I have two converted chest freezers and a fridge I use as fermentation chambers. You need temp controllers on everything AND your chest freezer will need to have a fan inside with a tub of DryLock. Chest freezers typically will have condensation form inside due to the freeze thaw cycle, and you'll get rust and mildew form in the unit. A fan recycling the air will stop the water issues. Your beer will turn out great.
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