ESP 20020120025 HV FLEXIBLE DUCT EXT KIT (R4.2) 2X25 UFD

Hi-Velocity System™ Flexible Duct, 25 ft Length, 2 in Diameter, 10 in-WC Positive, 1/2 in-WC Negative, R-Value: R4.2

Hi-velocity flexible duct can be installed quickly and easily, delivering the air quietly with a sound absorbing inner core. The inner core is made of a double lamination of foil laminate and clear polyester film which is interlaced with a galvanized steel wire (0.041 in) having a 3/4 in pitch. The core is wrapped with fiberglass insulation certified GREENGUARD having a coefficient of R4.2/R8.4 and is encapsulated by a metalized vapor barrier reinforced with fiberglass string.