FC-OPD-01 Blast-pressure Relief Dampers is designed to release overpressure caused by sudden pressure increase inside buildings in accidents such as explosions, or pressurized container breaking. It may consist of one or multiple venting panels working together. The dampers are precisely calibrated to release at specific pressure for optimized protection, thereby avoiding catastrophic damage, while in normal days, they could withstand heavy wind pressure and provide air and water tight performance. After pressure release, the dampers can be used again after quick reset.