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Wall Opensky

The Wall Opensky is an attractive economical low profile wall mounted louvred ventilator.It has been specifically designed for both smoke and heat exhaust and natural ventilation applications and can m=be manually or automatically operated.


Wall Opensky is suitable for installation into any wall or glazed construction. It can be fixed directly into the wall fabric or supplied with wither of the following optional extras.

  • Glazing Adapters – To seamlessly fit into glazing systems.
  • Rear Fixing Flange – For mounting external onto the wall.
  • Front Fixing Flange – For mounting the vent flush with the wall.

Closure flashings can also be provided allowing for a neat finish to wall openings.

Louvre Blade U-Values

The wall Opensky can be supplied with insulated louvre blades to assist in ensuring the building is adequately insulated.

The comparative values for the available louvre blades options are as follows:

Louvre SpecificationU-Value
Single Skin Aluminium (1.5mm)6
Insulated Blades (25mm PIR)0.66
Polycarbonate Blades
(2mm Translucent)

Translucent polycarbonate louvre blades provide excellent daylighting using a durable UV stabilised material. When closed it can provide an average diffused light transmission in excess of 80%, enabling saving on sarifical lighting. Pile weather seals are also fitted to the louvre blade edges and sides to minimise heat loss.

Control options

The following control options are tested to the below standards.

Control OptionsTested To
24v Electric Drive Open / Drive CloseEN-12101
Electric 230v Drive Open / Drive CloseBS-7346
Electric 24v and 230v Spring ReturnBS-7346
Pneumatic Air to OpenEN-12101
Pneumatic Air to CloseEN-12101


The Wall Opensky has been tested to BS EN 12101 – Part 2: 2003: Specification for natural and heat exhaust ventilators. When closed the ventilator is weatherproof and is tested to BS 5368 Parts 1 and 2.

Temp (Low)T (-5°C)
Temp (High)B-300

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