Tilt window

1. The space on the frame (frame)

2. The sash height (height of the window)

3. The sash width (width of the window)

Hinged window

1. The space on the frame (frame)

2. Sash height (height of the window)

3. The sash width (width of the window)

4. The depth of the window reveal (This is how "deep" the window is installed)

Roof window

1. The width of the window

2. The effective! Sash height

This is where you need to pay attention. Skylights are often pivoting windows. That is, the axis of rotation is in the middle. For the drive selection is always important the dimension from the axis of rotation to the drive.

The axis of rotation is approximately in the middle for pivoting windows, and at the top for top hung windows.

3. The space on the frame

If there is not enough space here, you can often use a sheet or substructure to widen this area a little. Perhaps you know the substructure and it is stable enough to hold the drive securely, then you may be able to mount the drive on the cladding (plasterboard).