the smoker i just purchased has dual adjustable vents on the top. but the way they are installed they do not close completely.. (they only go to 50% then stop both vents) is this normal for this model. ive tried looking it up and searching other forums but have found nothing.
The vents are designed with stops to prevent the user from "accidently"
closing the vents all the way down while smoking.
Usually, you want leave those top vents fully open to keep air flowing during a smoke to avoid creosote or acrid taste on the meat.
If you want to be able to close the top vents down further than 50%, there are probably some stop tabs that can be defeated. Though, doing so may void your warranty.