Dryer transition duct

Choose the Highest UL Fire Resistance Class
For safety reasons and added peace of mind, only UL2158A listed ducting, like DryerFlex, should be used to connect the dryer's exhaust system (non-listed hose such as that commonly used to vent bathroom fans should never be used). While building code and dryer manufacturers all require a UL 2158A listed transition duct, there are differences upon further testing. It is very common to find listed material that is fairly safe but does develop smoke and flame spread at lower temperatures. DryerFlex is the only flexible duct that has zero flame spread and zero smoke developed meaning it withstands fire exposure up to 482° with zero development of smoke or fire.
How DryerFlex Helps
Makes Connecting and Cleaning Easier
Helps To Protect Against Flame Spread
Saves Money on Power Bills
Lengthens Dryer Life