Mechanical Smoke Ventilation Systems

Mechanical Smoke Ventilation Systems

Over 85% of the deaths from a fire are caused by smoke and hot gases. Thus, the evacuation of smoke and hot gases must be carried out as quickly as possible.

One of the solutions for smoke is the organized air circulation. This is done through a roof-mounted system of roof chimneys, vertical hatches, doors and windows with ventilation.

Thus, the non-flammable area of a building must be at least 1% of the total area of the building.

For fast and efficient mechanized dehumidification, the air intake is through the bottom of the building and the lower third of a room. Also, the air intake must be made up of at least 60% of the non-combustible surface. This is mentioned in Normative P118.

In the event of a fire, the doors provide a double role: exhaust and air intake, the door being one of the few elements for which the entire surface can be considered useful in the air intake.

Mechanical Smoke Ventilation Systems | Automated windows

Window automation allows full control over them. Thus, a BMS (Building Management System) or fire detection system can operate the windows to maintain a pleasant environment inside the building and reduce energy costs.

The solutions offered by our company can automate any type of window, regardless of size, and their pleasant design will not affect the appearance of the windows in a negative way.

Automatic windows can be operated by remote control, button or central system.

Mechanical Smoke Ventilation Systems | Types of automation

Automation for windows, doors and hatchways is a very common solution in new buildings in Romania.

These automations can be mounted on any type of window, on doors, but also on ventilation hoods or dehumidifiers. Thanks to the electrical components, automation can be connected to control systems and can be operated simultaneously regardless of their number.

Mechanical Smoke Ventilation Systems | Drive mechanisms

  • Pneumatic actuators, independent in operation by the power grid, providing the greatest guarantee of action in case of fire. The mechanisms may be fitted with one or two pneumatic cylinders, depending on the type of hatch. The automatic operation is carried out by means of a compressed CO2 cylinder equipped with a thermofusible safety device which acts to raise the temperature by opening the roof.
  • manual drive mechanisms by making copper pipe paths linking smoke hatches with manual control panels fitted with a push button and CO2 cylinder under pressure.
  • electrical drives, in which case the hatches are equipped with electric motors ordered by the fire detection system of the building.

In case where the hoods are also used for the daily ventilation function, it is recommended that they be equipped with a rain and wind power plant with external sensors for weather protection.

Non-automated smoke and ventilation systems

Natural smoke dehumidification is accomplished by removing the smoke through cut-outs at the top of the façade or in the roof (zenithal). Compensation with fresh air is done through air intake grilles.