Which door type features glass pieces from top to bottom?

The French door is characterized by its design, which typically includes extensive glass panels that run from the top to the bottom of the door. This design allows for natural light to filter through while providing a view into the adjoining spaces, whether it's a garden, patio, or another room.

French doors are often used to connect indoor and outdoor areas, enhancing the aesthetic appeal of a space with their elegant appearance. The presence of glass pieces in the full height of the door creates an inviting and open atmosphere, making them a popular choice in residential architecture.

In contrast, the other door types mentioned do not offer the same level of glass integration. Bi-Fold doors, while they do have glass panels, are designed to fold out of the way, typically consisting of multiple panels that treks aside rather than presenting a continuous glass surface. Louver doors have slatted openings that allow for ventilation and light, but they lack the full glass panel feature. Flush doors are typically solid and unadorned, often used in interior applications, providing minimal to no visual connection with the outside or adjoining spaces.