Lots easier to warm a fermenter than keep it cool.
I put the Brown Porter in the former kegger fridge on Saturday. Just in time for a cold (37F this morning) snap! I have a small power supply from an external hard drive that I'll probably install today as a heater. Has a built-in fan and I'll run the cable out to the Ranco. If I need more heat, I'll put an old drive in it, that's good for another 25 watts.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk