Acoustical soundproofing door closer with manual operation

Choosing a Manual Commercial Door Closer
Door closers play an important role in commercial/office buildings. Manual door closers shut external doors automatically without having to use electricity. They serve two major purposes. First, door closers ensure security because they close whether human force is exerted or not. Second, they help to make sure that fire is not spread from one building to another or from one section of a building to the next during a fire accident. Another reason to fix door closers is to prevent indoor air from leaking out and keep outside weather and air outside.
Door Closers Control Noise
Contractors recommend the installation of door closers on every external door of a building. They are particularly important on doors of fire exit and/or doors that open only from the inside. As a matter of fact, many regions and cities have made it compulsory to install them on commercial doors. They are also fitted to doors as a method of limiting noise from travelling from one part to another part of a building or from one room to the next, in case someone forgets to shut a door behind him.
Types of Manual Door Closers
Manually operated commercial door closers come in two major styles: The first type is overhead mounted. One end of these door closers is fitted to the door frame and the other end to the door. It stores the energy generated by the force of opening of the door briefly and releases it to shut the door. Hydraulic springs or dampers within the mechanism stops the door from slamming shut and regulates the speed of closing of the door. This speed and regulation can be adjusted by screws provided.
Jamb mounted closers are hidden door closers working on the very basic principle as the overhead type. However, as the name suggests, jamb mounted closers are concealed from view. They are installed between the door and the inside part of the door frame. They become invisible as the door closes. Speed and control are adjustable as well.
Conclusion
Since both types of door closers do not differ much, choosing one of them depends on your preference. Concealed closers can cost you more in some cases though it is not necessarily so always. As a thumb rule, if aesthetic appearance won’t matter, overhead commercial closers will suffice, like fire doors. When it comes to commercial buildings where aesthetic appearance is important (i.e. heritage buildings), concealed closers are the choice because it will not affect the look of the facade. Many manufacturers make manual commercial door closers in varied finishes in both styles. Therefore it is easier for you to locate one that fits with the building’s decor.