This is a first for us.  We had a recycle hood on every stove/oven before.  We went through a remodel and punched a hole in the roof so that the air is totally rememoved.  We were pleasently surprised at how quiet it was on low, and out much grease is captured in the screen.  We make it a point to remove the screen once a week and have it washed in our GE dishwasher.  Definitely a plus to our kitchen.