Now that the temperature has dropped and my proofers are in my garage, this item will hold the set temperature with no problems. Freezer. In the summer I moved them from the basement to the garage and switched from the RANCO temperature controller to the STC-1000, which I flashed with the STC-1000+ firmware. Temperatures have dropped to freezing lately and those heating cables (I have two temperature chambers) have worked great to keep the fermentation at the exact temperature I want. I was concerned when I opened the packaging because the cables are so thin, but as long as they do their job, no part of the cable gets hot. I'll let you know around January when these things can't handle the temperatures getting really cold, but for now they're working great.
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