First Attempt.

[Ron Pratt]

No fan needed if it is a normal refrigerator which cycles thus circulating air. In that process it is drawing off moisture that the aging meat will be giving up via the UMAi Dry® bag. Short of testing it with a humidistat I don’t know how to check otherwise. Would suggest you check on it after say the first 7 days to make sure that the meat surface has started to darken and that there is no evidence of moisture inside the bag. Ron