Unifrax’s FyreWrap® Elite® 1.5 Duct Insulation is a singlelayer flexible duct wrap enclosure for 1- and 2-hour fire-rated air distribution systems (ADS ducts). Typical duct types include smoke control, hazardous exhaust, laboratory chemical fume, stairwell and vestibule pressurization, ventilation, supply/return ducts, commercial dryer exhaust,  as well as refuse and linen chutes. This slim, compact design is an alternate to code prescribed fire-rated shafts and results in significant weight, space and labor savings when compared to traditional shafts.