ThermoFlo Premium Ducting 2000SR

good stuff.

I find this 4 inch ducting perfect for the application and I would say it is quite durable. I opted not to buy the high end name brand double walled ducting for budgetary reasons though I know from experience the high end ducting is good stuff this is actually better suited for my uses. I would definitely recommend it to anyone who isn't concerned with having double walled temperature and noise insulation.

Excellent

Great product Works great