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Ventilation for fermentation fridge/freezer?

I am looking to acquire a fridge or two to use as fermentation chambers, but I am curious if I need to worry about CO2 generation and ventilation. The fridge units are typically well-sealed and, assuming I am not opening the door often, there could be quite a bit of CO2 build up during fermentation. If I go this route should I add some sort of one-way vent or is it unnecessary?

I have never had a problem.

Just don’t shove your face in there immediately after you open the door.


Less chance of O2 … Sneezles61

Never had any issue. Only open fridge. For change of keg. Or hops or yeast

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