Just measure the total visible Glass
On a glass Size over 750mm, you will have split panels that sit side by side.
We will always supply the minimum number of panels required for the total space.
E.g…
Glass Size 750mm = 1 Panel -
Glass Size 750-1500mm = 2 Panels
Glass Size 1501- 2250 = 3 Panels
The louvers for each panel will operate independently.