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Door low traffic means there are less people in and out of the door. Closing the door of light can be used on the exterior door or doors inside. Although they usually correspond to an exterior door with a size of 4 meters, but they can still be used on external doors 5 feet. They fit on the toilet door.
Many people enter and exit through the door means it's a heavy-duty door closer. With a heavy duty cover, very important to determine the size of the door first if you fit with them. Generally, heavy door closers can be installed with this type of door between 3 to 6 foot size. While the heavy duty cover they can only be installed with an interior door (size 4'1 / 5 ") and exterior doors (3 '1 / 2" size). Also ask if all products have passed the test and certified under ANSI, A156.4 Standard class.
closing the door on some products also come with electric sensors that can be very useful in an emergency fire. This sensor allows to open the door until the door closed a few cause problems. Life safety codes such as NFPA 101 is another aspect to look into when buying all of these devices.