it is fresh, dry and warm? In the toilet and bathroom, this issue is especially relevant. Consider the device of a forced exhaust system with your own hands. The material is provided with video and photo instructions.

natural ventilation

Natural air exchange is possible due to the difference in density and temperature of the air inside and outside the house. Traction force is influenced by:

• channel sections;
• the presence of turns;
• direction and strength of the wind;
• system insulation, etc.

This type of ventilation is a specially arranged vertical channels. The system has gained popularity due to its relatively low price and simplicity of design. The absence of complex elements and mechanical parts determines the reliability of natural ventilation.

Comparison of the operation of ventilation systems in the house

Maintenance of the system is reduced only to periodic inspections to reduce heat loss. Fresh outdoor air warms up faster. The flow in the natural ventilation system is not regulated. This can worsen the microclimate. Operation is virtually silent.

Natural extraction also has a number of disadvantages. For example, depending on the weather. In the summer heat, when the air temperature outside can be higher than in the house, such ventilation does not cope with its direct task. And in winter there are significant heat losses. Insects or street dust can also enter the room.

When choosing the diameter of the ventilation ducts, it is necessary to take into account the amount of air exchange. For a toilet, 30 cubic meters per hour is considered sufficient, for a bathroom 50 cubic meters. at one o'clock.

Forced ventilation

The supply and exhaust system of forced ventilation includes a heat exchanger, filters and fans. The clean air coming from the street is heated if necessary and distributed to the rooms. And the contaminated one is forcibly sucked out. This type of ventilation is characterized by high efficiency and productivity.

Forced ventilation

To organize the exhaust in the toilet and bathroom, fans with bearings or bushings are used. The second option is preferable, since such a device is quieter and has a more affordable price. It is common to connect a fan to a light switch. Then the hood will start functioning as soon as the light comes on. Or they mount a separate switch for ventilation, placing it on the wall or on the device case.

Important! Equipping the input street channel of the ventilation system with filters, constant care is required. They need to be changed regularly, because a dirty filter will not allow enough fresh air to enter the room. And the substances accumulated in it can become a source of reproduction of bacteria and harmful organisms.

Modern technologies make it possible to equip forced ventilation with air humidity sensors. In this case, the mechanism will work as soon as the moisture content indicator reaches the specified parameter. But besides convenience, this option also has a disadvantage. For example, the hood may work while bathing a child, creating an unnecessary draft. There are also ventilation with a motion sensor. They are triggered when someone enters the room. The principle of operation is the same as when connected to a light switch, but the cost of the sensor is much higher.

Advice. Additionally, the ventilation system of the bathroom and toilet can be equipped with timers. Those. there is a possibility of delaying shutdown after leaving the bathroom.

Do-it-yourself ventilation installation

When choosing a fan, it is necessary to pay attention to the fact that the noise level does not exceed 35 dB.

Duct centrifugal blower with reduced noise level

By design, fans can be:

• axial;
• centrifugal;
• centrifugal-axial;
• diametrical.

The first type of fans is mounted if the system is without channels. The centrifugal device has the highest performance, but also works louder than others. The centrifugal axial fan features light weight, quiet operation and high efficiency. The air duct for a private house can be in the form of:

• corrugated pipe;
• profile boxes;
• round or rectangular plastic product.

Exhaust centrifugal fan

If forced ventilation is organized only in the bathroom, and all other rooms are planned to be ventilated, then it is advisable to mount a simple ductless system. Turn off the electricity before installing the fan. Usually, the device has special terminals for mounting. Screwing something with self-tapping screws is usually not required. Connection to the power supply network is carried out using a new two-wire wire.

But if you need to provide forced ventilation throughout the house, you need to purchase special equipment. It is most often located in the attic or in technical rooms. It is a unit that provides the supply of clean air and the removal of polluted air, filtration, heating. You can calculate the power based on the number of residents, the size of the house, the material of the walls. Usually 150-600 m3/h is sufficient. Modern air ducts are assembled according to the principle of a designer and can be masked by suspended or stretch ceilings.

Check valve fan

Properly functioning ventilation is of great importance for the microclimate of the house. Good air exchange in the bathroom and toilet is especially important. After all, the doors in these rooms are often kept closed, and the level of humidity is high. To avoid the appearance of mold on the walls, fungus and other troubles, you need to take care of a high-quality exhaust system.

Installation of the supply and exhaust ventilation system: video

Do-it-yourself ventilation in the house: photo