Installation of air handling units. Air handling unit

What to do if the house began to be feltlack of oxygen, air is saturated with unpleasant odors, and surfaces in rooms are covered with condensate? Probably the reason for this - the lack of airing housing. The elimination of the indicated negative factors allows the installation of air supply ventilation units.

What is intake ventilation?

Forced or forced ventilationcalled the device by which the air in the room by blowing the flow of fans. The work of the latter creates areas of overpressure, the presence of which contributes to the displacement of exhaust air.

During operation of the inlet ventilationInstallation The flow of working air enters the room in several ways. Pass through the ducts integrated into the network or penetrate through street entry points. The most effective scheme of forced ventilation is a combination of elements of forced and natural exhaust systems.

Types

Depending on the scale of action, compact air handling units are divided into systems of general and local action. Consider the features of each of the solutions presented.

Local ventilation ensures air exchange is notin all rooms, but only in a separate part of the object. Most often, such solutions are resorted to, if necessary, to clean up the space in production workshops where a high concentration of harmful substances is observed.

In turn, the total air handling unit allows you to organize the flow of fresh air at the same time in all rooms, without separation of local areas for maintenance.

Design

The main structural elements of the ventilation systems of the supply air type are the following:

• Fan - provides movement of the specified volumes of air in the room.
• Filter - cleans the area from dust, carcinogens.
• Silencer - allows you to reduce the overall noise level during the operation of the system.
• Heater - heats the air distributed by the fan in winter.
• Non-return valve - prevents the outflow of fresh, purified and heated air from the premises when disabling forced ventilation.

Features of choice

Determining criteria for ventilationinstallation of the supply plan - the maximum possible pressure in the system and air pressure, which the unit is capable of issuing. The electric supply unit must also be selected taking into account the working temperature range, the dimensions of the indoor unit. All the necessary parameters are calculated at the design stage.

Characteristics of the air handling unit

What is the air handling unit features? It differs in such parameters:

• Air consumption - the volume of working environment that the system is able to pump within an hour (measured in m³/hour).
• Head - the level of resistance of air ducts that the installation must overcome at a given air flow rate.
• Parameters and coolant source. A heater or hot water flowing through pipes can be used as a means for heating the air space.
• Source of cold supply. Here, the characteristics of a chiller (refrigerating machine) or a freon circuit come to the fore.
• Level of autonomy - the parameters that the installation is able to maintain in automatic mode.

Helpful Tips

Installation of air handling units in the form of a monoblockfor general room ventilation needs a serious approach. Therefore, here you should pay attention to some important points. So, the hot water that comes from centralized heating cannot be used to raise the temperature of the ventilated air. As practice shows, attempts to implement such a plan do not give positive results. Ventilation inefficiently warms the air in the conductive channels with the onset of frost. Combining systems has a negative effect on the performance of heating.

Если установка приточных установок предполагает installation of the refrigeration section; in this case, the air ducts of the forced air supply system are covered with heat-insulating materials. For these purposes, practically any common means with a thickness of at least 40 mm is suitable.

In case of addition of installation watera heater, creation of double protection against freezing is required. It is advisable to install the thermostat behind the heater and the sensor measuring the temperature of the coolant.

After the installation of the supplyinstallations, it is recommended to carry out their periodic inspection and maintenance. The bulk of failures that occur in the operation of such units, is a consequence of the untimely cleaning of filters, fan balancing, checking the condition of electrical components and the efficiency of the fans.

Planning the scale of the air handling unit is extremelyIt is important to organize the correct movement of air flow. Fresh, purified air from the street should fall primarily into the living rooms (living room, bedroom, children), then move into the corridor and go to the exhaust grilles in the kitchen and in the bathrooms. The development of a well-thought-out scheme by specialists during the installation of the air handling unit eliminates the spread of polluted air and unpleasant odors throughout the premises.

Air handling unit - price

Currently, the cost of domesticforced-action ventilation units range from 1,500 to 3,000 rubles. This amount should be added to the installation of the system by professional craftsmen, which often costs 50% of the amount paid for the inlet installation. Save allows independent installation of the ventilation valve. Let's figure out how to cope with this task.

Preparing for installation

Before installing the inlet valves ismake sure the building ventilation system is functioning properly. To do this, it is enough to open the windows, after which bring a piece of thin paper to the vents. If the ventilation is working properly, the latter will tighten into the mine. It is unacceptable to use a match or a lit candle for this purpose, since a flammable situation is likely to occur in the presence of combustible gases in the ducts. If the segment is weakly attracted to the ventilation hole, care must be taken to clean the conductive air paths.

Installation of ventilation

Currently widespreadpurchased compact inflow systems of local action. Such units are easy to install and have proven to be a reliable, energy-saving means for ventilation of individual rooms.

Local settings are really small.However, despite the small size, such systems provide a significant influx of heated or cooled, purified air into the room. Inside the compact box there is a fan for air supply from the street, a cleaning filter and automatic equipment that controls the operation of devices.

For installation of a local air handling unit, the following steps are performed:

1. The installation site is selected. As practice shows, the installation of such systems looks the most rational in areas where there is a large crowd of people.
2. To begin with, a corresponding markup is created, after which a hole is punched in the wall.
3. Forced ventilation is installed on the facade surface close to the window or balcony, as high as possible directly under the ceiling.
4. After completing the opening, the installation of telescopic air ducts. Protective caps are worn on the outside of the walls.
5. Finally, the entire system is installed in the assembly.

As you can see, the installation of the air handling unitdestination is not difficult. The main task is to break through a fairly solid load-bearing wall. To do this, you will have to find the necessary equipment, tools, and personal protective equipment.

If you plan to work in a high-rise building, and there is no way to reach the installation site from the outside through windows or a balcony, it is better to involve specialists in the task.