Product review (5 stars): Heartland 21000 Dryer Vent replacement
We originally installed one of these 15 or more years ago. Two years ago, the vent lid cracked.  It's on the south side of the house and had become brittle. More cracks have shown up recently, probably due to UV exposure. I ordered a replacement with the intent of replacing the entire unit. However, once I had the new one, I decided just to replace the cracked vent lid. The remainder of the unit is OK and works as well as it did when first installed.

The only obvious difference I could see between the new and old units was the thichness/weight of the internal floating cap. The newer one is much lighter weight than the older one, but may work better as a result. I haven't tried it.

Bottom line: I highly recommend this dryer vent!