I purchased a Bradley 4 rack digital a couple of years ago that I've used for bacon, garlic sausage and hot smoked salmon with good success. Where I live the winter temps routinely get down to -30 C with -10 C being average in the winter. I'd like to try cold smoking some salmon on warmer winter days when its between 0 and -10 C. Considering the temp would I still need to use a cold smoke adaptor or would the cabinet stay cold enough without?