You can install this cathedral box on a vaulted or flat ceiling using the trim collar that is included with the purchase. The black finish matches other DuraPlus components and pipes of appropriate size, and the limited lifetime warranty offers long-term peace of mind. No matter what kind of appliance you need to install, you should first check out the venting pipe and the components that are available. If you have to pass your venting through the ceiling, you should definitely look at this DuraPlus Square Cathedral Ceiling Support Box.
I would recommend this item to a friend.
Decent product and fast delivery
December 31, 2011
Delivered timely and fit the bill for what I needed. Good directions for different applications and is working fine in my shop.