Product review (5 stars): Good Value, Durable & Easy to Install
The roof cap came double boxed and arrived within the expected time frame. It was a low cost leader from the seller which drove part of my decision to purchase along with visiting the manufacture's site. It was simple to install and came with good simple directions whicha re also available on manufacturer's website. Came with a reducer coupler from 3" to 4" ducting. Most bath fans are 3" outlets and this cap has a 4" opening and the adapter allows for an easy connection - at least in my application. The backdraft damper is maybe the only possible questionable feature of this item that is 5 stars. It does not allow for a 100% seal the way it is designed because the flap has no offset to allow for the additional thickness of the closed foam seal used. I was able to make the addition of a flap to cover the small 1/4" area that the foam is unable to seal at near the hinge. It certainly is sufficiently sealed otherwise, I am just a little fussy about any air leaks in my house.