Originally Posted by Erroneous
And I'm not so sure the solid bung would be a good idea with a glass carboy. Vacuums are more dangerous than being pressurized.
If you already have the fridge and want to use it for fermenting, you can a) purchase a Johnson controller, b) search for Ebay aquarium controller, c) modify your fridge's thermostat to work at a higher temp, or d) program and wire up an arduino to control it
You're right, but I don't think that would come into play unless you're talking at least 80 or so degrees of temperature change, not 15.