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The emergency pressurization fan is a very important system that ensures that during a fire, the stairwell has much more pressure than the rest of the building. This way, when the doors are opened, the high pressure in the stairwell pushes the smoke back down to the ground floor, effectively clearing the escape area of smoke.
This smoke-free escape route also serves as a smoke-free entry route for firefighters fighting the fire. The fire alarm system automatically opens when it detects smoke. If the firefighters have not opened the fire alarm system and the pressurization fan system for safety while fighting the fire, they are opened again by the firefighters.
When people in the building open the doors to reach the stairs while escaping from the fire, the smoke will naturally move towards the stairwell at the base where the fire originated. In this sense, the stairwell pressurization fan, which pushes the smoke towards the ground and keeps it away from the stairwell with ERF Group high capacity pressurization fans, re-pressurizes the air in the stairwell.
Emergency pressurization fan; It is known as preventing smoke from entering the fire escape and elevators, making it easier for people to reach a fire-free area and providing a convenient access route for firefighters. According to the regulation on the protection of buildings other than residential buildings from disasters such as fire, fire safety fans must be applied to the stairs if the stairwell is more than 30.5 m in all buildings.
In houses, the height in question is 51.50 m. When emergency pressurization fans are operating and the doors are closed, the difference between the stairwell and the building usage should be at least 50 Pa. This pressure difference aims to prevent smoke from leaking from the usage area to the elevator bucket or the stairs.
In this sense, ERF Group prevents a possible leak by producing different pressurization fans for safety. Fans produced with EC cells, roof-mounted axial fans, AC cell fans, ladder and lift pressurization, axial cell fans are available for their products.
In high-rise buildings, stairs are generally designed to represent a single exit route. As a company, in the production of emergency pressurization fans, it is considered mandatory that the exit stairs are smoke-free and comply with the design in question. Accordingly, the following is required in many buildings:
In buildings where people actively live, there is a tendency for the fire to go towards elevator shafts, stairs and other vertical shafts due to factors such as thermal expansion, smoke, natural convection and chimney effect that occur during a fire. At this point, the smoke spreading into the building prevents the fire brigade from intervening and prevents people from escaping the environment safely.
Emergency pressurization fan models provide advantages to users as one of the most important ways to solve this problem. In recent years, emergency pressurization fan features designed to protect the stairwells of high-rise buildings from smoke bring many privileges. Our company designs pressurization systems to prevent smoke from being in the stairs, elevator shafts and vertical shafts, and on the other hand, to restrict smoke in the area where the fire started and to create high pressure through mechanical ventilation to remove smoke from the fire area.
In this way, ERF Group pressurization systems prevent smoke from spreading throughout the entire parking lot, allowing people to escape much more safely and ensuring that fire escapes are smoke-free. At the same time, it helps firefighters reach the source of the fire in order to intervene in the fire.
ERF Group is a company that designs emergency pressurization fan models in accordance with the regulations. Especially in high-rise buildings, stairs generally represent a single exit point after a fire. Accordingly, fire exit stairs must be smoke-free and have design features that increase the exit speed of people living in the building.
Many building regulations require that fire escapes in high-rise buildings be pressurized to keep smoke out. ERF Group serves various purposes in this regard with emergency pressurization fan systems for stairwell pressurization. It prevents smoke from passing into refuge areas, stairs, elevator shafts or similar areas. It creates a livable environment in refuge areas and exit routes for the time required for smoke evacuation. By increasing the visibility of the team coming to fight the fire in the building, rescue and fire operations are successfully carried out. Therefore, it is possible to see emergency pressurization fan models as a mandatory system that must be in every building for human health, in accordance with the working principle.
Pressurization fan systems use a variety of mechanical fans to create a positive pressure in the stairwell. Two basic pressurization principles are maintained:
ERF Group classifies the stairwell and lobby as a refuge, escape routes and habitable environment in the installation phase. These are repeated continuously at the same location on each floor level for at least several consecutive floors.
The emergency pressurization system is a mechanical ventilation system. In order to pressurize the stairs of vertical buildings, fan sets that suck the fan air in the stairwell and keep the pressure at 0.10-0.45 water indicator must be installed. The main purpose at this stage is to prevent smoke from leaking inwards when a fire occurs. The system consists of the installation of an electric motor fan mounted on an isolated section. The outside air comes out through a shutter with a particle filter. Excess air is discharged with automatic and manual dampers that are calculated appropriately and installed in appropriate places. The most important detail to be considered in this case is that it is implemented in a fully organized manner by ERF Group.
The emergency pressurization fan system consists of the following two components:
The air inlet is fed by fans at this point. Installation is made with distribution systems consisting of ducts, terminal diffusers and ventilation arrangements. An automatic air vent is installed to expel excess air and prevent excessive pressure formation when the doors are closed. An automatic control system consisting of fire alarms, safety switches, smoke detectors and devices placed in a suitable position for the fire service is provided. In this regard, ERF Group carries out highly qualified and complete studies on every detail that needs to be taken into consideration.
In emergency pressurization, the pressure should not be too high. Exceeding the maximum level will make it more difficult to open the door with manpower. Therefore, in ERF Group studies, the pressure is carefully calculated during assembly and construction and kept at a suitable level. The door should not be closed immediately after entering during smoke. If the door is open, the gaps will widen and the air coming from inside the stairs will tend to go out. After a while, it becomes possible to balance the air between the escape point and the area outside the fire.
This will cause the air to contain fire and smoke, and the poisonous gas will return inside the staircase. At this point, our company continues to provide suitable designs reliably. You can visit our website to experience the ERF Group quality and experience of many years of work, and contact our expert team to supply the products you need with a single click.
