I was wondering if anyone has any info on closed column dewaxer extractors. I found a set up on bestvaluevacs and was wondering if it is safe to pull to vacuum and blast a closed column while it is at subzero temperature? It is not a closed loop so there is no reclaim chamber. I know that closed loop is better but it's not in my budget. Any help would be greatly appreciated. Sent from my SM-G935P using Grasscity Forum mobile app