VELUX fixed flat roof window

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Fixed flat roof windows

VELUX vented flat roof windows

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VELUX vented flat roof windows

VELUX vented flat roof windows

VELUX vented flat roof window combines daylight with fresh air. It lets you ventilate when needed and is perfect for offices, clinics, workshops and other environments where daylight and fresh air are required.

VELUX vented flat roof window is available with electrical or manual operation.

The double-glazed units has a laminated inner pane for additional safety. The clear or opaque dome is designed to protect the double-glazed unit below from rain and snow.

Available in nine sizes.

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Smoke ventilation for flat roof

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Smoke ventilation for flat roof

VELUX smoke ventilation for flat roof

VELUX roof windows with smoke and heat ventilation* are perfect for buildings that need to meet safety requirements while providing comfort for the users of the building. In the event of a fire, the window automatically opens to let smoke and other harmful gasses out of the building. 

The windows can also be opened and used to provide natural ventilation to the building as needed. 

Smoke and heat ventilation windows are typically used in common access areas such as stairwells and annex connections as well as in industrial buildings and offices.

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  • Opens 50 cm within 60 seconds

  • Unobstructed view with integrated motor 

  • Appears as standard VELUX flat-roof windows inside and outside 

  • Comfort ventilation possible at the touch of a button. Rain sensor available


Flat-roof smoke-ventilation roof window

Window type:  Product code:  Explanation:  EN certified: 
CSP  1073Q Double glazing with dome  EN 12101-2 

Control system overview -
what they do and where they fit

Control system KFX 210

Complete control system
for up to 4 GGL/GGU
smoke-ventilation roof
windows or 1 CSP
flat-roof window.
Includes: KFC 210 +
KFK 100 + KFA 100

    Control unit KFC 210
  • 10 amp.
  • Controls up to 4 GGL/
    GGU smoke-ventilation
    roof windows or 1 CSP
    flat-roof window for
    smoke ventilation.
    Control unit KFC 220
  • 2 x 10 amp.
  • Controls up to 8 GGL/
    GGU smoke-ventilation
    roof windows or 2 CSP
    flat-roof windows for
    smoke ventilation.
    Break-glass point KFK 100 
  • Break-glass point
    for activating
    smoke ventilation
    function.
    Comfort switch KFK 200 
  • Wall switch
    enabling natural
    ventilation for
    daily comfort.
     Smoke detector KFA 100 
  • Smoke detector
    for early fire
    detection.
     Rain sensor KLA 200
  • Closes window in
    comfort ventilation
    mode in case of rain.
  • Overruled in the event of fire.

Applicable wherever smoke ventilation is required.

        Passageways

        Offices and public buildings

        Factories and warehouses

Frequently asked questions (FAQ)

Smoke-ventilation flat-roof windows

What is the EN 12101-2 standard?

What is the EN 12101-10 standard?

How is a product CE-marked in accordance with the EN 12101-2 standard?

Does the EN 12101-2 standard cover sloped roofs?

Do VELUX smoke ventilation products live up to the newest EN product standards?

Where is the proof for compliance with EN 12101-2 found?
Using VELUX roof windows, what should be ordered to have a certified system for natural smoke and heat exhaust ventilation?

Are VELUX smoke ventilation windows available in different sizes and variants?

Why does VELUX use a centre pivot window that opens 90 degrees?

Is it possible to use the smoke ventilation system for comfort ventilation?

What is the maximum ventilation area, which can be obtained?

Does the smoke ventilation system protect against power failure?

How is a VELUX smoke ventilation window installed?

Is it possible to replace previously installed VELUX smoke ventilation operators?

Is it possible to connect the VELUX system to external alarm systems?

Does VELUX offer services related to smoke ventilation?

For which applications can a VELUX smoke ventilation system be used?

How can the performance of different smoke and heat exhaust ventilators be compared?

When should a smoke ventilation window including wind deflector be installed?

When should a smoke ventilation window excluding wind deflector be installed?

Can VELUX smoke ventilation windows be used in flat roofs?

VELUX access flat roof window

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VELUX access flat roof window

VELUX access flat roof window

Unlike most roof access windows, the VELUX flat roof access window CXP is just as pleasing to the eye as our other flat roof windows and can therefore easily be combined with a group of VELUX flat roof windows CFP/CVP. It can be opened manually to a 60° angle to allow easy access to the roof.

The double-glazed unit has a laminated inner pane for additional safety. The clear or opaque dome is designed to protect the double-glazed unit below from rain and snow.


Available in three sizes.

Watch the operation

Excellent rain noise reduction

All VELUX flat roof windows provide excellent rain noise reduction. The special structure of the dome deflects the noise, while the combination of an exterior dome, double-glazed low-energy pane and insulated kerb reduces noise considerably. Together, they provide protection from rain and hail noise as well as aircraft and traffic noise, and other disturbances.

Much more than just a window

Flat roof windows can dramatically change a room. They’re the fastest way to add natural light, ventilation and the feeling of openness to your under roof spaces. The impact in terms of daylight and fresh air is stunning.