VELUX flat roof windows - Dome

VELUX fixed flat roof window

VELUX fixed (not opening) flat roof window is ideal where there is a need for bringing in large amounts of daylight.

CVP

VELUX vented flat roof windows

The VELUX vented flat roof window provides ventilation and fresh air through the roof. Available with manual or electrical operation.
CXP

VELUX access flat roof window

The VELUX flat roof access window can be opened manually to an angle of 60° to allow easy roof access.
CSP

VELUX Smoke ventilation

Smoke ventilation is often required by law in industrial buildings and offices - above staircases for instance.

It's amazing what adding a VELUX flat roof window can do for your home

Many living spaces in flat roof buildings - including kitchens, living rooms, and offices - get very little natural light. With a VELUX flat roof window, you can transform and improve virtually any space with daylight.

Imagine what a VELUX flat roof window can do for your home: Add natural light, increase fresh air and provide a fresh look to your interior. Available in open or fixed versions. Both can be used for new installations or as replacements for existing dome products.
Maintenance Free

Low maintenance

The flat roof window is maintenance-free as the kerb is made of wear-resistant PVC and the dome is made of a durable acrylic or polycarbonate material.

Great energy-efficiency

VELUX high-performance insulation is integrated into the frame and sash to give the best possible protection against heat loss. This, combined with our optimized protection against thermal bridges, delivers a warmer, more comfortable home.
Ready to Install

Easy to install

A professional installer can install VELUX flat roof windows quickly and easily. You can find a list of installers or locate a dealer in your local area by clicking Find Installers or Find dealers.

VELUX fixed flat roof window

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Fixed flat roof windows

VELUX fixed flat roof window

With a fixed (not opening) flat roof window, you can transform and improve any space. VELUX flat roof windows CFP add the daylight you are looking for to rooms with very little natural light.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 nine sizes.

Technical Details

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.
Technical Details

Watch the operation

Ventilate your room automatically

VELUX INTEGRA® flat roof windows come with a handy touchscreen control pad for easy and intuitive remote control of windows and blinds. The windows can even be programmed for regular opening, providing automatic ventilation and fresh air.

Manual operation with control rod

VELUX flat roof window with manual control includes a rod for operating the window. The rod offers direct control via a turn-handle that opens and closes the window. Manually controlled roof windows are recommended for installation no higher than 3,5 meters above floor level. It is not possible to fit blinds on this model.

More comfort with VELUX INTEGRA®

Imagine your roof windows automatically letting in fresh air when you need it. Your blinds automatically lowering on a hot afternoon to keep your home comfortable. When leaving, you could close all your roof windows with a single touch. This, and much more, is possible with the VELUX INTEGRA® system, which is available at prices that may surprise you.

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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.

Watch the operation

  • 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 

Technical Details

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

  • EN 12101-2 is a European product standard with the title “specification for natural smoke and heat exhaust ventilators”
  • Since 1. September 2006, all natural smoke and heat exhaust ventilators must be CE marked according to the European product standard EN 12101-2.
  • EN 12101-10 is a European product standard with the title: “Smoke and heat control systems – Power supplies”
  • All VELUX power supplies for smoke ventilation are in compliance with EN 12101-10.
  • The natural smoke and heat exhaust ventilator should be classified in regards to:
    1. Reliability: A requirement for the number of cycles the ventilator can operate safely
    2. Snow load: A requirement for the maximum snow load to ensure full function
    3. Low temperature: A requirement for the minimum room temperature to ensure function
    4. Wind load: A rzequirement for the maximum wind suction that the ventilator can withstand without compromising the function
    5. Heat exposure: A requirement for the temperature, under which the ventilator will maintain its function during 30 minutes of heat exposure
    6. Aerodynamic free area: A requirement for efficiency of the ventilator for all wind direction
    7. The certification tests must be carried out by a certified test institute
  • Window and smoke ventilation operator must be tested and certified as one unit
  • The certification must be made by a notified certification agency 
  • The natural smoke and heat exhaust ventilator must be CE marked and the certification values must be displayed at the product
  • The standard lays out requirements for natural smoke and heat exhaust ventilators independent of whether they are placed in sloped or flat roofs.
  • VELUX smoke ventilation windows are CE marked and have been tested in regards to the parameters of EN 12101-2 
  • All VELUX smoke ventilation products are updated in accordance with the harmonized standards in the EN 12101 series regarding smoke and heat control as soon as the standards come into force
  • A product for natural smoke and heat ventilation cannot be CE-marked if it has not been classified in compliance with the EN 12101-2 product standard
  • A declaration of conformity is delivered with VELUX smoke ventilation windows which includes the certification values
  • A VELUX smoke ventilation window including wind deflector should be used when there are requirements for an aerodynamic free area

