So, my cousin and I built a couple of fermentation chambers using chest freezers and temp controllers. I’m looking for ideas for heating the chest freezers for winter time. I live in Michigan where the temp can stay cold. The chest freezers will be in the garage where will be consistently below freezing. During the winter months, I’m thinking of doing a few different lagers over the winter time as our home brew set up is at his cottage where it will be winterized, so we won’t be brewing for a few months, while the house is unoccupied. The electricity will obviously still be on, but water will be shut off. Looking for ideas from you wonderful people. TYIA