Many consumers choose the door closer mostly from the function. Another factor that can determine consumers' purchase is the appearance of the door closer. High priced door closers are also common in the market. They are widely used in commercial real estate and other projects, such as office doors, conference rooms, etc. Generally, there are three common top mounted door closers.
Conventional arm: the conventional arm or standard arm is closer to the pull side application, which means it is located outside the door. In these applications, there are two arms, one connected to the frame and the other connected to the spring loaded box on the pull side of the door. When closed, the arm protrudes vertically from the door, which is less attractive than other applications, but it is the most power saving option.
Top Jamb: The top door frame door closer, like the regular door closer, has handrails extending vertically from the door. However, the biggest difference is that the spring box is installed on the surface of the door frame. These are usually used for aluminum or glass shop facing doors, as these doors usually have narrow top rails. Like an ordinary door closer, the top closed door closer is very energy-saving.
Parallel arm: It is applied through parallel arm. When the door is closed, two arms are located at the top of the door. They are fixed to the door by a spring loaded box, which is located at the top of the push side of the door and provides power for the closing action. Parallel arm door closers are one of the most common applications, especially in commercial real estate and schools, because they reduce the risk of intentional damage to the arm, and they are more attractive than other spending options. Due to the geometry of the arms, these are less power efficient than ordinary arms and top door frame closers.