I'm shopping online for a fridge I can convert to a lagering/fermentation chamber. Is 4.4 cu ft large enough for a big carboy? If not, what size do I need? Space is really difficult to find in my house so I need to be as compact as possible with new brewing equipment. (But while we're at it: how small can I go and still fit one 6 gal and one 5 gal carboy?)