"Mikepier" wrote in message
...
On Jan 6, 1:46 pm, "John Grabowski" wrote:
*That 2.5" opening is the flap on the vent opening, not the duct diameter.


Seems odd they would make a 4" dryer vent with only a 2.5" flap. What
is the purpose of that?



*You are looking at it wrong. The flap swings open 2.5". The actual opening
area is much greater. It might be 2.5 inches by 4.25 inches wide.