View of a garden through a Sunvista glass door       View of a garden through a typical glass door

Typical 4500mm x 2500mm opening of the same garden vision
Sunvista with its 19mm interlocking sections versus a typical sized bi-folding door screen
Sunvista allows up to 20% more daylight than typical bi-fold doors
Sunvista is clearly the obvious choice.

Interlocking frame size
Sunvista 19mm (¾”) wide interlocking profile.

Not a simulation, this is the Sunvista system as seen in a real life setting.