MUJIN HUTECH is the best company of Automatic pressure differential air supply Damper with the technology and system in Korea. Since buildings are bigger and higher, the damage of human life can be increased by smoke in fire. Smoke control system is necessary to decrease this damage. NFSC requires a pressure differential of 40 Pa~60 Pa in the aisle of the escape stairway. MUJIN HUTECH will be a global corporation with making innovative products considering safety and life through continuous research and development.