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Mechanical Smoke Ventilation Systems (SHEVs)

Smoke and Heat Exhaust Ventilation Systems

Mechanical smoke ventilation systems, often referred to as SHEVs, are crucial role in ensuring the safety of occupants and protecting buildings during a fire incident. These systems are designed to control the movement of smoke and heat, allowing for the safe evacuation of occupants and aiding firefighting efforts.

These systems, along with natural smoke ventilation systems, are commonly referred to as SHEVs. They form part of a building's "Life Safety System". This term is used to describe essential things put in place in order to save lives. These systems are designed to facilitate the safe escape of occupants in the event of a fire and also enable the fire to be fought in its early stages.

By keeping escape routes such as corridors and staircases clear, mechanical smoke ventilation systems allow for the safe and compliant evacuation of buildings. They provide suitable access into the building for the fire services.

We are dedicated members of the Smoke Control Association. G.S Stothers Smoke Ventilation Specialists are at the forefront of promoting and enhancing the design, supply, installation, and commissioning of these systems. We prioritise the use of independently tested and certified products. We also ensure the highest standards of quality and reliability in all our installations.

What are Mechanical Smoke Ventilation Systems

Mechanical smoke ventilation systems revolutionise the management of smoke during fire incidents, harnessing the power of fans to actively extract smoke through specially designed dampers, grills, and vents. These systems often incorporate a smoke shaft, which can be remarkably compact yet highly efficient in their operation.

When compared to natural ventilation systems that rely on the unpredictability of natural airflow, mechanical smoke ventilation systems offer distinct advantages. By utilising powered fans, these systems deliver enhanced efficiency and precise control over the movement of smoke. Instead of relying solely on the natural forces of wind or pressure differentials, mechanical systems provide a reliable and effective means of swiftly removing smoke from corridors, lobbies, and other critical areas.

There are two primary types of mechanical smoke ventilation systems: Mechanical Smoke Extract Systems (MSVS) and Pressure Differential Systems (PDS). MSVS is the more prevalent option, designed to extract smoke from the affected areas using mechanical fans and dedicated smoke extraction points. PDS, on the other hand, operates by creating a controlled pressure differential between different areas of the building, either through pressurization or depressurization.

Mechanical smoke ventilation systems offer enhanced controllability, allowing for precise management of smoke movement based on the unique requirements of each building. These systems can be integrated with advanced detection systems and fire alarm interfaces to ensure rapid activation in the event of a fire, providing a prompt response to safeguard occupants and mitigate potential damage.

Working with G.S Stothers

G.S Stothers Smoke Ventilation Specialists excel in the design, installation, supply and commissioning of mechanical smoke ventilation systems, as well as maintenance packages for all types of smoke & heat ventilation systems. With our expertise and commitment to excellence, we ensure that each system is tailored to meet the specific needs and regulatory standards of the building, providing optimal smoke management capabilities to enhance fire safety measures.

Both natural and mechanical ventilation systems offer distinct benefits, and the choice between them depends on various factors. Mechanical systems, although more expensive, provide significant advantages that can influence building design decisions. These systems allow for the extension of corridors without compromising smoke control effectiveness. Unlike natural systems, they are not reliant on favourable weather conditions for optimal performance. Additionally, mechanical ventilation systems occupy less space within the building, providing greater flexibility in architectural design.

On the other hand, natural ventilation systems have their own merits. They generally require less maintenance compared to their mechanical counterparts, resulting in lower long-term costs. Natural systems are often more cost-effective when it comes to achieving compliance with ventilation regulations.

When faced with the decision of whether to opt for natural or mechanical ventilation, it is crucial to make an informed choice tailored to the specific needs of your building. Our team of experts at G.S Stothers Smoke ventilation Specialists possess in-depth knowledge and experience in selecting the most suitable ventilation system for your unique requirements. We take into consideration factors such as building design, compliance regulations, maintenance considerations, and budget constraints to ensure the ideal solution is implemented, optimising both fire safety and operational efficiency.

“G.S Stothers M&E Engineering have carried our various designs and installations of smoke ventilation systems for FM Stewarts for over 20 years. Every aspect of the project is handled in a professional manner from the initial enquiry to the commissioning / handover stage.”
Philip Sweetlove
Director, FM Stewarts & Associates Ltd

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