Click here to purchase Product Details Published: 2019 ANSI: ANSI Approved Number of Pages: 2 Units of Measure: Dual File Size: 1 file , 12 KB
09/11/202008/11/2019AT-84-12-2 — What is a Smoke Damper? A Summary of UL Standard 555S-Leakage-Rated Dampers for Use in Smoke Control Systems