In my great move-the-brewing-area-to-the-garage movement, I am looking at either doing two mini-fridge-collared fermentation chambers, or doing one larger mini-fridge-powered one. In the case of the second, is there a fermentation controller that would have one cooling circuit and two heating circuits? I'd like the possibility of having two different fermentation temperatures available, but I would only have one power control for the fridge. Essentially, I'd like an "OR" on the cooling circuits for the two thermostats.