If you go with a small room like that, then you can use a classic design with a coolbot and a heater on a thermostat (with a duct sock if you can afford it) and an ultrasonic humidifier on a timer. Once you fill it with cheese, it will be stable. Add in some ammonia exhaust (fan) and a source of filtered air and you're done.
Sorry I missed this thread, but fyi we have supplied several small creameries now in this cave size range with ultrasonic humidification and control
, and also have temperature controllers that can be used to plug in up to a 1,750 watt heater. I quoted Pav because it reminded me that maybe we need to put together an air exchange system for these small-to-medium sized caves as well. We have a customer in WA who told me their two new caves were designed to have 12 air-exchanges per 24hr, and because of that was having trouble maintaining humidity which was corrected with a 3-head fogger. I would like to find out more about air-flow and exchange so maybe worth a seperate thread to tap the forum's resources?
I will add that I've experimented with "pumping" un-filtered air using a small aquarium pump into a 21 cu. ft. fridge. If there is a preferred exchange rate it's possible a mini-system could be designed as well if it would be beneficial.