Positive pressure ventilation (PPV), are ventilation systems that stop the spread of smoke through buildings to increase the likelihood of safe evacuations in the event of a fire.
The Smoke Control Association (SCA) regulations dictate that lobby ventilation is required either by natural ventilation or mechanical smoke control systems and how to meet these standards.
How It Works
The system works by driving air into a lobby or stairwell, moving high-pressure air into low-pressure areas, forcing smoke out of the communal areas meaning people can evacuate safely.
The unit is operated by a smoke detector and will continue to run until it is reset.
This reduces the risks during a fire as people will be able to vacate the building safely.
Contact us to discover the best PPV unit for your building.
What a Unit Contains
The PPV unit contains duty and standby fans, duty and standby fire dampers, a smoke detector interface, single phase automatic electrical change over switch, controls, status LED and a volt free contact for 3rd party monitoring.
The primary benefit of the PPV unit is evacuating smoke in the event of a fire meeting safety regulations and ensuring compliance. However, other benefits include: the unit takes up minimal space, are relatively cheap to buy and install causing little disruption to your building and the units can be used for buildings or car parks.
The extraction of smoke and heat build up in any building can often be a difficult task to overcome. However, the inclusion of window automation systems can provide a simple ventilation system that meets with Building Regulations.
When creating a smoke ventilation system, natural ventilation provides a simple, reliable solution, with low noise and energy usage. The use of windows as natural smoke vents is a popular choice, as they are often already included in a building’s design, and can increase the amount of natural light in an area, which wouldn’t be possible when using dedicated vents. But what is the 'free area' and how is it calculated?
When it comes to specifying, installing and maintaining fire systems, it is important to remember the purpose and importance of smoke ventilation. This mini-guide looks at the options and professional support available when it comes to smoke ventilation specification.
Smoke Venting Brochure
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"Brilliant piece of kit. Easy to install and perfect for holding keys and fire documents. All delivered within 48 hours."
"Bought as a replacement for an existing unit. Very easy to fix as it only required the main cable to be trimmed and connected. The service from Be Safe Direct was excellent. Delivery was prompt and packaging excellent. Made even better by an extremely keen price."