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The UK's Leading Supplier of Rooflights
Thermadome Ventilation Options

Thermadome Rooflight Ventilation

Fresh air is as important in any space as natural daylight and to ensure the finished room gets the right amount Thermadome rooflights come with a range of ventilation options to suit every requirement.

Thermadome Ventilated RooflightsControllable Rotating
Controllable rotating ventilation units are fully insulated, resulting in superior thermal properties, and offer a greater ventilation area than the Trickle Vent options. The vents can be fitted to two or four sides of an upstand. The two-sided units will provide a minimum ventilation area of 11,000mm2 and this improves with the size of the rooflight. The units are tested and certified according to EN 1873: Watertightness.

Thermadome rooflights, upstands, hinged opening frames and rotating ventilators, are all certified as providing adequate resistance to precipitation, according to EN 1873: Weathertightness.

Thermadome Ventilated RooflightsPermanent Trickle
Permanent trickle ventilation provides a continuous 5 to 10mm weatherproof vent around the edge of the rooflight which is perfect in areas, like corridors, where non-controllable background ventilation is needed.

Controllable Trickle
Controllable trickle ventilation is provided by an adjustable vent which is fitted to either two or four sides of the upstands. The two-sided unit provides a ventilation area of around 8000mm2 which helps compliance with Building Regulations.


Hinged Opening Rooflights

Hinged opening vents are designed to allow rapid air movement in a room and provide the maximum ventilation area. Thermadome rooflights can be supplied with manual or electric opening hinged vents.


Thermadome Hinged RooflightsHinged Electric Actuator Opening
The electric actuator operation can be opened to 400 or 600mm and is controlled by a wall-mounted switch. A control panel which offers additional options for wind, rain and temperature sensors is available separately. Actuators are either 24V DC or 230V AC.

Manual Hinged Spindle Opening
The manual spindle operation can be opened up to 300mm and is operated by a portable winding rod. The hinge manual spindle opening vent is tested and certified according to EN 1873: Watertightness.

Powered extractor fan ventilation
Thermadome Extractor Fan Where extra natural ventilation is needed in a space Thermadome rooflights can be supplied with Vent Axia Solo or Centrif Duo centrifugal extract fans. They come mounted in the side wall of the upstands.

These high performance extract fans are specifically designed for ventilating internal bathrooms, WCs and other small rooms. They have an extract performance of 85 m3 /hr (24 l/s) or 220 m3/hr (61/s) respectively and can be fitted in one or more sides. Where greater air movement is required, white PVC lined fan collars with pre-cut apertures are available to enable fitting of larger axial fans (e.g. Vent-Avia T-series). This allows either new high capacity fans to be installed or existing fans to be reinstalled through the rooflight unit.


If you would like assistance at any time about any of the rooflights or would like further details of our range, then please do not hesitate to contact us on 01276 451555, e-mail us at or use this e-mail form to contact us.