MSVS Residential Building Diagram

Residential Building Mechanical Smoke Ventilation System Diagram

The following diagram illustrates the components and arrangement of a Mechanical Smoke Ventilation System in a residential building.

Mechanical Smoke Ventilation Systems (MSVS) are an alternative method to natural smoke ventilation, providing means of escape and access for firefighting services. Depending on the building design, MSVS can provide significant advantages over a natural system in terms of smoke clearance as well as both cost and space savings.

As you can see from the diagram, a Mechanical Smoke Ventilation System comprises of a mechanical extract shaft that serves the common corridor and lobby. Replacement air is provided from the stairs using a pressure-controlled door closer. This action depressurises the stairs, allowing a large quantity of fresh air through the lobby meaning smoke cannot flow into the stairs.

In a Residential Building, when smoke it detected within a protected lobby, only the fire damper to the smoke shaft on the fire floor will open (all other dampers will remain locked shut). In turn, the vent at the head of the staircase will open allowing the smoke to be removed and make up air for the smoke ventilation system. The fan at the top of the mechanical smoke shaft extracts the smoke and prevents migration of smoke into the adjacent compartments.


We have marked the main components of our Mechanical Smoke Ventilation System on the building diagram. Just hover over the pinpoints to learn more about that particular item and its role in Mechanical Smoke Ventilation.


For further information or to discuss the smoke ventilation requirements for your project, please call us on 01322 387411

Mechanical Main
Extract Shaft

Our systems comprise of a mechanical extract shaft that serves the common corridor and/or lobby.

Car park smoke
impulse fan

The car park smoke extraction system is required to exhaust pollutants produced by vehicles and, in the event of fire, clear smoke to assist the fire service

Stair Ventilator

On detection of smoke the vent at the head of the staircase opens.

Smoke Detector

The smoke detector detects smoke within the lobby/common corridor which sends a signal to the Firesmart panel of a fire activation for when the fire brigade attend.

Smoke Shaft
Damper

On detection of smoke within the lobby, only the fire damper to the shaft on the fire floor will open.

FireSmart
Control Panel

The Firesmart panel will report the fire zone so that the fire brigade will know what level the fire is on.

Manual Call Point Firemans Override Switch

The firemans override switch is used by the fire brigade on arrival to put the system in fire fighting mode or switch it off depending on the situation.

Smoke Extract
Fan Set

The duty fan at the top of the mechanical smoke shaft extracts the smoke from the common area and prevents migration of smoke into the escape stair.

Door closer

Replacement air is supplied to the common corridor and/or lobby from the stairs by the means of a pressure controlled door closer.