Size
Min./max. sizes and calculation of free opening rules
Here you find the min./max. sizes for the sidehung window.
To calculate the free opening, please use the formulas below.

Min./max. sizes, 24mm glazing

Calculation of free opening, 1-leaf

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Here you find the min./max. sizes for the sidehung window.
To calculate the free opening, please use the formulas below.




Supplied with child-lock button.
New thermal material which is warm to the touch.
Brush/satin surface finish.
Watch Video How to operate a handle with child-lock

Supplied with lock and key for extra security.
New thermal material which is warm to the touch.
Brush/satin surface finish.
Please watch the videoHow to operate an espagnolette handle with small key

Allows an 180⁰ opening of the casement door.
Not available in combination with friction arm or glass-separating glazing bars.
Will influence the glass weight restrictions of the casement door.
Grey, corrosion-proof zinc-aluminium surface finish.

Warm, non-slip surface makes life easier for those with an infirm grip.
Supplied separately.
Suitable for all types of VELFAC 200 espagnolettes.

Natural anodized surface finish.
Not visible from outside.
Click vents will always be positioned in the jamb where possible.
Free opening of 4000mm² in VELFAC 200 DGU windows.
Documentation on airflow can be supplied for specific projects.
Watch the video How to operate the VELFAC click vent

Efficient glazing is fundamental to noise control, and fresh air is essential to our wellbeing.
The new acoustic vent is designed to provide both fresh air and noise control in buildings when combined with VELFAC SOUND windows.
The vent achieves a sound reduction value of Dn,e,w (C; Ctr) = 40 (-1; -2) dB.
The acoustic vent is machined into a timber packer, which will be installed and sealed on site.
The external aluminium profile is polyester-powder coated in the same colour as the window sashes, allowing an elegant integration with windows and facade.
The acoustic vent, which is visible from inside, comes in RAL 9010.