Natural ventilation – the easiest solution for the ventilation of premises: the apartment. Natural ventilation is based on the difference in pressure in the room, duct and on the street. Thus, a thrust, as in smoke tube. Airflow from the room temperature is higher and therefore rises, taking with him an excessive moisture or odors. These natural ventilation systems are installed in virtually all bathrooms and kitchens. This system has undeniable advantages.
First of all, you do not need anything extra to install, purchase any device, waste electricity, etc. Also, do not need to carry out maintenance, monitor the proper operation of the system – at the elementary laws of physics, everything works flawlessly. But there are not very pleasant moments. The fact that such a system based on the principle – of the premises appears exactly as much air as it is served. Previously, this presented no problem. In the Soviet house enough air seeped through the windows, in addition, specially opened windows for ventilation. In The modern apartments, mostly, are plastic windows. No gaps, so the air does not leak through them.
In addition, the windows open to ventilate less and less because of the unbearable noise in the street. Moreover, There are a number of factors that affect the operation of natural ventilation from the wind direction to air temperature in the street. These factors are not subject to man, and therefore can not constantly monitor the quality of such system. But there are several ways to improve natural ventilation. Usually installed a special device that controls the flow of air entering the room. This device is a hole (usually near the battery). In this hole is mounted shumoglushaschaya cassette. The interior and exterior lattice placed with regulatory valves. Inserted between the gratings purifying filter. It called the supply air valve. Installing such a valve can cost anywhere from 50 to 200 dollars. It all depends on the type of wall on which you want to install the device. Supply valve certainly solves the problem of ventilation in warm season, but winter can be a problem because of the inability to open the valve for a long time.