Suburban 050715 4" Duct Collar, Grey

Worked for an Atwood furnace . Quick shipping too.

I had one duct for the whole back half of the camper and that blew toward the side door so I used this and some vent pipe and an outlet grill from the auction site to add a vent pointing towards the back.

good product and a good price, used on my Atwood since the price was much lower and they worked fine.

Exactly what we needed! worked great and was easy to reinstall onto our trailer furnace!

Added ducts to an atwood furnace to help cut down its short cycling due to not enough air flow and it reaching the high temp limit too fast