Supply and exhaust ventilation: operating principle

The main factors that determine the ideal climate in the room are comfortable temperature, normal humidity, mobility and clean air masses. For the creation of a constant and correct air exchange in any room is responsible for ventilation. There are several types of ventilation systems, which differ in their functional features. But the most common and effective system is the intake and exhaust ventilation.

For example, fresh mechanical ventilation filters incoming air from outside, and then distributes it through the duct system to ventilated rooms. Special extra equipment cleans the air masses of dust, and also heats and moistens them.

The exhaust ventilation system is an antipode for forced ventilation and is completely different from the principle of operation. Its main functional responsibility is the removal of the already exhausted air from the premises.

However, both these ventilation systems are ineffective without each other. The volume of extracted air must be compensated by the volume of supply air, otherwise various negative phenomena will appear in the room, for example, drafts, it will be cold, etc. Therefore, the most effective solution is the combination of two systems, that is, supply and exhaust ventilation. With the help of the supply system, fresh air is supplied to the room, and with the aid of the exhaust system, the spent air is immediately removed.

In addition to the fact that the installation of supply and exhaust ventilation is simple enough due to the convenient location of the units and easy operation, this type of ventilation has several distinctive features.

Firstly, this system very efficiently performs air exchange in various rooms, and secondly, the supply and exhaust ventilation allows to reduce operating costs by almost 50% by using heat recovery for the purpose of heating the supply air. Air exhausted from the premises is heated to room temperature, and sometimes even to a higher temperature - for example, if it is removed from the metallurgical shops. Supply air in winter is quite cold - its temperature can reach below a few tens of degrees below zero.

Therefore, it is very convenient and economical to use the heat of the exhaust air to heat the supply air masses. This process is carried out with the help of a special heat exchanger-recuperator, which is additionally equipped with supply and exhaust ventilation.

This scheme of heat utilization is widely used at various sites, for example, in cottages, office buildings, cinemas, cafes and restaurants, hotels, swimming pools, as well as in production facilities.

The intake and exhaust ventilation is installed in a special room - the ventilation chamber. This system is easy to maintain, because All structural elements are located in one place, and access to them is easily carried out through the doors and special hatches.