Round Smoke Dampers
UL 555S Leakage Class I or II
Round smoke dampers close to prevent the circulation of air and smoke through a duct or ventilation opening in a smoke barrier. The SMDR series is UL 555S classified with leakage class I or II.
Round smoke dampers close to prevent the circulation of air and smoke through a duct or ventilation opening in a smoke barrier. The SMDR series is UL 555S classified with leakage class I or II.
