A door closer is a device that automatically closes a door to prevent it from staying open, slamming shut, or opening too far. It can be manual or automatic and is commonly found in public buildings. Manual door closers use spring resistance, while automatic ones can open and close via remote access or motion sensors. Door closers can be surface-mounted or concealed and provide benefits such as reducing wear and tear on doors, preventing injuries, and maintaining a constant temperature in a room.
A door closer is an automated device that closes a door after it has been opened. The device is attached to both the door and the door frame and can be manual or automatic. Prevents the door from staying open, slamming shut or opening to slam against the wall or door frame in strong winds. The most common examples are usually found in schools, grocery stores, and a multitude of other small businesses and public buildings.
Manual door closers create resistance as the door opens by using the force exerted to compress a spring. As the pressure builds, the spring releases to close the door. The closing speed of the door is controlled by the release of pressure in one chamber. A hydraulic chamber releases the oil, while a pneumatic closer uses air to provide spring resistance.
Some automatic door closers are capable of automatically opening a door via remote access control or through the use of motion sensors. The automatic door closer is more commonly known as a door opener due to its combined ability to close and open a door. This device is usually activated by activating a motion sensor, stepping on a sensor plate, or pressing a button. Many large stores, fast food chains, and commercial businesses make use of this type of door closer to accommodate heavy consumer traffic and to allow convenient access for the handicapped.
The two main types of door closers can be further classified based on variations in appearance and placement. A surface mount door closer is often attached to the top of a door, above the hinges and in the corner. Residential screens and security doors often place the door closest to half the length of the door. Concealed door closers can be hidden in the door frame or in the floor, among other locations.
A door closer can provide significant benefits, including reducing the amount of wear and abuse a door takes over time. One safety feature provided by the door closer is controlled door movement, which can prevent pets or small children from being caught or injured by a slamming door. Automatically closing doors can prevent air from entering or leaving, which helps maintain a constant temperature within a room and reduces heating or cooling costs. This feature also helps contain fire outbreaks by cutting flames from other areas of a building.
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