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Door Closers and Door Openers

A door closer is a mechanical device that closes a door, after someone opens it, or after it was automatically opened.
There are two general types of door closers:

  • Manual Door Closer: a manual door closer will close a door after it has been opened by hand. The speed may be adjustable by set of screws that control a hydraulic (oil-filled) damper. This type of door closer would be used on a swing door
  • Automatic Door Closer: an automatic door closer or as it is often being called a door opener, opens the door under control of a push button, keypad, motion detector or other device. The door will start closing automatically using a motion or proximity detector to determine when it is safe to close the door

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