Freguently asked questions

Electrical products

What are the main benefits of electrical operation?

Through VELUX electrical operation you can obtain comfortable and flexible operation of your roof windows, decoration and sunscreening products, and frame lights from anywhere in the house.

You also have the luxury to relax in case of rain thanks to the rain sensor, and check the status of your roof windows at any time via the status display of the remote control.

Once you have familiarised yourself with the basic functions of your electrical windows, you can try the range of smart functions.

You can choose to personalise each window or group of windows using the timer function, the naming function, or the program function. For example, you can ask your windows to open and your shutters to rise with a time delay, and then use the program key to start the whole sequence. Making life easier for you.

How do I install VELUX electrical products?

Thanks to the new wireless technology VELUX electrical products are registered automatically once the installation has been carried out.

The remote control automatically identifies the electrical products once they have been plugged in – no need for linking of products with cables, changing settings, etc.

All VELUX instructions provide detailed information about the installation of the products.

I already have a VELUX roof window and would like to obtain all the benefits of the INTEGRA roof window, what should I buy?

You should choose the electrical conversion kit KMX giving you all the same functions as the INTEGRA roof window.

The kit is available for pivot-hung windows (KMX 100) and for top hung windows (KMX 200).

What types of products come with a rain sensor?

All VELUX window operators come with a rain sensor as standard to ensure that your electrical roof windows automatically close when it rains.

Window operators are included in the following products:
The electric roof window GGL/GGU INTEGRA, electrical conversion kits KMX 100 and KMX 200, and window operator KMG 100.

Are VELUX io-homecontrol labelled products compatible with former generations of VELUX electrical products?

No, VELUX electrical products sold before 1 May 2006 are based on infrared technology, whereas new VELUX electrical products are based on a wireless technological standard denoted io-homecontrol®.

VELUX electrical blinds, awning blinds and roller shutters are, however, compatible with both the old and new technology, i.e. these can be used together with both new and old generations of VELUX electrical products.

How do I maintain the window GGL/GGU INTEGRA?

GGL/GGU INTEGRA is maintained just like a manual roof window.



For further information, please see the enclosed instruction guide for the window.



The window operator is maintenance free.

I am about to buy a VELUX roof window, how do I choose the right electrical products?

The best choice is the electrical roof window GGL/GGU INTEGRA® with a rain sensor, a wireless remote control with display, and the possibility to add electrical decoration and sunscreening products and frame lights.

In addition you get a range of other smart functions that make life easier and more comfortable for home owners.

How many electrical products can be controlled by a VELUX remote control with display?

A VELUX remote control with display can operate up to 200 products in total.

Products can be controlled individually or all at once from anywhere in the house.

I only need a single electrical function, e.g. an electrical blind, what should I buy?

The single function control system KUX 100 is recommended for simple operation of a single electrical product, e.g. an electrical blind.

Can I add an electrical blind or shutter to my INTEGRA window or the electrical conversion kit at a later occasion?

Yes, all VELUX electrical blinds and shutters are prepared for easy fitting on the INTEGRA window.

Your original remote control will automatically register the new additions and add them to the overall menu in a few seconds. Once the additions have been made, you can start using them.

Can I install more than one electric roof window at a time?

Yes, all electric roof windows are installed like manual roof windows.

After the installation has been carried out, you can register all windows in one remote control, or each window in individual remote controls.

Install

Is installation of VELUX roof windows possible at any roof pitch?

Yes, installation of VELUX roof windows is possible for roof pitches between 15° and 55°, or up to 65°-90° (depending on type of roof window) with the use of special springs.

Can I operate a VELUX roof window electrically?

Yes. VELUX has introduced the first complete electrical all-in-one roof window – INTEGRA. The window comes with a complete electrical system for easy and fast installation.
If you already have the roof window installed, you can still install the necessary components (window opener, control unit, infrared receiver) to have you window electrically operated. 

Go to VELUX Integra
Go to Electrical Operation

Can I install a VELUX roller shutter myself?

No. A VELUX roller shutter is a product which we recommend is installed by a professional installer or by VELUX Service .
Go to Installation of accessories and other products 
(LINK TO ADIVCE AND TOOL/INSTALLATION)
Go to Installer Locator

Does the VELUX lining fit with older generations of roof windows?

Yes, all VELUX roof windows with a control bar - except window sizes 102, 104, 206, and 5.

Can I install a VELUX roof window myself?

No. A VELUX roof window is a product which we recommend is installed by a professional installer. Working with roof construction is a job for a skilled carpenter, not a do-it-yourself job. 
Go to Installer Locator

Is installation the same regardless of the roofing material?

No, you have to be aware of the different kinds of roof materials.

Can I install a VELUX blind myself?

Yes. VELUX blinds are all designed to fit VELUX roof windows and can be installed in a matter of few minutes. The pre-fitted installation brackets in your window will help in this situation.
You can also choose to let VELUX Service help you install your blinds during a service visit. This is done at a fixed price regardless of where you live.
Go to online Blinds Shop (LINK TO ONLINE SHOP)
Go to Installation Guides for VELUX Blinds (LINK TO BLINDS INSTALLATION)
Go to Installation of accessories and other products (LINK TO ACCESSORIES INSTALLATION)

How do I measure my roof pitch?

The most accurate method is by using a pitch-gauge placed on the roof itself. This gives an accurate reading of the degree of roof slope (a pitch-gauge can be purchased at local building supply stores). The alternative is to measure the rise over the run.

Smoke ventilation

What is the EN 12101-2 standard?

• 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.

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

• 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 requirement 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 directions

• 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

Does the EN 12101-2 standard cover sloped roofs?

• The standard lays out requirements for natural smoke and heat exhaust ventilators independent of whether they are placed in sloped or flat roofs.
• It also covers smoke ventilation for facades

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

• 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

Where is the proof for compliance with EN 12101-2 found?

• 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

What should be ordered to have a certified system for natural smoke and heat exhaust ventilation?

• A VELUX smoke ventilation window including wind deflector which should be used when there are requirements for an aerodynamic free area
  OR:
• A VELUX smoke ventilation window (excluding wind deflector), which should be used when there are requirements for a geometric area of ventilation
  AND:
  
  A VELUX control system package for simultaneous operation of up to two smoke ventilation windows

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

• 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 or white polyurethane finish

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

• 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
• 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

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

• 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, 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.

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

• A VELUX control system package (KFX 004) can be used to operate up to 2 smoke ventilation windows, giving a possibility to create a smoke geometric area of more than 3 m2 or an aerodynamic free area of 1,72 m²

Does the smoke ventilation system protect against power failure?

• 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

How is a VELUX smoke ventilation window installed?

• The VELUX smoke ventilation window is installed in roofs with pitches between 0 and 60°
• 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

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

In case of defect, the VELUX smoke ventilation operators can be replaced.

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

• Yes: The VELUX smoke ventilation system can be controlled by an external alarm system
• A module for connection to external alarm systems is delivered with the all-inclusive control system package (KFX 004)

Does VELUX offer services related to smoke ventilation?

• VELUX also provides assistance with system installation, commissioning and annual servicing (adapt to local offerings)

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

• 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

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

• 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

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

• 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.

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

• A VELUX smoke ventilation window excluding wind deflector is used when legal requirements for smoke ventilation address only the geometric area

Can VELUX smoke ventilation windows be used in flat roofs?

• 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