The wal-mart dehydrator works great. I used it yesterday to make about 5lbs of deer jerky and it turned out great. About 3hrs per batch and it took three batches with the number of trays provided. Using grounddeer in the jerky gun worked the best for me. I talked to a guy yesterday that saw the show about using the air filters and fan, sounds interesting but i'm curious about the bacteria, doesn't sound real sanitary.