Folding garage door with 4 operable panels
Folding garage door with 4 operable panels and an opener or automatic garage doors are divided into several categories:
Hinged openers with 2 operable panels: these are openers installed on the door with two operable panels. They are the most popular in Iran.
Hinged openers with 1 operable panel: they are similar to hinged openers with 2 operable panels in which an operable panel with higher length opens and closes.
Railing door motor: such openers are used for railing or sliding doors.
Folding garage doors with 4 operable panels and a chain opener
In this model, a chain moves the door up and down. The chain model is the cheapest among different types of garage door openers.
It makes a lot of noise because of the chain so it is not a good choice for people who hate noise.
In general, the chain model has such features: cheap with a lot of noise.