ALL NEW UL555 (Fire Damper) and UL555S (Smoke Damper) Test Standards begin JULY 1, 2002!!!!! (Click Here for the NEW UL Listings for ALL Damper Manufacturers)
What do they mean to you? What type and sizes of dampers will be available?
Click and print out the three reports listed below in order to answer the questions above and learn all about the UL changes and what they mean to you (PDF files):
Be sure to check out the newly updated FSD Interactive Selection Guide.