OR:

  • A VELUX smoke ventilation window (excluding wind deflector), should be used when there are requirements for a geometric area of ventilation

AND:

  • A VELUX control system for simultaneous operation of up to four smoke ventilation windows or linked with more VELUX control units KFC 210/220
  • Or any control system for smoke ventilation that is applicable and approved for use with VELUX GGL/GGU smoke ventilation windows
  • VELUX smoke ventilation windows are delivered in several VELUX standard sizes enabling correct specification for a variety of applications (adapt to local offerings)
  • A choice can be made between pinewood finish and white polyurethane finish
  • The centre-pivot symmetry at a 90° opening angle makes the effectiveness more even, meaning that the centre-pivot roof window allows for an effective smoke and heat exhaust independent of the wind direction. This means that a wind sensor is not necessary and that only one VELUX smoke ventilation window often is enough to meet the demand.
  • According to the EN 12101-2 product standard, the effectiveness of the natural smoke and heat exhaust ventilator must be measured under wind exposure from different angles
  • Yes: VELUX smoke ventilation windows have passed the requirements of the reliability test in the EN 12101-2 standard, which requires that the window can operate more than 10.000 cycles
  • For comfort ventilation, the window opens up to max. 200 mm (recommended) , making it compliant also to the safety standard EN 60335-2-103
  • The characteristics of the centre-pivot window in relation to comfort are favourable since the sash in a comfort-opened window protects against rain, falling leaves etc.
  • A VELUX control system (KFX 210) can be used to operate up to 4 smoke ventilation windows, giving a possibility to create a smoke geometric area of 6-5 m2 or an aerodynamic free area of almost 3 m2.
  • More control units (KFC 210/220) can be linked to operate up to 80 VELUX smoke ventilation windows, if required.
  • An integrated battery back-up in the control system means that the system will still respond for 72 hours in the event of power failure
  • The VELUX smoke ventilation window is installed in roofs with pitches between 15-90°. For roof pitches between 60-90° special requirements may apply. Please check your local requirements.
  • For a quick and easy installation, the compact smoke ventilation operator has been pre-mounted on the sash of the roof window, making it invisible when the window is closed
  • Two discrete gas springs are easily mounted on the window to enable a stable and fast opening
  • A wind deflector is installed depending on the application
  • In case of defect, the VELUX smoke ventilation operators can be replaced.
  • Yes: The VELUX smoke ventilation system can be controlled by an external alarm system
  • A module for connection to external alarm systems is included in the control units KFC 210/220
  • VELUX also provides assistance with system installation, commissioning and annual servicing (adapt to local offerings)
  • The VELUX smoke ventilation system is a very flexible and cost efficient solution suited for a variety of applications, ranging from staircases in apartment buildings to large commercial buildings
  • VELUX smoke ventilation solutions are effective in all roof window applications, providing great flexibility in positioning the window on the roof
  • Information on the performance must be indicated on the products itself and on the accompanying CE declaration or certificate for compliance
  • The CE marking ensures that the performance can easily be compared
  • Compliance with EN 12101-2 can be obtained only when the products are labelled with a reference to the standard, and the version of the standard used for certification is written on the product
  • Wind deflectors should be used when legal requirements for smoke ventilation address the aerodynamic free area. This may depend on the application and the local legislation.
  • A VELUX smoke ventilation window excluding wind deflector is used when legal requirements for smoke ventilation address only the geometric area
  • The smoke ventilation windows can be installed in roofs with pitches between 15 and 90°.
  • In flat roofs 0-15°, the windows are installed using a VELUX ECX flat roof curb or a VELUX CSP flatroof smoke ventilation window is used.

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.

Technical Detalis

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.

Accessories

Complete your flat roof window with a VELUX blind. VELUX blinds offer effective sun screening and heat protection to suit every need. Choose among exterior awning blinds or a range of interior blinds - with electrical or solar powered operation.
Burglary Resistance

Awning blinds for
dome flat roof window

• Effective heat protection 
• Solar powered 
• Easy installation

Installed between the window and the dome, transparent awning blinds keep temperatures comfortable by filtering the strong rays of the sun before they heat up your window pane. These solar-powered screens are operated by remote control and are io-homecontrol® compatible. VELUX awning blinds for flat roof windows are simple to install.

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Pleated blinds for flat roof window

• Softly diffuses daylight
• Decorative
• Convenient remote control operation

Perfect for softening incoming daylight and adding a decorative touch, pleated blinds are easy to open and close with our handy remote control. They are io-homecontrol® compatible and come in three colours.

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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.