dryer venting

[ugabulldog]

The best way to vent my dryer is a straight run in a walk in closet aong the back wall at floor level. I would insulate duct. I don't want to build a box to protect it but rather put a long wire shoe rack over it. I cant find anything in codes about protecting ducts, thoughts? Thanks

[flyingvan]

Remember also you have to replace that air you're venting out---at least the same size vent coming in

[ugabulldog]

Remember also you have to replace that air you're venting out---at least the same size vent coming in

Dryer, not hvac

[Redoverfarm]

Use rigid aluminum 4" and not the flexible.  In addition use a louvered outside wall cap that will close when not in use.  Something similar to this

[MountainDon]

Dryer, not hvac

Still, if air is pushed out any vent it must come in someplace else. If the house is tightly built that could be down a chimney flue. Just off hand I do not know what the code says about dryer venting. If that was a fuel burning water heater, for example, it would require an inlet duct or be in a non habitable space.

If it is a run of more than a few feet I like the rigid tube John mentioned. Maybe some alum flex here or there to make curves / bends easier.

[Tickhill]

I used 3" PVC pipe to get thru wall and brick veneer then 90 degree down below my deck and then louvered outside wall cap.

[Adam Roby]

Note that every elbow reduces your effective length by 4 feet.  This is a pretty decent guide to how many linear feet is effective given the type of exhaust pipe used.

http://www.appliance411.com/faq/dryer-vent-length.shtml