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Thermadome Automatic Opening Vents

ThermadomeTherma-vent smoke ventilators can be used to provide natural ventilation. Effective in reducing smoke build-up, they provide a safer emergency exit for building occupants and safer access for the fire brigade.

Our most common smoke ventilation units are Therma-vent smoke ventilators - Automatic Opening Vents, (AOV's) or Opening Vents (OV's). These vents are positioned at the very top of a smoke shaft or at the highest point of an escape route / emergency exit staircase. A Therma-vent control panel controls the entire system. Manual control points and smoke detectors are then positioned on each floor.

ThermadomeThe control panel is activated by the smoke detector on the floor of a fire, which in turn triggers the Therma-vent AOV, producing an upward air-flow, dispersing all smoke and toxic gases.

ThermadomeThe Therma-vent system can be connected to the Building Management (BMS) for complete monitoring or controlled by instruction of the fire services using the Therma-vent control panel. Alternatively, it can be engineered to open automatically once a fire has been detected.

Therma-vent Control System

Up to four AOV's can be operated by the Therma-vent Control System Panel when used as part of a smoke ventilation system. Available accessories include the Therma-vent Break Glass Switch, Fireman's Key Switch and Optical Smoke Detector with red LED status indication and mounting socket.

The Therma-vent control system has a break glass panel with LED status indicators, reset, open and close buttons. From the LED status any failures are clearly visible, such as faults in the wiring or the system itself. Updates are instant, revealing the vent position and system activation.

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When the Therma-vent control system is used in conjunction with an AOV, the priority control will react promptly to signals, prioritising their importance - from Fireman's Switch, manual control points and smoke detectors.

A key is supplied to remove the break glass, which facilitates operation of the reset / open / close buttons to operate the AOV, which allows for natural ventilation.

Stand Alone System

Please Note - 140 degree option shown

The Therma-vent control panel can be quickly and easily installed. Internal wiring is already completed and tested, and batteries are fitted, minimising room for wiring error.

The Therma-vent Control panel can be installed to operate in two ways:

  • A simple centralised 'stand alone' system - whereby the fire service instructs and controls the functioning of the Therma-vent control panel.
  • A larger decentralised / 'networked' system with additional Therma-vent control panels - you can install the system to function on the instruction of a fire signal from a manual control point mounted within the fire zone, or a smoke detector.
  • A centralised 'stand alone' Therma-vent Smoke Ventilation system is pictured above. This particular system has been installed in an escape route staircase. Manual control points activate the OV.
    NB: 140 degree option shown.

    Stand Alone System

    By networking a Therma-vent system cabling distances are reduced. A Therma-vent Control Panel is installed in every fire zone in the building, each panel controlling a zone with up to four AOV's. Fireman's Switch control points are used to link all control panels to the central control zone.

    The centrally mounted Fireman's Switch can override manual control points and zones activated by smoke detectors.

    The Therma-vent Control Panel can also be installed within a bigger system, one that receives signals from a BMS through it's 'no voltage' monitoring capacity. The networking Therma-vent Smoke Ventilation system is to be installed in smoke shafts, living accommodation and escape route staircases. The Fireman's Switch facilitates central control. Manual control points and smoke detectors trigger the AOV.

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