Item #F334 DRITEC PRO 150 DUCTING SPECS Model F334 Temperature range -20 ºF to 325 ºF (28.9 ºC to 162 ºC) Circumference 2" (5cm) Length 13 ft (4m) Weight 3.25 lbs. (1.5 L) Safety UL 94 V-O flame retardant   DriTec Pro 150 Ducting Kit The 2-inch moist air outlet on the DriTec Pro 150 must be ducted to operate properly (see note below). The ducting kit includes 2-inch ducting that is 13 feet long, and one 2-inch hose clamp. It is lightweight, flexible and listed as a UL 94 V-O flame retardant. IMPORTANT: This ducting has a heat rating of 325 ºF (162.8 ºC), which is the rating required for the DriTec Pro 150. Note: The 4-inch dry air outlet may or may not be ducted using standard ducting; use no ducting for maximum operating capacity. If 4-inch ducting is used, use no more than 13 feet when operating on low, and no more than 32 feet on high. Compatable with the DriTec Pro 150