Natural versus Mechanical Smoke Extraction- Ventilators versus Windows
The greatest hazard of fire is not the exposure to direct flames, but the detrimental effects of spreading smoke and toxic gases. According to recent studies over 90% of fire victims actually suffer from smoke and fume related injuries. Smoke is hazardous and deadly so it must be extracted as efficiently and rapidly as possible before large quantities accumulate and cloud the area.
One of the tenets of fire protection is keeping open and smoke free evacuation routes so trapped people entrapped in burning buildings can escape rapidly and gather in a safe place. In addition, rescue crews must search the burning building and extract every person caught inside. Moreover, the fire should be contained with the least damage to property.
So the quality of smoke extraction solutions depends on speedy and efficient response. The faster an area is smoke free, the better.
Natural smoke extraction utilizes the natural phenomenon of thermal rising in which, hot smoke rises to the ceiling and flows outside through openings in the roof or near it. The rising smoke is concentrated near the opening and flows out. Thus, hot toxic gases are kept near the ceiling while the lower part of the structure remains relatively smoke free.
Mechanical smoke extraction utilizes motorized ventilators installed throughout the structure in order to pump the smoke out.
Natural smoke extraction does not depend on electrical devices and outlets that tend to malfunction and collapse during a fire. Another benefit of natural smoke extraction is its efficiency: the system’s openings are programmed to become wider when the temperature rises. Thus, more smoke can flow out. Moreover, there is no risk of oxygen flowing into the structure and kindling the fire because the openings are designated for smoke extraction only. This rapid flow of smoke outside makes the burning structure safer and predominantly, saves human lives. An integrated smoke extraction system that includes smoke insulation, smoke extraction and highly pressurized water mist units can also prevent and control damages caused when the fire is extinguished.
Natural smoke extraction systems are highly resistant to heat (up to 1000oC) and comply with SII standard requirements. Their components withstand strong wind gusts (up to 3000 Pascal). Their rust repellant chemical coating also withstands natural wear and tear. And of course, our systems undergo rigorous testing and are calibrated for extreme conditions.
Compared to natural smoke extraction, the ventilators in mechanical systems consume the same amounts of electricity continuously. Their pipe diameter is fixed, so the system’s capacity to extract smoke does not change according to the scope of the fire. Therefore, large amounts of hazardous smoke and toxic fumes that should be rapidly pumped out might linger in the building.
Natural smoke extraction systems are critical for saving lives and preserving property. As such these systems have become a standard requirement in many countries. The systems are exceptionally adaptable, convenient and cost effective. You may also consider an extra benefit – fresh air ventilation at all times. No doubt – natural smoke extraction and ventilation has become the accepted professional standard instead of mechanical air pumps and ventilators. This is nowadays the best solution for landlords and homeowners around the world.
