combines the ease of use and flexibility of the wire-bound foil flex with the fire resistance and airflow efficiency of semi-rigid aluminum flex. 25 feet of the safest, most efficient and easiest to work with clothes dryer transition duct on the market. This transition duct meets the very stringent Underwriters Laboratories UL2158A standard that the ICC Residential & Mechanical Codes require.
- Not your typical wire-bound foil flex
- Accommodates all Dryerbox models
- Impressive stretch to compressed ratio
- Maintains the full 4" inside dimension
Bottom line, this flex combines all the positive aspects of semi-rigid and foil flex and eradicates the unpopular aspects of semi-rigid and foil flex like air flow efficiency, fire containment, recoil ratio and bend radius. We’ve achieved a hybrid flex that we can confidently stand behind. Prepare to be impressed. Disclaimer:
The 25' sections of DryerFlex™ transition duct are no different than the 4' and 8' sections with respect to its material. However, strict Underwriters Laboratory (UL) regulations only allow transition ducts that are 8' or shorter to be UL2158A Listed
. Therefore, the 25' sections are not UL-Listed. All 4' and 8' DryerFlex sections are UL-Listed 2158A.