Lobby Vent Kits

  1. Automatic Opening Vent Kits >
  2. Lobby Vent Kits
Lobby ventilators are used to extract any smoke leaking into a common lobby to protect the escape stairs and the buildings' means of escape.

Lobby Vent AOV Kits

A lobby vent or lobby AOV system is an automatic opening ventilator (AOV) that provides at least 1.5m² geometric free area when open. The installation is located at high level in the corridor or lobby that connects to the communal escape stairwell.

The lobby ventilator usually serves one of two purposes; removing any smoke that gets in the corridor or lobby of small buildings or more commonly, it provides replacement air for a lobby smoke extract system in large buildings.

If a fire breaks out, resulting in smoke getting into communal lobbies or corridors adjoining the escape stairwell, there needs to be some means of removing smoke from these areas to prevent contamination of the escape stairwell.

Compliance with Building Regulations

When it comes to lobby ventilation, paragraphs 3.49 of Approved Document B of the Building Regulations 2019 details the requirements for smoke vents for common escape routes:

Except in buildings that comply with Diagram 3.9, the corridor or lobby next to each stair should have a smoke vent. The location of the vent should comply with both of the following:

  1. Be as high as practicable.
  2. Be positioned so the top edge is at least as high as the top of the door to the stair.

They should be located on an external wall with minimum free area of 1.5m².

A vent to the outside with a minimum free area of 1m² should be provided from the top storey of the stair.

In single stair buildings, smoke vents on the storey where the fire is initiated, and the vent at the head of the stair, should be activated by smoke detectors in the common parts.

In buildings with more than one stair, smoke vents may be activated manually. The control system should open the vent at the head of the stair before, or at the same time as, the vent on the storey where the fire is located. Smoke detection is not required for ventilation purposes in this instance.

In practice, it is customary to provide a manual switch for fire and rescue service use at the access level within the stairwell for all stairwell smoke vents.  Smoke vents must comply with BS EN 12101-2:2017 – Smoke and heat control systems. Natural smoke and heat exhaust ventilators; and be CE/CA marked.

Lobby ventilator control requirements

Lobby vents must be provided with a standby power source, CE marked to BS EN 12101-10:2005 – Smoke and heat control systems. Power supplies. This will usually take the form of a battery backup supply housed within a control unit. Additionally, control panels should be certified to ISO 21927-9:2012 – Smoke and heat control systems. Specification for control equipment.

Note that the stairwell vent should be activated automatically when a lobby ventilator is opened so controls will be networked.

The EV-301 control panel that features in the AOV kit range meets all of the above standards and is designed to be networked to give the correct control sequence. There are many additional features that can be added to the panel including thermostatic control and wind and rain-sensing control for summer ventilation.

Lobby vent AOV Kit options

There are several models available within the AOV kit range that are suitable for lobby ventilation including glazed units for internal daylighting and aluminium vents for thermal insulation.  We do not recommend single skin aluminium ventilators as these are likely to result in condensation inside the building.

AOV Kit D includes the following equipment:

  • 1 x 1.5m² geometric free area Louvre Window
  • 1 x Modular Control Unit
  • 1 x Firemans Override Switch
  • 1 x Photoelectric Smoke Detector
What AOV Kit D does
Provides smoke clearance to a protected corridor or lobby by automatically opening upon actuation of the control panel.
When AOV Kit D is suitable
Where an automatically opening vent is required to provide a minimum free area of 1.5m² as specified in Approved Document B of the Building Regulations.
AOV Kit D System specification
This smoke control kit will provide a window to meet the requirements of ADB of the Building Regulations. It features a louvred window, a control panel with battery back-up and a manual override switch.

AOV Kit I includes the following equipment:

  • 1 x 1.5m² Casement Window
  • 1 x Modular Control Panel
  • 1 x Smoke Detector
  • 1 x Fireman’s Override Switch
What AOV Kit I does
Provides smoke clearance to a protected corridor or lobby by automatically opening upon actuation of the control panel.
When AOV Kit I is suitable
Where an automatically opening vent is required to provide a minimum free area of 1.5m² as specified in Approved Document B of the Building Regulations.
AOV Kit I System specification
This smoke control kit meets the requirements of ADB of the Building Regulations. It features a Casement Window, a control panel with battery back-up, a manual switch for location at highest and lowest storeys within the stairwell, and a smoke detector.

View alternative AOV Kits

Resize Font
Contrast Mode
0
    0
    Your Basket
    Your basket is emptyReturn to Shop