The usefulness of smoke ventilation systems in buildings.

Smoke - a very unpleasant and dangerous phenomenon, since it contains harmful gases and fine particles of burning matters. Especially in our time, most of the household items made of materials that, when burned release toxic substances. In this regard, the smoke exhaust system is a necessary element of any communication facilities of social and commercial areas. The use of smoke ventilation quality equipment will help save lives, ease the work of firefighters and significantly reduce damage by fire.

Thus, the main task of the system is to detect smoke fumes and toxic gases, and provide freedom in the evacuation of people from buildings. Usually, the smoke ventilation system is fully automated, so switching on and off takes place in a completely automated process.

What kind of equipment is designed in smoke removal systems?
Smoke removal system includes two types of functions, one of which is used to remove the products of combustion from the smoke-filled rooms (the system of natural or forced ventilation of the fire), and the second creates an overpressure in the spaces (locks) separating fire compartments - air overpressure system in case of fire.

Modern smoke ventilation system include:
Smoke fans- remove the smoke and ash through the system ventilation, as well as limit the spread of smoke through the ventilation channels in other areas (for example, the roof fan). This equipment is made ​​of carbon steel, and the motor has increased protection from the effects of heat transferred. These fan units are installed, as a rule, on the roofs of buildings, as well as directly in the ventilation ducts of premises.
Smoke dampers - intended to remove the heat and smoke from a fire place. When the temperature or the presence of smoke signals, the valve is activated by electric power.

Fire (fire-retardant) valves - provide automatic blocking of the spread of fire and various combustion products at air ducts of ventilation systems and air conditioning systems. These valves are supplied with automatic or remote operation, and by means of electric leads it to a working state.

It also includes fire dampers return valve explosion proof (intrinsically safe) is used in hazardous areas of ventilation systems. It is intended to prevent the overflow of air in the opposite direction through the holes to disabled fans.
The system of ducts.
Control panels.
Finally, it is important to note that the feasibility of smoke ventilation systems should be considered on the base of the accomplishments of architectural solutions for buildings and structures.